P5G41-M LX2 Series
• P5G41-M LX2
• P5G41-M LX2/GB
Motherboard
E5070
First Edition V1
October 2009
Copyright © 2009 ASUSTeK Computer Inc. All Rights Reserved.
No part of this manual, including the products and software described in it, may be reproduced,
transmitted, transcribed, stored in a retrieval system, or translated into any language in any form or by any
means, except documentation kept by the purchaser for backup purposes, without the express written
permission of ASUSTeK Computer Inc. (“ASUS”).
Product warranty or service will not be extended if: (1) the product is repaired, modied or altered, unless
such repair, modication of alteration is authorized in writing by ASUS; or (2) the serial number of the
product is defaced or missing.
ASUS PROVIDES THIS MANUAL “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OR CONDITIONS OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL ASUS, ITS
DIRECTORS, OFFICERS, EMPLOYEES OR AGENTS BE LIABLE FOR ANY INDIRECT, SPECIAL,
INCIDENTAL, OR CONSEQUENTIAL DAMAGES (INCLUDING DAMAGES FOR LOSS OF PROFITS,
LOSS OF BUSINESS, LOSS OF USE OR DATA, INTERRUPTION OF BUSINESS AND THE LIKE),
EVEN IF ASUS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES ARISING FROM ANY
DEFECT OR ERROR IN THIS MANUAL OR PRODUCT.
SPECIFICATIONS AND INFORMATION CONTAINED IN THIS MANUAL ARE FURNISHED FOR
INFORMATIONAL USE ONLY, AND ARE SUBJECT TO CHANGE AT ANY TIME WITHOUT NOTICE,
AND SHOULD NOT BE CONSTRUED AS A COMMITMENT BY ASUS. ASUS ASSUMES NO
RESPONSIBILITY OR LIABILITY FOR ANY ERRORS OR INACCURACIES THAT MAY APPEAR IN THIS
MANUAL, INCLUDING THE PRODUCTS AND SOFTWARE DESCRIBED IN IT.
Products and corporate names appearing in this manual may or may not be registered trademarks or
copyrights of their respective companies, and are used only for identication or explanation and to the
owners’ benet, without intent to infringe.
ii
Contents
Notices .......................................................................................................... v
Safety information ...................................................................................... vi
About this guide ......................................................................................... vi
P5G41-M LX2 Series specications summary ....................................... viii
Chapter 1: Product introduction
1.1 Before you proceed ..................................................................... 1-1
1.2 Motherboard overview .................................................................
1.2.1 Motherboard layout .........................................................
1.2.2 Layout contents ...............................................................
1.3 Central Processing Unit (CPU) ...................................................
1.4 System memory ...........................................................................
1.4.1 Overview ......................................................................... 1-3
1.4.2 Memory congurations ....................................................
1.5 Expansion slots ............................................................................
1.5.1 Installing an expansion card ...........................................
1.5.2 Conguring an expansion card .......................................
1.5.3 PCI slots ..........................................................................
1.5.4 PCI Express x1 slot .........................................................
1.5.5 PCI Express x16 slot .......................................................
1.6 Jumpers ........................................................................................
1.7 Connectors .................................................................................
1.7.1 Rear panel ports ...........................................................
1.7.2 Internal connectors ........................................................
1.8 Software support ........................................................................
1.8.1 Installing an operating system ......................................
1.8.2 Support DVD information ..............................................
1-2
1-2
1-2
1-3
1-3
1-4
1-7
1-7
1-7
1-7
1-7
1-7
1-8
1-10
1-10
1-11
1-17
1-17
1-17
Chapter 2: BIOS information
2.1 Managing and updating your BIOS ............................................ 2-1
2.1.1 ASUS Update utility ........................................................
2.1.2 ASUS EZ Flash 2 ............................................................
2.1.3 ASUS CrashFree BIOS ...................................................
2.2 BIOS setup program ....................................................................
2-1
2-2
2-3
2-3
iii
Contents
2.3 Main menu .................................................................................... 2-4
2.3.1 System Time ...................................................................
2.3.2 System Date ...................................................................
2.3.3 Primary IDE Master/Slave, SATA1~4 ..............................
2.3.4 Storage Conguration .....................................................
2.3.5 System Information .........................................................
2.4 Advanced menu ...........................................................................
2.4.1 CPU Conguration ..........................................................
2.4.2 Chipset ............................................................................ 2-8
2.4.3 Onboard Devices Conguration ......................................
2.4.4 USB Conguration ..........................................................
2.4.5 PCI PnP ........................................................................
2.5 Power menu ................................................................................
2.5.1 Suspend Mode ..............................................................
2.5.2 ACPI 2.0 Support ..........................................................
2.5.3 ACPI APIC Support .......................................................
2.5.4 APM Conguration .........................................................
2.5.5 Hardware Monitor ..........................................................
2.6 Boot menu ..................................................................................
2.6.1 Boot Device Priority ......................................................
2.6.2 Boot Settings Conguration ..........................................
2.6.3 Security ......................................................................... 2-13
2.7 Tools menu .................................................................................
2.7.1 ASUS EZ Flash 2 ..........................................................
2.8 Exit menu ....................................................................................
2-4
2-4
2-4
2-5
2-6
2-6
2-7
2-9
2-9
2-10
2-10
2-10
2-10
2-10
2-11
2-11
2-12
2-12
2-12
2-14
2-14
2-14
iv
Notices
Federal Communications Commission Statement
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two
conditions:
• This device may not cause harmful interference, and
• This device must accept any interference received including interference that may cause
undesired operation.
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This
equipment generates, uses and can radiate radio frequency energy and, if not installed
and used in accordance with manufacturer’s instructions, may cause harmful interference
to radio communications. However, there is no guarantee that interference will not occur
in a particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the user
is encouraged to try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment to an outlet on a circuit different from that to which the receiver is
connected.
• Consult the dealer or an experienced radio/TV technician for help.
The use of shielded cables for connection of the monitor to the graphics card is required
to assure compliance with FCC regulations. Changes or modications to this unit not
expressly approved by the party responsible for compliance could void the user’s authority
to operate this equipment.
Canadian Department of Communications Statement
This digital apparatus does not exceed the Class B limits for radio noise emissions from
digital apparatus set out in the Radio Interference Regulations of the Canadian Department
of Communications.
This class B digital apparatus complies with Canadian ICES-003.
REACH
Complying with the REACH (Registration, Evaluation, Authorisation, and Restriction of
Chemicals) regulatory framework, we published the chemical substances in our products at
ASUS REACH website at http://green.asus.com/english/REACH.htm.
DO NOT throw the motherboard in municipal waste. This product has been designed to
enable proper reuse of parts and recycling. This symbol of the crossed out wheeled bin
indicates that the product (electrical and electronic equipment) should not be placed in
municipal waste. Check local regulations for disposal of electronic products.
DO NOT throw the mercury-containing button cell battery in municipal waste. This symbol
of the crossed out wheeled bin indicates that the battery should not be placed in municipal
waste.
v
Safety information
Electrical safety
• To prevent electric shock hazard, disconnect the power cable from the electric outlet
before relocating the system.
• When adding or removing devices to or from the system, ensure that the power cables
for the devices are unplugged before the signal cables are connected. If possible,
disconnect all power cables from the existing system before you add a device.
• Before connecting or removing signal cables from the motherboard, ensure that all
power cables are unplugged.
• Seek professional assistance before using an adapter or extension cord. These devices
could interrupt the grounding circuit.
• Ensure that your power supply is set to the correct voltage in your area. If you are not
sure about the voltage of the electrical outlet you are using, contact your local power
company.
• If the power supply is broken, do not try to x it by yourself. Contact a qualied service
technician or your retailer.
Operation safety
•
Before installing the motherboard and adding devices on it, carefully read all the manuals
that came with the package.
•
Before using the product, ensure that all cables are correctly connected and the power
cables are not damaged. If you detect any damage, contact your dealer immediately.
•
To avoid short circuits, keep paper clips, screws, and staples away from connectors,
slots, sockets and circuitry.
•
Avoid dust, humidity, and temperature extremes. Do not place the product in any area
where it may become wet.
•
Place the product on a stable surface.
•
If you encounter technical problems with the product, contact a qualied service
technician or your retailer.
About this guide
This user guide contains the information you need when installing and conguring the
motherboard.
How this guide is organized
This guide contains the following parts:
•
Chapter 1: Product introduction
This chapter describes the features of the motherboard and the new technology it
supports.
• Chapter 2: BIOS information
This chapter tells how to change system settings through the BIOS Setup menus.
Detailed descriptions of the BIOS parameters are also provided.
vi
Conventions used in this guide
To ensure that you perform certain tasks properly, take note of the following symbols used
throughout this manual.
DANGER/WARNING: Information to prevent injury to yourself when trying to
complete a task.
CAUTION: Information to prevent damage to the components when trying to
complete a task.
IMPORTANT: Instructions that you MUST follow to complete a task.
NOTE: Tips and additional information to help you complete a task.
Where to nd more information
Refer to the following sources for additional information and for product and software
updates.
1. ASUS websites
The ASUS website provides updated information on ASUS hardware and software
products. Refer to the ASUS contact information.
2. Optional documentation
Your product package may include optional documentation, such as warranty yers,
that may have been added by your dealer. These documents are not part of the
standard package.
Typography
Bold text Indicates a menu or an item to select.
Italics
Used to emphasize a word or a phrase.
<Key> Keys enclosed in the less-than and greater-than sign means
that you must press the enclosed key.
Example: <Enter> means that you must press the Enter or
Return key.
<Key1>+<Key2>+<Key3> If you must press two or more keys simultaneously, the key
names are linked with a plus sign (+).
Example: <Ctrl>+<Alt>+<D>
vii
P5G41-M LX2 Series specications summary
CPU LGA775 socket for Intel® Core™2 Quad / Core™2 Extreme
Chipset Northbridge: Intel® G41
Front Side Bus 1333/1066/800 MHz
Memory Dual channel memory architecture
Graphics Integrated Intel® Graphics Media Accelerator
Expansion slots 1 x PCIe x16 slot
Storage 1 x Ultra DMA 100/66 connector
LAN P5G41-M LX2/GB: Realtek® RTL8112L Gigabit Ethernet
Audio VIA® VT1705 High Denition Audio 6-channel CODEC
USB Supports up to 8 USB 2.0/1.1 ports (4 ports at mid-board,
/ Core™2 Duo / Pentium® dual-core
/ Celeron® dual-core / Celeron® processors
Supports Intel® 45nm multi-core CPU
Supports Intel® Hyper-Threading Technology and
Enhanced Intel SpeedStep® Technology (EIST)
* Refer to www.asus.com for Intel® CPU support list.
Southbridge: Intel® ICH7
- 2 x 240-pin DIMM sockets support unbuffered
non-ECC 800/667 MHz DDR2 memory modules
- Supports up to 8GB system memory
* Refer to www.asus.com for the latest Memory QVL
(Qualied Vendors Lists).
** When you install a total memory of 4GB or more,
Windows® 32-bit operating system may only recognize
less than 3GB. We recommend a maximum of 3GB
system memory if you are using a Windows® 32-bit
operating system.
(Intel® GMA 4500)
Supports D-Sub with max. resolution of
2048 x 1536 x 32Bpp @ 75Hz
Supports Microsoft® DirectX 10
1 x PCIe x1 slot
2 x PCI slots
4 x Serial ATA 3Gb/s ports
PCIe controller
P5G41-M LX2: Realtek® RTL8103EL 10/100Mbps
Ethernet PCIe controller
Supports Multi-streaming technology
4 ports at the back panel)
viii
(continued on the next page)
P5G41-M LX2 Series specications summary
Back panel I/O ports 1 x PS/2 keyboard port
Internal connectors 2 x USB 2.0/1.1 connectors support additional
ASUS unique features ASUS CrashFree BIOS 3
BIOS 8Mb Flash ROM, AMI BIOS, PnP, DMI 2.0, WfM 2.0,
Accessories 2 x Serial ATA cables
Support DVD Drivers
Form factor MicroATX form factor: 9.6 in x 7.5 in (24.4 cm x 19.1 cm)
1 x PS/2 mouse port
1 x COM port
1 x VGA port
1 x LAN (RJ-45) port
4 x USB 2.0/1.1 ports
1 x LPT port (optional)
6-channel audio I/O ports
4 USB 2.0/1.1 ports
1 x IDE connector
4 x Serial ATA connectors
1 x High denition front panel audio connector
1 x System panel connector
1 x CD audio-in connector
1 x CPU fan connector
1 x Chassis fan connector
1 x 24-pin EATX power connector
1 x 4-pin ATX 12V power connector
1 x Chassis intrusion connector (optional)
1 x Floppy disk drive connector (optional)
ASUS Q-Fan
ASUS EZ Flash 2
ASUS MyLogo 2
ACPI 2.0a, SM BIOS 2.5
1 x Ultra DMA 100/66 cable
1 x I/O shield
1 x Support DVD
1 x User Manual
ASUS PC Probe II
ASUS Update
Anti-Virus software (OEM version)
* Specications are subject to change without notice.
ix
Chapter 1
SB_PWR
ON
Standby Power Powered Off
OFF
P5G41-M LX2/GB Onboard LED
P5G41-M LX2/GB
Product introduction
Thank you for buying an ASUS® P5G41-M LX2 Series motherboard!
Before you start installing the motherboard, and hardware devices on it, check the items in
your motherboard package. Refer to page ix for the list of accessories.
If any of the items is damaged or missing, contact your retailer.
1.1 Before you proceed
Take note of the following precautions before you install motherboard components or change
any motherboard settings.
• Unplug the power cord from the wall socket before touching any component.
• Before handling components, use a grounded wrist strap or touch a safely grounded
object or a metal object, such as the power supply case, to avoid damaging them due to
static electricity.
• Hold components by the edges to avoid touching the ICs on them.
• Whenever you uninstall any component, place it on a grounded antistatic pad or in the
bag that came with the component.
• Before you install or remove any component, ensure that the ATX power supply is
switched off or the power cord is detached from the power supply. Failure to do so may
cause severe damage to the motherboard, peripherals, or components.
Onboard LED
The motherboard comes with a standby power LED that lights up to indicate that the system
is ON, in sleep mode, or in soft-off mode. This is a reminder that you must shut down
the system and unplug the power cable before removing or plugging in any motherboard
component. The illustration below shows the location of the onboard LED.
ASUS P5G41-M LX2 Series 1-1
1.2 Motherboard overview
P5G41-M LX2/GB
PCIEX16
PCI2
PCI1
PRI_IDE
USB56 USB78
AAFP
ICS
9LPRS441
ATX12V
EATXPWR
CPU_FAN
Intel
®
G41
Lithium Cell
CMOS Power
Super
I/O
AUDIO
VIA
VT1705
RTL
8112L
KBMS
8Mb
BIOS
SB_PWR
CLRTC
USBPW1-4
USBPW5-8
KBPWR
19.1cm(7.5in)
24.4cm(9.6in)
LGA775
Intel
®
ICH7
DDR2 DIMM_A1 (64bit, 240-pin module)
DDR2 DIMM_B1 (64bit, 240-pin module)
VGA
COM1
LAN1_USB12
USB34
SATA1
SATA2
SATA3
SATA4
CHA_FAN
CD
PCIEX1
F_PANEL
271 653 4
2
8
11 9101314 4 12
1.2.1 Motherboard layout
Ensure that you install the motherboard into the chassis in the correct orientation. The edge
with external ports goes to the rear part of the chassis.
Place this side towards
the rear of the chassis.
1.2.2 Layout contents
Connectors/Jumpers/Slots/LED Page Connectors/Jumpers/Slots/LED Page
1. Keyboard power (3-pin KBPWR) 1-9 8. SATA connectors (7-pin SATA1-4) 1-12
2. ATX power connectors (24-pin EATXPWR, 4-pin ATX12V)
3. CPU and Chassis fan connectors (4-pin CPU_FAN and
3-pin CHA_FAN)
4. USB device wake-up (3-pin USBPW1-4, USBPW5-8)
5. LGA775 CPU socket
6. DDR2 DIMM slots
7. IDE connector (40-1 pin PRI_IDE)
1-2 Chapter 1: Product introduction
• P5G41-M LX2 integrates the Realtek® RTL8103EL Fast Ethernet controller.
• P5G41-M LX2/GB integrates the Realtek
®
RTL8112L Gigabit Ethernet controller.
Place six screws into the holes indicated by circles to secure the motherboard to the
chassis. DO NOT overtighten the screws! Doing so can damage the motherboard.
1-11 9. System panel connector (10-1 pin F_PANEL) 1-16
1-12 10. Clear RTC RAM (3-pin CLRTC) 1-8
1-9 11. USB connectors (10-1 pin USB56, USB78) 1-14
1-3 12. Standby power LED (SB_PWR) 1-1
1-3 13. Optical drive audio connector (4-pin CD) 1-15
1-13 14. Front panel audio connector (10-1 pin AAFP) 1-15
1.3 Central Processing Unit (CPU)
P5G41-M LX2/GB 240-pin DDR2 DIMM sockets
DIMM_A1
DIMM_B1
P5G41-M LX2/GB
This motherboard comes with a surface mount LGA775 socket designed for the Intel®
Core™2 Quad / Core™2 Extreme / Core™2 Duo / Pentium® dual-core / Celeron® dual-core /
Celeron® processors.
• Upon purchase of the motherboard, ensure that the PnP cap is on the socket and the
socket contacts are not bent. Contact your retailer immediately if the PnP cap is missing,
or if you see any damage to the PnP cap/socket contacts/motherboard components.
ASUS will shoulder the cost of repair only if the damage is shipment/transit-related.
• Keep the cap after installing the motherboard. ASUS will process Return Merchandise
Authorization (RMA) requests only if the motherboard comes with the cap on the
LGA775 socket.
• The product warranty does not cover damage to the socket contacts resulting from
incorrect CPU installation/removal, or misplacement/loss/incorrect removal of the PnP
cap.
The motherboard supports Intel® LGA775 processors with the Intel® Enhanced Intel
SpeedStep® Technology (EIST) and Hyper-Threading Technology.
1.4 System memory
1.4.1 Overview
The motherboard comes with two Double Data Rate 2 (DDR2) Dual Inline Memory Modules
(DIMM) sockets. The gure illustrates the location of the DDR2 DIMM sockets:
ASUS P5G41-M LX2 Series 1-3
Channel Sockets
Channel A DIMM_A1
Channel B
DIMM_B1
1.4.2 Memory congurations
You may install 512MB, 1GB, 2GB, and 4GB unbuffered non-ECC DDR2 DIMMs into the
DIMM sockets.
• You may install varying memory sizes in Channel A and Channel B. The system maps
the total size of the lower-sized channel for the dual-channel conguration. Any excess
memory from the higher-sized channel is then mapped for single-channel operation.
• Always install DIMMs with the same CAS latency. For optimum compatibility, it is
recommended that you obtain memory modules from the same vendor.
• Due to the memory address limitation on 32-bit Windows
or more memory on the motherboard, the actual usable memory for the OS can be
about 3GB or less. For effective use of memory, we recommend that you do any of the
following:
- Use a maximum of 3GB system memory if you are using a 32-bit Windows
- Install a 64-bit Windows® OS when you want to install 4GB or more memory on
the motherboard.
• This motherboard does not support DIMMs made up of 256 megabits (Mb) chips or less.
P5G41-M LX2 Series Motherboard Qualied Vendors Lists (QVL)
DDR2-667MHz capability
2048MB(Kit
of 2)
4096MB(Kit
of 2)
SS/DSChip
Brand
DS G.SKILL
DS G.SKILL
Super
Talent
Chip NO. CL Voltage
D2 64M8CCF 0815
C7173S
Heat-Sink Package
SN:8151030036559
PG 64M8-800 0750 5 1.8V • •
Vendor Part No. Size
A-Data M2OAD5H3J4170I1C53 2048MB DS A-Data AD20908A8A-3EG 30724 - - • •
Corsair VS1GB667D2 1024MB DS Corsair MID095D62864M8CEC - - • •
Corsair VS512MB667D2 512MB DS Corsair MIII0052532M8CEC - - • •
G.SKILL F2-5400PHU2-2GBNT
G.SKILL F2-5300CL5D-4GBMQ
GEIL GX21GB5300SX 1024MB DS GEIL - 3 - • •
GEIL GX22GB5300LX 2048MB DS GEIL - 5 - • •
GEIL GX24GB5300LDC 2048MB DS GEIL - 5 - • •
Kingston KVR667D2N5/1G(low prole) 1024MB SS Elpida E1108AFSE-8E-F 5 1.8V • •
Kingston KVR667D2N5/512(low prole) 512MB SS Elpida E5108AJBG-6E-E 5 1.8V • •
Kingston KVR667D2N5/2G(low prole) 2048MB DS Elpida E1108AFBG-8E-F 5 1.8V • •
Micron MT8HTF12864AY-667E1 1024MB SS Micron D9HNL 7ZE17 5 - • •
PSC AL7E8F73C-6E1 1024MB SS PSC A3R1GE3CFF734MAA0J 5 - • •
PSC AL6E8E63J-6E1 512MB SS PSC A3R12E3JFF717B9A00 5 - • •
PSC AL6E8E63J-6E1 1024MB DS PSC A3R12E3JFF717B9A01 5 - • •
PSC AL8E8F73C-6E1 2048MB DS PSC A3R1GE3CFF733MAA00 5 - • •
SAMSUNG M378T5263AZ3-CE6 4096MB DS Samsung K4T2G084QA-HCE6 - - • •
Super
T667UB1GV 1024MB DS
Talent
Transcend JM667QLU-1G 1024MB SS Transced TQ243PCF8T0838 5 - • •
Transcend JM667QLJ-1G 1024MB DS Elpida E5108AJBG-6E-E 5 - • •
Transcend JM667QLU-2G 2048MB DS Transced TQ243PCF8T0834 5 - • •
Twinmos 8D-A3JK5MPETP 512MB SS PSC A3R12E3GEF633ACAOY 5 - • •
®
OS, when you install 4GB
DIMM socket
support
(Optional)
A* B*
5-5-5-15 - • •
5-5-5-15 - • •
®
OS.
1-4 Chapter 1: Product introduction
DDR2-800MHz capability
DIMM socket
Vendor Part No. Size
A-Data AD2800E001GOU 2048MB(Kit of 2) SS - - 4-4-4-12 2.0~2.1V • •
A-Data M2GVD6G314170Q1E58 1024MB DS V-Data VD29608A8A-25EG80813 - - • •
A-Data AD2800002GMU 2048MB DS Hynix - - - • •
A-Data AD2800E002GOU 4096MB(Kit of 2) DS - - 4-4-4-12 1.9~2.1V • •
Corsair CM2X1024-6400 1024MB DS Corsair - - - • •
Corsair XMS2-6400 1024MB DS Corsair - 4 - • •
Corsair XMS2-6400 1024MB DS Corsair - 5 - • •
Corsair CM2X2048-6400C5DHX 4096MB(Kit of 2) DS - - 5 - • •
Corsair CM2X2048-6400C5 4096MB(Kit of 2) DS - - 5 - • •
Crucial BL12864AL80A.8FE5(EPP) 2048MB(kit of 2) SS - - 4-4-4-12 - • •
Crucial CT25664AA800.16FG 2048MB DS Micron 8ZG27 D9JWB 6-6-6-12 - • •
Crucial BL25664AL80A.16FE5(EPP) 4096MB(kit of 2) DS - - 4-4-4-12 - • •
Crucial BL25664AR80A.16FE5(EPP) 4096MB(kit of 2) DS - - 4-4-4-12 - • •
G.SkiLL F2-6400PHU2-2GBNR 1024MB SS - - 5-5-5-15 1.9-2.0V • •
G.SKILL F2-6400CL5D-1GBNQ 512MB SS G.SKILL
G.SKILL F2-6400CL4D-2GBPK 1024MB DS G.SKILL - 4 - • •
G.SKILL F2-6400CL5D-2GBNQ 1024MB DS G.SKILL - 5 - • •
G.SKILL F2-6400CL4D-4GBPK 2048MB DS G.SKILL - 4 - • •
G.SKILL F2-6400CL5D-4GBPQ 2048MB DS G.SKILL - 5 - • •
G.SkiLL F2-6400CL6D-4GBMQ 4096MB(Kit of 2) DS - - 6-6-6-18 1.8-1.9V • •
G.SKILL F2-6400CL6Q-16GMQ 4096MB DS - - 5 - • •
GEIL GB22GB6400C4DC 1024MB DS GEIL GL2L64M088BA30EB 5 - • •
GEIL GB22GB6400C5DC 1024MB DS GEIL GL2L64M088BA30EB 5 - • •
GEIL GB24GB6400C4QC 1024MB DS GEIL GL2L64M088BA30EB 4 - • •
GEIL GB24GB6400C5QC 1024MB DS GEIL GL2L64M088BA30EB 5 - • •
GEIL GE22GB800C4DC 1024MB DS GEIL - 4 - • •
GEIL GE22GB800C5DC 1024MB DS GEIL - 5 - • •
GEIL GE24GB800C4QC 1024MB DS GEIL - 4 - • •
GEIL GE24GB800C5QC 1024MB DS GEIL - 5 - • •
GEIL GX22GB6400DC 1024MB DS GEIL - 5 1.8V • •
GEIL GX22GB6400UDC 1024MB DS GEIL - 4 - • •
GEIL GB24GB6400C4DC 2048MB DS GEIL - 5 - • •
GEIL GB24GB6400C5DC 2048MB DS GEIL GL2L128M88BA25AB 5 - • •
GEIL GB28GB6400C4QC 2048MB DS GEIL GL2L128M88BA25AB 4 - • •
GEIL GB28GB6400C5QC 2048MB DS GEIL GL2L128M88BA25AB 5 - • •
GEIL GE24GB800C4DC 2048MB DS GEIL - 4 - • •
GEIL GE24GB800C5DC 2048MB DS GEIL - 5 - • •
GEIL GE28GB800C4QC 2048MB DS GEIL - 4 - • •
GEIL GE28GB800C5QC 2048MB DS GEIL - 5 - • •
GEIL GX22GB6400C4USC 2048MB DS GEIL - 4 - • •
GEIL GX22GB6400LX 2048MB DS GEIL - 5 - • •
GEIL GX24GB6400DC 2048MB DS GEIL - 5 - • •
Kingmax KLDD48F-B8KU5 NGES 1024MB SS Kingmax KKB8FNUBF-DNX-25A - - • •
Kingmax KLDE88F-B8KU5 NHES 2048MB DS Kingmax KKB8FNUBF-DNX-25A - - • •
Kingston KVR800D2N5/1G(low prole) 1024MB SS Elpida E1108AFSE-8E-F 5 1.8V • •
Kingston KVR800D2N6/1G(low prole) 1024MB SS Elpida E1108AFBG-8E-F 6 1.8V • •
Kingston KHX6400D2K2/2G 2048MB(Kit of 2) DS - - 5-5-5-15 2.0V • •
Kingston KVR800D2N5/2G) 2048MB DS Kingston D1288TEFCGL25U 5 1.8V • •
Kingston KVR800D2N6/2G(low prole) 2048MB DS Samsung K4T1G084QE 6 1.8V • •
Kingston KVR800D2N6/4G 4096MB DS Elpida E2108ABSE-8G-E 6 1.8V • •
Micron MT16HTF25664AY-800G1 2048MB DS Micron 8ZG27 D9JWB 6-6-6-12 - • •
OCZ OCZ2G800R22GK 1024MB DS OCZ - 4-5-5-15 2.0V • •
OCZ OCZ2P800R22GK 1024MB DS OCZ - 4-4-4-15 1.9-2.1V • •
SS/DSChip
Brand
Chip NO. CL Voltage
Heat-Sink Package
SN:8151030036642
5-5-5-15 - • •
support
(Optional)
A* B*
(continued on the next page)
ASUS P5G41-M LX2 Series 1-5
DDR2-800MHz capability
DIMM socket
Vendor Part No. Size
OCZ OCZ2RPR8002GK 1024MB DS OCZ - 4-4-4-15 2.1V • •
OCZ OCZ2VU8004GK 1024MB DS OCZ - 5-6-6-18 1.8V • •
OCZ OCZ2SE8002GK 2048MB(Kit of 2) DS - - 5-5-5-15 1.8V • •
OCZ OCZ2F8004GK(EPP) 2048MB DS - - 5-4-4-18 2.1V • •
OCZ OCZ2P8004GK 4096MB(Kit of 2) DS - - 5-4-4-15 2.1v • •
OCZ OCZ2VU8004GK 4096MB(Kit of 2) DS - - 5-6-6-18 1.8V • •
PSC AL7E8F73C-8E1 1024MB SS PSC A3R1GE3CFF734MAA0E 5 - • •
PSC AL7E8G73F-8E1 1024MB SS PSC P3R1GE3FGF850MAC19 - - • •
PSC AL8E8F73C-8E1 2048MB DS PSC A3R1GE3CFF734MAA0E 5 - • •
PSC AL8E8G73F-8E1 2048MB DS PSC P3R1GE3FGF850MAC19 - - • •
PSC PL8E8F73C-8E1 2048MB DS PSC SHG772-AA3G 5 - • •
PSC PL8E8G73E-8E1 2048MB DS PSC XCP271A3G-A 5 - • •
SAMSUNG M378T2863EHS-CF7 1024MB SS Samsung K4T1G084QE - - • •
SAMSUNG M378T2863QZS-CF7 1024MB SS Qimonda K4T1G084QQ-HCF7 6 - • •
SAMSUNG M378T6553GZS-CF7 512MB SS Qimonda K4T51083QG-HCF7 6 - • •
SAMSUNG M378T2953GZ3-CF7 1024MB DS Samsung K4T51083QG - - • •
SAMSUNG M378T2953GZ3-CF7 1024MB DS Samsung K4T51083QG-HCF7 6 - • •
SAMSUNG M37875663QZ3-CF7 2048MB DS Samsung K4T1G084QQ-HCF7 6 - • •
SAMSUNG M378T5263AZ3-CF7 4096MB DS Samsung K4T2G084QA-HCF7 - - • •
Super
T800UB1GC4 1024MB DS
Talent
Transcend TS128MLQ64V8U 1024MB SS ELPIDA E1108ACBG-8E-E 5 - • •
Transcend TS64MLQ64V8J 512MB SS Micron 7HD22 D9GMH 5 - • •
Transcend JM800QLJ-1G 1024MB DS Transced TQ123PJF8F0801 5 - • •
Transcend JM800QLJ-1G 1024MB DS Transcend TQ123YBF8 T0747 5 - • •
Transcend TS128MLQ64V8J 1024MB DS Mircon 7HD22D9GMH 5 - • •
Transcend JM800QLU-2G 2048MB DS Transced TQ243PCF8 5 - • •
Transcend TS256MLQ64V8U 2048MB DS Elpida E1108ACBG-8E-E 5 - • •
V-Data M2GVD6G3H3160Q1E52 512MB SS V-Data VD29608A8A-25EG20813 - - • •
V-Data M2XSSKG3147C1L1C5Z 1024MB DS Samsung K4T51083QE - - • •
V-Data M2XHYKH3J47CC01E5Z 2048MB DS Hynix
SS/DSChip
Brand
Super
Talent
Chip NO. CL Voltage
- 4 1.8V • •
H5PS1G83EFRS6C
852AK
- - • •
support
(Optional)
A* B*
SS: Single-sided / DS: Double-sided
DIMM support:
• A*: Supports one module inserted into either slot as Single-channel memory
conguration.
• B*: Supports one pair of modules inserted into both slots as one pair of dual-channel
memory conguration.
Visit the ASUS website at www.asus.com for the latest QVL.
1-6 Chapter 1: Product introduction
1.5 Expansion slots
In the future, you may need to install expansion cards. The following sub-sections describe
the slots and the expansion cards that they support.
Unplug the power cord before adding or removing expansion cards. Failure to do so may
cause you physical injury and damage motherboard components.
1.5.1 Installing an expansion card
To install an expansion card:
1. Before installing the expansion card, read the documentation that came with it and
make the necessary hardware settings for the card.
2. Remove the system unit cover (if your motherboard is already installed in a chassis).
3. Remove the bracket opposite the slot that you intend to use. Keep the screw for later
use.
4. Align the card connector with the slot and press rmly until the card is completely
seated on the slot.
5. Secure the card to the chassis with the screw you removed earlier.
6. Replace the system cover.
1.5.2 Conguring an expansion card
After installing the expansion card, congure it by adjusting the software settings.
1. Turn on the system and change the necessary BIOS settings, if any. See Chapter 2 for
information on BIOS setup.
2. Assign an IRQ to the card.
3. Install the software drivers for the expansion card.
When using PCI cards on shared slots, ensure that the drivers support “Share IRQ” or that
the cards do not need IRQ assignments. Otherwise, conicts will arise between the two PCI
groups, making the system unstable and the card inoperable.
1.5.3 PCI slots
The PCI slot supports cards such as a LAN card, SCSI card, USB card, and other cards that
comply with PCI specications.
1.5.4 PCI Express x1 slot
This motherboard supports PCI Express x1 network cards, SCSI cards, and other cards that
comply with the PCI Express specications.
1.5.5 PCI Express x16 slot
This motherboard supports a PCI Express x16 graphics card that complies with the PCI
Express specications.
ASUS P5G41-M LX2 Series 1-7
1.6 Jumpers
P5G41-M LX2/GB
P5G41-M LX2/GB Clear RTC RAM
1 2 2 3
Normal
(Default)
Clear RTC
CLRTC
1. Clear RTC RAM (3-pin CLRTC)
This jumper allows you to clear the Real Time Clock (RTC) RAM in CMOS. You can
clear the CMOS memory of date, time, and system setup parameters by erasing
the CMOS RTC RAM data. The onboard button cell battery powers the RAM data in
CMOS, which include system setup information such as system passwords.
To erase the RTC RAM:
1. Turn OFF the computer and unplug the power cord.
2. Move the jumper cap from pins 1-2 (default) to pins 2-3. Keep the cap on pins 2-3
for about 5-10 seconds, then move the cap back to pins 1-2.
3. Plug the power cord and turn ON the computer.
4. Hold down the
data.
<Del> key during the boot process and enter BIOS setup to re-enter
Except when clearing the RTC RAM, never remove the cap on CLRTC jumper default
position. Removing the cap will cause system boot failure!
• If the steps above do not help, remove the onboard battery and move the jumper again
to clear the CMOS RTC RAM data. After clearing the CMOS, reinstall the battery.
• You do not need to clear the RTC when the system hangs due to overclocking. For
system failure due to overclocking, use the CPU Parameter Recall (C.P.R.) feature. Shut
down and reboot the system, then the BIOS automatically resets parameter settings to
default values.
1-8 Chapter 1: Product introduction
2. Keyboard power (3-pin KBPWR)
P5G41-M LX2/GB
P5G41-M LX2/GB Keyboard Power Setting
21
2 3
+5V
(Default)
+5VSB
KBPWR
P5G41-M LX2/GB
P5G41-M LX2/GB USB Device Wake Up
21
2 3
+5V
(Default)
+5VSB
USBPW5-8
21
2 3
+5V
+5VSB
(Default)
USBPW1-4
This jumper allows you to enable or disable the keyboard wake-up feature. When you
set this jumper to pins 2–3 (+5VSB), you can wake up the computer by pressing a key
on the keyboard (the default is the Space Bar)s. This feature requires an ATX power
supply that can supply at least 1A on the +5VSB lead, and a corresponding setting in
the BIOS.
3. USB device wake-up (3-pin USBPW1-4, USBPW5-8)
Set these jumpers to +5V to wake up the computer from S1 sleep mode (CPU stopped,
DRAM refreshed, system running in low power mode) using the connected USB
devices. Set to +5VSB to wake up from S3 and S4 sleep modes (no power to CPU,
DRAM in slow refresh, power supply in reduced power mode).
ASUS P5G41-M LX2 Series 1-9
1.7 Connectors
8
2
6
79
10
1
3 4
5
1.7.1 Rear panel ports
1. PS/2 mouse port (green). This port is for a PS/2 mouse.
2. LAN (RJ-45) port. This port allows connection to a Local Area Network (LAN) through
a network hub. Refer to the table below for the LAN port LED indications.
P5G41-M LX2 LAN port LED indications
LED (Orange) LED (Green)
Status Description Status Description
OFF No link OFF No link
ORANGE 100Mbps connection GREEN 10Mbps connection
P5G41-M LX2/GB LAN port LED indications
Activity/Link LED Speed LED
Status Description Status Description
OFF No link OFF 10Mbps connection
ORANGE Linked ORANGE 100Mbps connection
BLINKING Data activity GREEN 1Gbps connection
(Orange)
ACT/LINK
LED
LAN port
LED
LAN port
LED
(Green)
SPEED
LED
3. Line In port (light blue).
This port connects a tape, CD, DVD player, or other audio
sources.
4. Line Out port (lime). This port connects a headphone or a speaker. In 4-channel and
6-channel congurations, the function of this port becomes Front Speaker Out.
5. Microphone port (pink). This port connects a microphone.
Refer to the audio conguration table below for the function of the audio ports in 2, 4, or
6-channel conguration.
Audio 2, 4, or 6-channel conguration
1-10 Chapter 1: Product introduction
Port Headset 2-channel 4-channel 6-channel
Light Blue Line In Rear Speaker Out Rear Speaker Out
Lime Line Out Front Speaker Out Front Speaker Out
Pink Mic In Mic In Bass/Center
P5G41-M LX2/GB ATX power connectors
EATXPWR
PIN 1
GND
+5 Volts
+5 Volts
+5 Volts
-5 Volts
GND
GND
GND
PSON#
GND
-12 Volts
+3 Volts
+3 Volts
+12 Volts
+12 Volts
+5V Standby
Power OK
GND
+5 Volts
GND
+5 Volts
GND
+3 Volts
+3 Volts
ATX12V
PIN 1
+12V DC
+12V DC
GND
GND
P5G41-M LX2/GB
6. USB 2.0 ports 1 and 2. These two 4-pin Universal Serial Bus (USB) ports are
available for connecting USB 2.0 devices.
7. USB 2.0 ports 3 and 4. These two 4-pin Universal Serial Bus (USB) ports are
available for connecting USB 2.0 devices.
8. Video Graphics Adapter (VGA) port. This 15-pin port is for a VGA monitor or other
VGA-compatible devices.
9. COM port. This port is for pointing devices or other serial devices.
10.
PS/2 keyboard port (purple). This port is for a PS/2 keyboard.
1.7.2 Internal connectors
1. ATX power connectors (24-pin EATXPWR, 4-pin ATX12V)
These connectors are for ATX power supply plugs. The power supply plugs are
designed to t these connectors in only one orientation. Find the proper orientation and
push down rmly until the connectors completely t.
•
For a fully congured system, we recommend that you use a power supply unit (PSU)
that complies with ATX 12V Specication 2.0 or later version and provides a minimum
power of 400W.
• DO NOT forget to connect the 4-pin ATX12V power plug. Otherwise, the system will not
boot.
• We recommend that you use a PSU with a higher power output when conguring a
system with more power-consuming devices or when you intend to install additional
devices. The system may become unstable or may not boot up if the power is
inadequate.
•
If you are uncertain about the minimum power supply requirement for your system,
refer to the Recommended Power Supply Wattage Calculator at http://support.asus.
com/PowerSupplyCalculator/PSCalculator.aspx?SLanguage=en-us for details.
ASUS P5G41-M LX2 Series 1-11
2. CPU and Chassis fan connectors (4-pin CPU_FAN, 3-pin CHA_FAN)
CPU_FAN
CPU FAN PWM
CPU FAN IN
CPU FAN PWR
GND
Rotation
+12V
GND
CHA_FAN
P5G41-M LX2/GB fan connectors
P5G41-M LX2/GB
SATA2
GND
RSATA_RXN2
RSATA_RXP2
GND
RSATA_TXN2
RSATA_TXP2
GND
SATA1
GND
RSATA_RXN1
RSATA_RXP1
GND
RSATA_TXN1
RSATA_TXP1
GND
SATA4
GND
RSATA_RXN4
RSATA_RXP4
GND
RSATA_TXN4
RSATA_TXP4
GND
SATA3
GND
RSATA_RXN3
RSATA_RXP3
GND
RSATA_TXN3
RSATA_TXP3
GND
P5G41-M LX2/GB SATA connectors
P5G41-M LX2/GB
Connect the fan cables to the fan connectors on the motherboard, ensuring that the
black wire of each cable matches the ground pin of the connector.
DO NOT forget to connect the fan cables to the fan connectors. Insufcient air ow inside
the system may damage the motherboard components. These are not jumpers! Do not
place jumper caps on the fan connectors!
Only the 4-pin CPU fan supports the ASUS Q-Fan feature.
3. Serial ATA connectors (7-pin SATA1-4)
These connectors are for the Serial ATA signal cables for Serial ATA 3Gb/s hard disk
drives and optical disk drives. The Serial ATA 3Gb/s is backward compatible with the
Serial ATA 1.5Gb/s specication. The data transfer rate of the Serial ATA 3Gb/s is faster
than the standard parallel ATA (133 MB/s).
1-12 Chapter 1: Product introduction
4. IDE connector (40-1 pin PRI_IDE)
PRI_IDE
NOTE:Orient the red markings
on the IDE ribbon cable to PIN 1.
PIN1
P5G41-M LX2/GB
P5G41-M LX2/GB IDE connector
The onboard IDE connector is for the Ultra DMA 100/66 signal cable. There are three
connectors on each Ultra DMA 100/66 signal cable: blue, black, and gray. Connect the
blue connector to the motherboard’s IDE connector, then select one of the following
modes to congure your device.
Drive jumper setting Mode of device(s) Cable connector
Single device Cable-Select or Master - Black
Master Black
Slave Gray
Black or gray
Two devices
Cable-Select
Master Master
Slave Slave
• Pin 20 on the IDE connector is removed to match the covered hole on the Ultra DMA
cable connector. This prevents incorrect insertion when you connect the IDE cable.
• Use the 80-conductor IDE cable for Ultra DMA 100/66 IDE devices.
If any device jumper is set as “Cable-Select,” ensure that all other device jumpers have the
same setting.
ASUS P5G41-M LX2 Series 1-13
5. USB connectors (10-1 pin USB56, USB78)
P5G41-M LX2/GB USB2.0 connectors
PIN 1
USB+5V
USB_P6-
USB_P6+
GND
NC
USB+5V
USB_P5-
USB_P5+
GND
USB56
PIN 1
USB+5V
USB_P8-
USB_P8+
GND
NC
USB+5V
USB_P7-
USB_P7+
GND
USB78
P5G41-M LX2/GB
These connectors are for USB 2.0 ports. Connect the USB module cable to any of
these connectors, then install the module to a slot opening at the back of the system
chassis. These USB connectors comply with USB 2.0 specication that supports up to
480Mbps connection speed.
Never connect a 1394 cable to the USB connectors. Doing so will damage the
motherboard!
The USB 2.0 module is purchased separately.
1-14 Chapter 1: Product introduction
6. Front panel audio connector (10-1 pin AAFP)
P5G41-M LX2/GB
P5G41-M LX2/GB front panel audio connector
AAFP
PIN 1
GND
PRESENCE#
SENSE1_RETUR
SENSE2_RETUR
PORT1 L
PORT1 R
PORT2 R
SENSE_SEND
PORT2 L
HD-audio-compliant
pin definition
PIN 1
AGNDNCNC
NC
MIC2
MICPWR
Line out_R
NC
Line out_L
Legacy AC’97
compliant definition
P5G41-M LX2/GB Internal audio connector
CD
Right Audio Channel
GND
GND
Left Audio Channel
P5G41-M LX2/GB
This connector is for a chassis-mounted front panel audio I/O module that supports
either HD Audio or legacy AC`97 audio standard. Connect one end of the front panel
audio I/O module cable to this connector.
• We recommend that you connect a high-denition front panel audio module to this
connector to avail of the motherboard’s high-denition audio capability.
• If you want to connect a high-denition front panel audio module to this connector, set
the Front Panel Type item in the BIOS setup to [HD Audio]. If you want to connect an
AC'97 front panel audio module to this connector, set the item to [AC97]. By default, this
connector is set to [HD Audio]. See section 2.4.2 Chipset for details.
7. Optical drive audio connector (4-pin CD)
These connectors allow you to receive stereo audio input from sound sources such as
a CD-ROM, TV tuner, or MPEG card.
ASUS P5G41-M LX2 Series 1-15
8. System panel connector (10-1 pin F_PANEL)
PIN 1
PWRBTN
PLED+
PLED-
PWR
GND
IDE_LED+
IDE_LED-
Ground
Reset
F_PANEL
PLED
+HDLED RESET
P5G41-M LX2/GB System panel connecto
r
P5G41-M LX2/GB
This connector supports several chassis-mounted functions.
• System power LED (2-pin PLED)
This 2-pin connector is for the system power LED. Connect the chassis power LED
cable to this connector. The system power LED lights up when you turn on the system
power, and blinks when the system is in sleep mode.
•
Hard disk drive activity LED (2-pin +HDLED)
This 2-pin connector is for the HDD Activity LED. Connect the HDD Activity LED cable
to this connector. The HD LED lights up or ashes when data is read from or written to
the HDD.
•
ATX power button/soft-off button (2-pin PWRBTN)
This connector is for the system power button. Pressing the power button turns
the system on or puts the system in sleep or soft-off mode depending on the BIOS
settings. Pressing the power switch for more than four seconds while the system is ON
turns the system OFF.
•
Reset button (2-pin RESET)
This 2-pin connector is for the chassis-mounted reset button for system reboot without
turning off the system power.
1-16 Chapter 1: Product introduction
1.8 Software support
1.8.1 Installing an operating system
This motherboard supports Windows® XP/Vista/7 Operating Systems (OS). Always install the
latest OS version and corresponding updates to maximize the features of your hardware.
• Motherboard settings and hardware options vary. Refer to your OS documentation for
detailed information.
• Ensure that you install Windows
Service Pack 1 or later versions before installing the drivers for better compatibility and
system stability.
1.8.2 Support DVD information
The Support DVD that comes with the motherboard package contains the drivers, software
applications, and utilities that you can install to avail all motherboard features.
The contents of the Support DVD are subject to change at any time without notice. Visit the
ASUS website at www.asus.com for updates.
To run the Support DVD
Place the Support DVD to the optical drive. The DVD automatically displays the Drivers menu
if Autorun is enabled in your computer.
The following screen is for reference only.
®
XP Service Pack 3 or later versions / Windows® Vista
Click an icon to
display Support DVD/
motherboard information
Click an item to install
If Autorun is NOT enabled in your computer, browse the contents of the Support DVD to
locate the le ASSETUP.EXE from the BIN folder. Double-click the ASSETUP.EXE to run
the DVD.
ASUS P5G41-M LX2 Series 1-17
Chapter 2
BIOS information
2.1 Managing and updating your BIOS
Save a copy of the original motherboard BIOS le to a USB ash disk in case you need to
restore the BIOS in the future. Copy the original motherboard BIOS using the ASUS Update
utility.
2.1.1 ASUS Update utility
The ASUS Update is a utility that allows you to manage, save, and update the motherboard
BIOS in Windows® environment.
• ASUS Update requires an Internet connection either through a network or an Internet
Service Provider (ISP).
• This utility is available in the support DVD that comes with the motherboard package.
Installing ASUS Update
To install ASUS Update:
1. Place the support DVD in the optical drive. The
2. Click the
3. Follow the onscreen instructions to complete the installation.
Utilities tab, then click ASUS Update.
Drivers menu appears.
Quit all Windows® applications before you update the BIOS using this utility.
Updating the BIOS
To update the BIOS:
1. From the Windows
ASUSUpdate to launch the ASUS Update utility.
2. From the dropdown list, select any of the updating process:
Updating from the Internet
a. Select Update BIOS from the Internet, then click Next.
b. Select the ASUS FTP site nearest you to avoid network trafc, or click Auto
Select then click
c. From the FTP site, select the BIOS version that you wish to download then click
Next.
ASUS P5G41-M LX2 Series 2-1
®
desktop, click Start > Programs > ASUS > ASUSUpdate >
Next.
The ASUS Update utility is capable of updating itself through the Internet. Always update
the utility to avail all its features.
Updating from a BIOS file
a. Select Update BIOS from a le, then click Next.
b. Locate the BIOS le from the
Open window, then click Open.
3. Follow the onscreen instructions to complete the updating process.
2.1.2 ASUS EZ Flash 2
The ASUS EZ Flash 2 feature allows you to update the BIOS without using an OS-based
utility.
Before you start using this utility, download the latest BIOS le from the ASUS website at
www.asus.com.
To update the BIOS using EZ Flash 2:
1. Insert the USB ash disk that contains the latest BIOS le to the USB port, then launch
EZ Flash 2 in any of these two ways:
• Press
• Enter the BIOS setup program. Go to the
press <Enter> to enable it.
Press
<Alt> + <F2> during POST.
Tools menu to select EZ Flash 2 and
<Tab> to switch between drives until the correct BIOS le is found.
ASUSTek EZ Flash 2 BIOS ROM Utility V3.44
FLASH TYPE: MXIC 25L8005
Current ROM
BOARD: P5G41-M LX2/GB
VER: 0211 (H:00 B:03)
DATE: 09/28/2009
PATH: A:\
A:
Update ROM
BOARD: Unknown
VER: Unknown
DATE: Unknown
Note
[Enter] Select or Load [Tab] Switch [V] Drive Info
[Up/Down/Home/End] Move [B] Backup [ESC] Exit
2. When the correct BIOS le is found, EZ Flash 2 performs the BIOS update process
and automatically reboots the system when done.
• This function supports USB ash disks with FAT 32/16 format and single partition only.
• DO NOT shut down or reset the system while updating the BIOS to prevent system boot
failure!
2-2 Chapter 2: BIOS information
2.1.3 ASUS CrashFree BIOS
The ASUS CrashFree BIOS is an auto recovery tool that allows you to restore the BIOS le
when it fails or gets corrupted during the updating process. You can restore a corrupted BIOS
le using the motherboard support DVD or a removable device that contains the updated
BIOS le.
• The BIOS le in the support DVD may not be the latest version. Download the latest
BIOS le from the ASUS website at www.asus.com.
• The removable devices that ASUS CrashFree BIOS support vary with motherboard
models. For motherboards without the oppy connector, prepare a USB ash disk before
using this utility.
Recovering the BIOS
To recover the BIOS:
1. Turn on the system.
2. Insert the support DVD to the optical drive or the removable device that contains the
BIOS le to the USB port or to the oppy disk drive, if supported.
3. The utility automatically checks the devices for the BIOS le. When found, the utility
reads the BIOS le and starts ashing the corrupted BIOS le.
4. Turn off the system after the utility completes the updating process and turn on again.
DO NOT shut down or reset the system while updating the BIOS! Doing so can cause
system boot failure!
Ensure to load the BIOS default settings to ensure system compatibility and stability. Select
the Load Setup Defaults item under the Exit menu. Refer to section 2.8 Exit menu for
details.
2.2 BIOS setup program
Use the BIOS Setup program to update the BIOS or congure its parameters. The BIOS
screens include navigation keys and brief online help to guide you in using the BIOS Setup
program.
Entering BIOS Setup at startup
To enter BIOS Setup at startup:
• Press <Delete> during the Power-On Self Test (POST). If you do not press <Delete>,
POST continues with its routines.
Entering BIOS Setup after POST
To enter BIOS Setup after POST:
• Press
• Press the reset button on the system chassis.
• Press the power button to turn the system off then back on. Do this option only if you
ASUS P5G41-M LX2 Series 2-3
<Ctrl>+<Alt>+<Del> simultaneously.
failed to enter BIOS Setup using the rst two options.
Using the power button, reset button, or the <Ctrl>+<Alt>+<Del> keys to force reset from
a running operating system can cause damage to your data or system. We recommend to
always shut down the system properly from the operating system.
• The default BIOS settings for this motherboard apply for most conditions to ensure
optimum performance. If the system becomes unstable after changing any BIOS
settings, load the default settings to ensure system compatibility and stability. Select the
Load Setups Default item under the Exit Menu. See section 2.8 Exit Menu.
• The BIOS setup screens shown in this section are for reference purposes only, and may
not exactly match what you see on your screen.
• Visit the ASUS website at www.asus.com to download the latest BIOS le for this
motherboard.
2.3 Main menu
When you enter the BIOS Setup program, the Main menu screen appears, giving you an
overview of the basic system information.
Main Advanced Power Boot Tools Exit
System Time [12:56:38]
System Date [Tue 01/01/2002]
Primary IDE Master :[Not Detected]
Primary IDE Slave :[Not Detected]
SATA 1 :[Not Detected]
SATA 2 :[Not Detected]
SATA 3 :[Not Detected]
SATA 4 :[Not Detected]
StorageConguration
System Information
v02.61 (C)Copyright 1985-2009, American Megatrends, Inc.
BIOS SETUP UTILITY
Use [ENTER], [TAB] or
[SHIFT-TAB] to select
aeld.
Use [+] or [-] to
conguresystemtime.
Select Screen
Select Item
+- Change Field
Tab Select Field
F1 General Help
F10 Save and Exit
ESC Exit
2.3.1 System Time [xx:xx:xx]
Allows you to set the system time.
2.3.2 System Date [Day xx/xx/xxxx]
Allows you to set the system date.
2.3.3 Primary IDE Master/Slave, SATA1~4
While entering Setup, the BIOS automatically detects the presence of IDE/SATA devices.
There is a separate sub-menu for each IDE/SATA device. Select a device item then press
<Enter> to display the IDE/SATA device information.
The BIOS automatically detects the values opposite the dimmed items (Device, Vendor, Size,
LBA Mode, Block Mode, PIO Mode, Async DMA, Ultra DMA, and SMART monitoring). These
values are not user-congurable. These items show Not Detected if no IDE/SATA device is
installed in the system.
2-4 Chapter 2: BIOS information
Type [Auto]
Selects the type of IDE drive. Setting to Auto allows automatic selection of the appropriate
IDE device type. Select CDROM if you are specically conguring a CD-ROM drive. Select
ARMD (ATAPI Removable Media Device) if your device is either a ZIP, LS-120, or MO drive.
Conguration options: [Not Installed] [Auto] [CDROM] [ARMD]
This item does not appear when you select the SATA 1/2/3/4 devices.
LBA/Large Mode [Auto]
Enables or disables the LBA mode. Setting to [Auto] enables the LBA mode if the device
supports this mode, and if the device was not previously formatted with LBA mode disabled.
Conguration options: [Disabled] [Auto]
Block (Multi-sector Transfer) M [Auto]
Enables or disables data multi-sectors transfers. When set to [Auto], the data transfer from
and to the device occurs multiple sectors at a time if the device supports multi-sector transfer
feature. When set to [Disabled], the data transfer from and to the device occurs one sector
at a time. Conguration options: [Disabled] [Auto]
PIO Mode [Auto]
Selects the PIO mode. Conguration options: [Auto] [0] [1] [2] [3] [4]
DMA Mode [Auto]
Selects the DMA mode. Conguration options: [Auto]
SMART Monitoring [Auto]
Sets the Smart Monitoring, Analysis, and Reporting Technology.
Conguration options: [Auto] [Disabled] [Enabled]
32Bit Data Transfer [Enabled]
Enables or disables 32-bit data transfer. Conguration options: [Disabled] [Enabled]
2.3.4 Storage Conguration
The items in this menu allow you to set or change the congurations for the SATA devices
installed in the system. Select an item then press <Enter> if you want to congure the item.
ATA/IDE Conguration [Enhanced]
Allows you to set the ATA/IDE conguration.
Conguration options: [Disabled] [Compatible] [Enhanced]
Enhanced Mode Support On [S-ATA]
Sets Serial ATA, Parallel ATA or both as native mode.
Conguration options: [S-ATA+P-ATA] [S-ATA] [P-ATA].
IDE Detect Time Out (Sec) [35]
Selects the time out value for detecting ATA/ATAPI devices.
Conguration options: [0] [5] [10] [15] [20] [25] [30] [35]
ASUS P5G41-M LX2 Series 2-5
2.3.5 System Information
This menu gives you an overview of the general system specications. The BIOS
automatically detects the items in this menu.
BIOS Information
Displays the auto-detected BIOS information.
Processor
Displays the auto-detected CPU specication.
System Memory
Displays the auto-detected system memory.
2.4 Advanced menu
The Advanced menu items allow you to change the settings for the CPU and other system
devices.
Take caution when changing the settings of the Advanced menu items. Incorrect eld
values can cause the system to malfunction.
Main Advanced Power Boot Tools Exit
CPUConguration
Chipset
OnboardDevicesConguration
USBConguration
PCIPnP
BIOS SETUP UTILITY
CongureCPU.
2-6 Chapter 2: BIOS information
2.4.1 CPU Conguration
The items in this menu show the CPU-related information that the BIOS automatically
detects.
Ratio CMOS Setting [Auto]
Sets the ration between CPU core clock and the FSB frequency. Conguration option: [Auto]
• If an invalid ratio is set in CMOS then actual and set values may differ.
• Key in ratio numbers directly.
C1E Support [Enabled]
Allows you to enable or disable C1E Support. Conguration options: [Disabled] [Enabled]
Max CPUID Value Limit [Disabled]
Setting this item to [Enabled] allows legacy operating systems to boot even without support
for CPUs with extended CPUID functions. Conguration options: [Disabled] [Enabled]
Intel(R) Virtualization Tech [Enabled]
Enables or disables Intel® Virtualization Technology. Virtualization enhanced by Intel®
Virtualization Technology allows a platform to run multiple operating systems and applications
in independent partitions. With virtualization, one computer system can function as multiple
virtual systems. Conguration options: [Enabled] [Disabled]
CPU TM Function [Enabled]
Enables or disables Intel® CPU Thermal Monitor (TM) function, a CPU overheating
protection function. When enabled, the CPU core frequency and voltage are reduced when
the CPU overheats. Conguration options: [Disabled] [Enabled]
Execute-Disable Bit Capability [Enabled]
Allows you to enable or disable the No-Execution Page Protection Technology. Setting this
item to [Disabled] forces the XD feature ag to always return to zero (0).
Conguration options: [Disabled] [Enabled]
The following item appears only when you installed an Intel® Pentium® 4 or later CPU that
supports the Enhanced Intel SpeedStep® Technology (EIST).
Intel(R) SpeedStep(TM) Tech [Enabled]
Allows you to use the Enhanced Intel® SpeedStep® Technology. When set to [Enabled], you
can adjust the system power settings in the operating system to use the EIST feature. Set this
item to [Disabled] if you do not want to use the EIST.
Conguration options: [Enabled] [Disabled]
ASUS P5G41-M LX2 Series 2-7
2.4.2 Chipset
The Chipset menu allows you to change the advanced chipset settings. Select an item then
press <Enter> to display the sub-menu.
North Bridge Conguration
Memory Remap Feature [Enabled]
Allows you to enable or disable the remapping of overlapped PCI memory above the total
physical memory. Conguration options: [Enabled] [Disabled]
Congure DRAM Timing by SPD [Enabled]
Allows you to enable or disable congurating DRAM Timing by SPD.
Conguration options: [Enabled] [Disabled]
Initiate Graphic Adapter [PEG/PCI]
Allows you to select the graphics controller as the primary boot device.
Conguration options: [IGD] [PCI/IGD] [PCI/PEG] [PEG/IGD] [PEG/PCI]
IGD Graphics Mode Select [Enabled, 32MB]
Allows you to select the amout of system memory used by the Internal graphics device.
Conguration options: [Disabled] [Enabled, 32MB] [Enabled, 64MB] [Enabled, 128MB]
GTT Graphics Memory Size [No VT mode, 2MB]
This item is not user- congurable.
DVMT Memory [256MB]
Allows you to select the DVMT memory.
Conguration options: [128MB] [256MB] [Maximum DVMT]
The [Maximum DVMT] option only appears when installing 1GB DDR2 DIMMs into the
DIMM sockets.
Protect Audio Video Path Mode [Lite]
This item is not user- congurable.
South Bridge Conguration
Audio Controller [Enabled]
Allows you to set the audio controller. Conguration options: [Enabled] [Disabled]
Front Panel Type [HD Audio]
Allows you to select the front panel support type. If High Denition Audio Front Panel
used, set this item to [HD Audio] mode. Conguration options: [AC97] [HD Audio]
Onboard Gigabit LAN [Enabled]
Allows you to enable or disable the onboard Gigabit LAN controller.
Conguration options: [Enabled] [Disabled]
Onboard LAN Boot ROM [Disabled]
Allows you to enable or disable the boot ROM in the onboard LAN controller. This item
appears only when the Onboard LAN item is set to Enabled.
Conguration options: [Disabled] [Enabled]
2-8 Chapter 2: BIOS information
2.4.3 Onboard Devices Conguration
Serial Port1 Address [3F8/IRQ4]
Allows you to select the Serial Port1 base address.
Conguration options: [Disabled] [3F8/IRQ4] [2F8/IRQ3] [3E8/IRQ4] [2E8/IRQ3]
2.4.4 USB Conguration
The items in this menu allows you to change the USB-related features. Select an item then
press <Enter> to display the conguration options.
The Module Version and USB Devices Enabled items show the auto-detected values. If no
USB device is detected, the item shows None.
USB Functions [Enabled]
Allows you to disable or enable the USB functions.
Conguration options: [Disabled] [Enabled]
USB 2.0 Controller [Enabled]
Allows you to enable or disable USB 2.0 controller.
Conguration options: [Enabled] [Disabled]
Legacy USB Support [Auto]
Allows you to enable or disable support for Legacy USB storage devices, including USB ash
drives and USB hard drives. Setting to [Auto] allows the system to detect the presence of
USB devices at startup. If detected, the USB controller legacy mode is enabled. If no USB
device is detected, the legacy USB support is disabled.
Conguration options: [Disabled] [Enabled] [Auto]
USB 2.0 Controller Mode [HiSpeed]
Allows you to congure the USB 2.0 controller in HiSpeed (480Mbps) or Full Speed
(12Mbps). Conguration options: [FullSpeed] [HiSpeed]
The following items may only appear when a USB storage device is plugged.
USB Mass Storage Device Conguration
USB Mass Storage Reset Delay [20 Sec]
Allows you to set the maximum time that the BIOS waits for the USB storage device to
initialize. Conguration options: [10 Sec] [20 Sec] [30 Sec] [40 Sec]
Emulation Type [Auto]
Allows you to select the emulation type. Conguration options: [Auto] [Floppy] [Forced
FDD] [Hard Disk] [CDROM]
ASUS P5G41-M LX2 Series 2-9
2.4.5 PCI PnP
The PCI PnP menu items allow you to change the advanced settings for PCI/PnP devices.
The menu includes setting IRQ and DMA channel resources for either PCI/PnP or legacy ISA
devices, and setting the memory size block for legacy ISA devices.
Take caution when changing the settings of the PCI PnP menu items. Incorrect eld values
can cause the system to malfunction.
Plug and Play O/S [No]
When set to [No], BIOS congures all the devices in the system. When set to [Yes] and if you
install a Plug and Play operating system, the operating system congures the Plug and Play
devices not required for boot. Conguration options: [No] [Yes]
2.5 Power menu
The Power menu items allow you to change the settings for the Advanced Power
Management (APM). Select an item then press <Enter> to display the conguration options.
Main Advanced Power Boot Tools Exit
Suspend Mode [Auto]
ACPI 2.0 Support [Enabled] ACPI APIC Support [Enabled]
APMConguration
Hardware Monitor
2.5.1 Suspend Mode [Auto]
Allows you to select the Advanced Conguration and Power Interface (ACPI) state to be used
for system suspend. Conguration options: [S1 (POS) Only] [S3 Only] [Auto]
BIOS SETUP UTILITY
Select the ACPI state
used for System
Suspend.
2.5.2 ACPI 2.0 Support [Enabled]
Allows you to add more tables for Advanced Conguration and Power Interface (ACPI) 2.0
specications. Conguration options: [Disabled] [Enabled]
2.5.3 ACPI APIC Support [Enabled]
Allows you to enable or disable the Advanced Conguration and Power Interface (ACPI)
support in the Application-Specic Integrated Circuit (ASIC). When set to Enabled, the ACPI
APIC table pointer is included in the RSDT pointer list. Conguration options: [Disabled]
[Enabled]
2-10 Chapter 2: BIOS information
2.5.4 APM Conguration
Restore on AC Power Loss [Power Off]
When set to [Power Off], the system goes into off state after an AC power loss. When set
to [Power On], the system goes on after an AC power loss. When set to [Last State], the
system goes into either off or on state, whatever the system state was before the AC power
loss. Conguration options: [Power Off] [Power On] [Last State]
Power On By RTC Alarm [Disabled]
Allows you to enable or disable RTC to generate a wake event. When this item is set to
Enabled, the items RTC Alarm Date, RTC Alarm Hour, RTC Alarm Minute, and RTC Alarm
Second appear with set values. Conguration options: [Disabled] [Enabled]
Power On By External Modem [Disabled]
Allows you to enable or disable RI to generate a wake event.
Conguration options: [Disabled] [Enabled]
Power On by PCI(E) Device [Disabled]
When set to [Enabled], this parameter allows you to wake the system through a PCI/PCIe
device. This feature requires an ATX power supply that provides at least 1A on the +5VSB
lead. Conguration options: [Disabled] [Enabled]
Power On By PS/2 Keyboard [Disabled]
Allows you to enable or disable the PS/2 keyboard to generate a wake event. This feature
requires an ATX power supply that provides at least 1A on the +5VSB lead. Conguration
options: [Disabled] [Space Bar] [Power Key] [Ctrl-Esc]
Power On By PS/2 Mouse [Disabled]
Allows you to enable or disable the PS/2 mouse to generate a wake event. This feature
requires an ATX power supply that provides at least 1A on the +5VSB lead. Conguration
options: [Disabled] [Enabled]
2.5.5 Hardware Monitor
CPU Temperature [xxxºC/xxxºF] or [Ignored]
MB Temperature [xxxºC/xxxºF] or [Ignored]
The onboard hardware monitor automatically detects and displays the motherboard and CPU
temperatures. Select Ignored if you do not wish to display the detected temperatures.
CPU/Chassis Fan Speed [xxxxRPM] or [Ignored]
The onboard hardware monitor automatically detects and displays the CPU/chassis fan
speed in rotations per minute (RPM). If the fan is not connected to the motherboard, the eld
shows N/A. Select Ignored if you do not wish to display the detected speed.
VCORE Voltage, 3.3V Voltage, 5V Voltage, 12V Voltage [xxxV] or [Ignored]
The onboard hardware monitor automatically detects the voltage output through the onboard
voltage regulators.
CPU Q-Fan Function [Disabled]
Allows you to enable or disable the CPU’s Q-Fan function. Conguration options: [Disabled]
[Enabled]
ASUS P5G41-M LX2 Series 2-11
2.6 Boot menu
The Boot menu items allow you to change the system boot options. Select an item then
press <Enter> to display the sub-menu.
Main Advanced Power Boot Tools Exit
Boot Settings
Boot Device Priority
BootSettingsConguration
Security
2.6.1 Boot Device Priority
1st ~ xxth Boot Device
These items specify the boot device priority sequence from the available devices. The
number of device items that appears on the screen depends on the number of devices
installed in the system. Conguration options: [Removable Dev.] [Hard Drive]
[ATAPI CD-ROM] [Disabled]
• To select the boot device during system startup, press <F8> when ASUS Logo appears.
• To access Windows
• Press <F5> when ASUS Logo appears.
• Press <F8> after POST.
2.6.2 Boot Settings Conguration
Quick Boot [Enabled]
Enabling this item allows the BIOS to skip some power on self tests (POST) while booting to
decrease the time needed to boot the system. When set to [Disabled], BIOS performs all the
POST items. Conguration options: [Disabled] [Enabled]
Full Screen Logo [Enabled]
This allows you to enable or disable the full screen logo display feature. Conguration
options: [Disabled] [Enabled]
BIOS SETUP UTILITY
SpeciestheBoot
Device Priority
sequence.
Avirtualoppydisk
drive (Floppy Drive B:
) may appear when you
set the CD-ROM drive
astherstboot
device.
®
OS in Safe Mode, do any of the following:
Set this item to [Enabled] to use the ASUS MyLogo2™ feature.
AddOn ROM Display Mode [Force BIOS]
Sets the display mode for option ROM. Conguration options: [Force BIOS] [Keep Current]
Bootup Num-Lock [On]
Allows you to select the power-on state for the NumLock.
Conguration options: [Off] [On]
Wait For ‘F1’ If Error [Enabled]
When set to Enabled, the system waits for the F1 key to be pressed when error occurs.
Conguration options: [Disabled] [Enabled]
2-12 Chapter 2: BIOS information
Hit ‘DEL’ Message Display [Enabled]
When set to [Enabled], the system displays the message Press DEL to run Setup during
POST. Conguration options: [Disabled] [Enabled]
2.6.3 Security
The Security menu items allow you to change the system security settings. Select an item
then press <Enter> to display the conguration options.
Change Supervisor Password
Select this item to set or change the supervisor password. The Supervisor Password item
on top of the screen shows the default Not Installed. After you set a password, this item
shows Installed.
To set a Supervisor Password:
1. Select the
2. In the password box, key in a password containing up to six letters or numbers, or
both, then press
3. Conrm the password when prompted.
The message
To change the supervisor password, follow the same steps in setting a supervisor password.
To clear the supervisor password, select the
<Enter> twice. The message Password uninstalled appears.
After you have set a supervisor password, the other items appear to allow you to change
other security settings.
User Access Level [Full Access]
This item allows you to select the access restriction to the Setup items.
Conguration options: [No Access] [View Only] [Limited] [Full Access]
[No Access] - prevents user access to the Setup utility.
[View Only] - allows access but does not allow change to any eld.
[Limited] - allows changes only to selected elds, such as Date and Time.
[Full Access] - allows viewing and changing all the elds in the Setup utility.
Change User Password
Select this item to set or change the user password. The User Password item on top of the
screen shows the default Not Installed. After you set a password, this item shows Installed.
To set a User Password:
1. Select the
2. In the password box, key in a password containing up to six letters or numbers, or
both, then press
3. Conrm the password when prompted.
The message
To change the user password, follow the same steps in setting a user password.
Change Supervisor Password item and press <Enter>.
<Enter>.
Password Installed appears after you successfully set your password.
Change Supervisor Password then press
If you forget your BIOS password, you can clear it by erasing the CMOS Real Time Clock
(RTC) RAM. See section 1.6 Jumpers for information on how to erase the RTC RAM.
Change User Password item and press <Enter>.
<Enter>.
Password Installed appears after you set your password successfully.
ASUS P5G41-M LX2 Series 2-13
Clear User Password
Exit system setup
after saving the
changes.
F10 key can be used
for this operation.
Select this item to clear the user password.
Password Check [Setup]
When set to [Setup], BIOS checks for user password when accessing the Setup utility. When
set to [Always], BIOS checks for user password both when accessing Setup and booting the
system. Conguration options: [Setup] [Always]
2.7 Tools menu
The Tools menu items allow you to congure options for special functions. Select an item
then press <Enter> to display the sub-menu.
Main Advanced Power Boot Tools Exit
ASUS EZ Flash 2
BIOS SETUP UTILITY
Press ENTER to run
the utility to select
and update BIOS.
This utility supports
1.FAT 12/16/32 (r/w)
2.NTFS (read only)
3.CD-DISC (read only)
2.7.1 ASUS EZ Flash 2
Allows you to run ASUS EZ Flash 2. When you press <Enter>, a conrmation message
appears. Use the left/right arrow key to select between [Yes] or [No], then press <Enter> to
conrm your choice. See section 2.1.2 ASUS EZ Flash 2 for details.
2.8 Exit menu
The Exit menu items allow you to load the optimal or failsafe default values for the BIOS
items, and save or discard your changes to the BIOS items.
Main Advanced Power Boot Tools Exit
Exit Options
Exit & Save Changes
Exit & Discard Changes
Discard Changes
Load Setup Defaults
Pressing <Esc> does not immediately exit this menu. Select one of the options from this
menu or <F10> from the legend bar to exit.
2-14 Chapter 2: BIOS information
BIOS SETUP UTILITY
Exit system setup
after saving the
changes.
F10 key can be used
for this operation.
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