Asus M4A78-EM User Manual
M4A78-EM/1394
Motherboard
E4623
First Edition V1
April 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 ......................................................................................................... vi
Safety information ..................................................................................... vii
About this guide ........................................................................................ vii
M4A78-EM/1394 specications summary ................................................. ix
Chapter 1: Product introduction
1.1 Welcome! ...................................................................................... 1-1
1.2 Package contents .........................................................................
1.3 Special features ............................................................................
1.3.1 Product highlights ...........................................................
1.3.2 Innovative ASUS features ...............................................
1.4 Before you proceed .....................................................................
1.5 Motherboard overview .................................................................
1.5.1 Placement direction ........................................................
1.5.2 Screw holes ....................................................................
1.5.3 Motherboard layout .........................................................
1.5.4 Layout contents ...............................................................
1.6 Central Processing Unit (CPU) ...................................................
1.6.1 Installing the CPU ...........................................................
1.6.2 Installing the heatsink and fan ......................................
1.7 System memory .........................................................................
1.7.1 Overview ........................................................................
1.7.2 Memory congurations ..................................................
1.7.3 Installing a DIMM ..........................................................
1.7.4 Removing a DIMM ........................................................
1.8 Expansion slots ..........................................................................
1.8.1 Installing an expansion card .........................................
1.8.2 Conguring an expansion card .....................................
1.8.3 PCI slots ........................................................................
1.8.4 PCI Express x1 slot .......................................................
1.8.5 PCI Express x16 slot .....................................................
1.9 Jumpers ......................................................................................
1.10 Connectors .................................................................................
1.10.1 Rear panel ports ...........................................................
1.10.2 Internal connectors .......................................................
1-1
1-1
1-1
1-3
1-5
1-6
1-6
1-6
1-7
1-7
1-8
1-8
1-10
1-11
1-11
1-12
1-16
1-16
1-17
1-17
1-17
1-17
1-17
1-17
1-18
1-19
1-19
1-22
iii
Contents
1.11 Software support ........................................................................ 1-29
1.11.1 Installing an operating system ......................................
1.11.2 Support DVD information ..............................................
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 utility ...................................................
2.1.3 ASUS CrashFree BIOS 3 utility ......................................
2.2 BIOS setup program ....................................................................
2.2.1 BIOS menu screen ..........................................................
2.2.2 Menu bar .........................................................................
2.2.3 Navigation keys ...............................................................
2.2.4 Menu items .....................................................................
2.2.5 Submenu items ...............................................................
2.2.6 Conguration elds .........................................................
2.2.7 Pop-up window ...............................................................
2.2.8 Scroll bar .........................................................................
2.2.9 General help ...................................................................
2.3 Main menu ....................................................................................
2.3.1 System Time ...................................................................
2.3.2 System Date ...................................................................
2.3.3 Primary IDE Master/Slave, SATA 1/2/3/5/6, E-SATA .......
2.3.4 SATA Conguration .........................................................
2.3.5 System Information .........................................................
2.4 Advanced menu ...........................................................................
2.4.1 JumperFree Conguration ..............................................
2.4.2 CPU Conguration .........................................................
2.4.3 Chipset ...........................................................................
2.4.4 Onboard Devices Conguration ....................................
2.4.5 PCI PnP ........................................................................
2.4.6 USB Conguration ........................................................
2.5 Power menu ................................................................................
2.5.1 Suspend Mode ..............................................................
2.5.2 ACPI 2.0 Support ..........................................................
1-29
1-29
2-1
2-2
2-3
2-4
2-5
2-5
2-5
2-6
2-6
2-6
2-6
2-6
2-6
2-7
2-7
2-7
2-7
2-8
2-8
2-9
2-9
2-11
2-11
2-13
2-13
2-14
2-14
2-15
2-15
iv
Contents
2.5.3 ACPI APIC Support ....................................................... 2-15
2.5.4 APM Conguration ........................................................
2.5.5 HW Monitor Conguration .............................................
2.6 Boot menu ..................................................................................
2.6.1 Boot Device Priority ......................................................
2.6.2 Boot Settings Conguration ..........................................
2.6.3 Security .........................................................................
2.7 Tools menu .................................................................................
2.7.1 ASUS EZ Flash 2 ..........................................................
2.7.2 Express Gate ................................................................
2.7.3 AI NET 2
2.8 Exit menu ....................................................................................
........................................................................ 2-19
2-15
2-16
2-16
2-17
2-17
2-17
2-19
2-19
2-19
2-20
v
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.
vi
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.
vii
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>
viii
M4A78-EM/1394 specications summary
CPU AMD® Phenom™ X4 / Phenom™ X3 / Athlon™ X2 /
Chipset AMD® 780G / SB710
Front side bus Up to 5200MT/s HyperTransport™ 3.0 interface for
Memory Dual channel memory architecture
Graphics Integrated ATI Radeon™ HD 3200 GPU
Athlon™ / Sempron™ processors (socket AM2+/AM2)
Compatible with Phenom™ II / Athlon™ X4 / Athlon™ X3 /
Athlon™ X2 processors (AM3 CPU)
Supports 45nm CPU
AMD Cool ‘n’ Quiet™ 2.0 Technology (depends on CPU
type)
Supports CPU up to 125W
* Refer to www.asus.com for the AMD CPU support list
AM3 / AM2+ CPU
2000 / 1600MT/s for AM2 CPU
- 4 x 240-pin DIMM sockets support unbuffered ECC
and non-ECC 1200(O.C.)/1066/800/667 MHz
DDR2 memory modules
- Supports up to 16GB system memory
* DDR2 1200(O.C.)/1066 is supported by AM2+ / AM3 CPU
only.
** We recommend that you install the DDR2 1200 memory
modules on the yellow slots for better performance.
*** Refer to www.asus.com or this user manual for the
Memory QVL (Qualied Vendors List).
**** When you install a total memory of 4GB capacity
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.
Supports HDMI™ with max. resolution up to
1920x1200 (1080P)
Supports DVI-D (HDCP compliant) with max. resolution up to
2560x1600@60Hz dual-link
Supports RGB with max. resolution up to 2048x1536@85Hz
Supports Hybrid CrossFireX™ (for Windows® Vista only)
Dual VGA output supports:
RGB & DVI
RGB & HDMI
Maximum shared memory up to 256MB
* Refer to www.amd.com for the discrete GPUs which
support Hybrid CrossFireX™.
** The minimum system requirements of playing HD-DVD
and Blu-ray disc: Graphics shared memory of 256MB /
Dual-Core CPU / 1GB dual-channel DDR2 667 or
single-channel DDR2 800
(continued on the next page)
ix
M4A78-EM/1394 specications summary
Expansion slots 1 x PCIe x16 slot
Storage / RAID AMD® SB710 southbridge:
Audio Realtek® ALC887 High Denition Audio 8-channel CODEC
USB Supports up to 12 USB 2.0/1.1 ports (6 ports at mid-board,
LAN PCIe Gigabit LAN
ASUS special features ASUS Q-Fan
ASUS overclocking
features
Back panel I/O ports 1 x PS/2 Keyboard / Mouse Combo port
1 x PCIe x1 slot
2 x PCI slots
- 1 x UltraDMA 133/100/66 connector
- 5 x Serial ATA 3Gb/s connectors support RAID 0,
RAID 1, and RAID 0+1 congurations (for Windows®
Vista only)
- 1 x eSATA 3Gb/s port supports JBOD
Supports Jack-detect and Multi-streaming technologies
Supports S/PDIF_OUT interface
6 ports at the back panel)
ASUS CrashFree BIOS3
ASUS EZ Flash2
ASUS MyLogo2
ASUS Express Gate
ASUS AI NET2
ASUS EPU-4 Engine
ASUS Turbo Key
SFS (Stepless Frequency Selection) from 200MHz to
550MHz at 1MHz increment
ASUS C.P.R. (CPU Parameter Recall)
1 x Optical S/PDIF_OUT port
1 x IEEE 1394a port
1 x VGA port
1 x HDMI port
1 x DVI port
1 x eSATA port
1 x LAN (RJ-45) port
6 x USB 2.0/1.1 ports
8-channel audio ports
(continued on the next page)
x
M4A78-EM/1394 specications summary
Internal I/O connectors 3 x USB 2.0 connectors support additional 6 USB 2.0 ports
BIOS 8Mb Flash ROM, AMI BIOS, PnP, DMI v2.0, WfM2.0,
Accessories 1 x Serial ATA cable
Support DVD Drivers
Form factor MicroATX form factor: 9.6 in x 9.6 in (24.4 cm x 24.4 cm)
*Specications are subject to change without notice.
1 x IDE connector
1 x COM connector
1 x LPT connector
1 x IEEE 1394a connector
5 x SATA connectors
1 x High denition front panel audio connector
1 x CD audio-in connector
1 x S/PDIF out connector
1 x CPU fan connector
1 x Power fan connector
1 x Chassis fan connector
1 x System panel connector
1 x 24-pin EATX power connector
1 x 4-pin ATX 12V power connector
ACPI v2.0a, SM BIOS 2.5
1 x UltraDMA 133/100/66 cable
1 x I/O shield
1 x User Manual
ASUS PC Probe II
ASUS LiveUpdate Utility
Anti-Virus software (OEM version)
xi
xii
Chapter 1
Product introduction
1.1 Welcome!
Thank you for buying an ASUS® M4A78-EM/1394 motherboard!
The motherboard delivers a host of new features and latest technologies, making it another
standout in the long line of ASUS quality motherboards!
Before you start installing the motherboard, and hardware devices on it, check the items in
your package with the list below.
1.2 Package contents
Check your motherboard package for the following items.
Motherboard ASUS M4A78-EM/1394 motherboard
Cables 1 x Serial ATA cable
1 x UltraDMA 133/100/66 cable
Accessories 1 x I/O shield
Application DVD ASUS motherboard Support DVD
Documentations User Manual
If any of the above items is damaged or missing, contact your retailer.
1.3 Special features
1.3.1 Product highlights
AMD® Phenom™ II / Athlon™ x4 / Athlon™ x3 / Athlon™ x2
ASUS M4A78-EM/1394 1-1
AM3 CPU support
This motherboard supports AMD® AM3 multi-core processors with unique
L3 cache and delivers better overclocking capabilities with less power
consumption. It features dual-channel DDR2 1066 memory support and
accelerates data transfer rate up to 5200MT/s via HyperTransport™ 3.0-
based system bus. This motherboard also supports AMD® CPUs in the
new 45nm manufacturing process.
AMD® Phenom™ x4 / Phenom™ x3 / Athlon™ x2 / Athlon™ /
Sempron™ processors (socket AM2+/AM2)
This motherboard supports AMD® Socket AM2+ multi-core processors. It
features dual-channel DDR2 1066 memory support and accelerates data
transfer rate up to 5200MT/s via HyperTransport™ 3.0-based system
bus. It also supports AMD® Cool ‘n’ Quiet Technology.
AMD® 780G chipset
The AMD 780G Northbridge is an AMD chipset designed for both HT1.0
and HT 3.0 interface speed. It features the future mainstream Hybrid
CrossFire technology that signicantly optimizes your 3D performance.
HyperTransport™ 3.0 support
HyperTransport™ 3.0 technology provides 2.6 times more bandwidth
than HT1.0 that radically improves system efciency for a smoother and
faster computing environment.
AMD Cool ‘n’ Quiet Technology
This motherboard supports the AMD Cool ‘n’ Quiet technology which
monitors system operation and automatically adjusts CPU voltage and
frequency for a cool and quiet operating environment.
Dual channel DDR2 1200(O.C.) support
To attain top performance, ASUS engineers have successfully unleashed
DDR2 1200(O.C.) MHz to meet the higher bandwidth requirements
of the latest operating system, 3D graphics, multimedia, and Internet
applications.
• Due to AM3/AM2+ CPU limitation, only one DDR2 1200/1066 DIMM is supported per
channel. When four DDR2 1200/1066 DIMMs are installed, all DIMMs run at 800MHz
frequency by default for system stability.
• We recommend that you install the DDR2 1200 memory modules on the yellow slots
for better performance.
• Ensure that you download the latest BIOS version at www.asus.com and purchase
the memory modules on the ASUS ofcial Memory Qualied Vendors Lists (QVL).
Hybrid CrossFireX support
ATI Hybrid CrossFireX™ technology greatly boosts graphics performance
with an onboard GPU and a discrete graphics card.
• Hybrid CrossFireX is supported by Windows® Vista OS only.
• Refer to
www.amd.com for the discrete GPUs which support Hybrid CrossFireX™.
Chapter 1: Product introduction1-2
IEEE 1394a support
IEEE 1394a interface provides high speed digital interface for audio /
video appliances such as digital television, digital video camcorders,
storage peripherials and other portable devices.
64-bit CPU support
64-bit computing, the next generation technology that replaces the
current 32-bit architecture, delivers advanced system performance, faster
memory access, and increased productivity. This motherboard provides
excellent compatibility and exibility by supporting both 64-bit and 32-bit
architecture.
Gigabit LAN solution
The onboard LAN controller is a highly integrated Gb LAN controller. It is
enhanced with an ACPI management function to provide efcient power
management for advanced operating systems.
Serial ATA 3Gb/s technology and SATA-On-The-Go
This motherboard supports hard drives based on the Serial ATA (SATA)
3Gb/s storage specication, delivering enhanced scalability and doubling
the bus bandwidth for high-speed data retrieval and save. The external
SATA port provides smart setup and hot-plug functions for easy data
backup to external devices.
8-channel high denition audio
The onboard 8-channel HD audio (High Denition Audio, previously
codenamed Azalia) CODEC enables high-quality 192KHz/24-bit audio
output and jack-detect feature that automatically detects and identies
what types of peripherals are plugged into the audio I/O jacks and noties
users of inappropriate connection, which means there will be no more
confusion of Line-in, Line-out, and Mic jacks.
1.3.2 Innovative ASUS features
ASUS Express Gate
Express Gate is a unique OS built into the motherboard. Five seconds
after bootup, you can instantly surf the Internet without entering the
Windows® OS.
• The actual boot time depends on the system conguration.
• ASUS Express Gate supports le uploading from SATA HDDs, ODDs and USB drives
and downloading to USB drives only.
• Express Gate complies with the OpenGL standard. Refer to
for Express Gate source codes.
ASUS M4A78-EM/1394 1-3
http://support.asus.com
ASUS MyLogo2™
This feature allows you to convert your favorite photo into a 256-color
boot logo for a more colorful and vivid image on your screen.
ASUS CrashFree BIOS 3
ASUS CrashFree BIOS 3 is an auto-recovery tool that allows you to
restore a corrupted BIOS le using the bundled support DVD or a USB
ash disk that contains the BIOS le.
ASUS EZ Flash 2
ASUS EZ Flash 2 is a utility that allows you to update the BIOS without
using an OS-based utility.
ASUS Q-Fan
ASUS Q-Fan technology intelligently adjusts CPU fan speeds according
to system loading to ensure a quiet, cool, and efcient operation.
ASUS EPU
ASUS EPU is a unique power saving technology that detects the current
system loadings and adjusts the power consumption in real time.
Turbo Key
ASUS Turbo Key allows you to turn the PC power button into a physical
overclocking button. After the easy setup, Turbo Key can boost
performances without interrupting ongoing work or games—with just one
touch!
ASUS AI NET2
ASUS AI NET2 remotely detects the cable connection immediately after
turning on the system, and any faulty cable connections are reported
back up to 100 meters at 1 meter accuracy.
Green ASUS
This motherboard and its packaging comply with the European Union’s
Restriction on the use of Hazardous Substances (RoHS). This is in line
with the ASUS vision of creating environment-friendly and recyclable
products/packaging to safeguard consumers’ health while minimizing the
impact on the environment.
C.P.R. (CPU Parameter Recall)
The BIOS C.P.R. feature automatically restores the CPU default settings
when the system hangs due to overclocking failure. C.P.R. eliminates the
need to open the system chassis and clear the RTC data. Simply shut
down and reboot the system, and the BIOS automatically restores the
CPU parameters to their default settings.
Chapter 1: Product introduction1-4
1.4 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, switch off the ATX power supply and
detach its power cord. 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 should 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 M4A78-EM/1394 1-5
1.5 Motherboard overview
1.5.1 Placement direction
When installing the motherboard, ensure that you place it into the chassis in the correct
orientation. The edge with external ports goes to the rear part of the chassis as indicated in
the image below.
1.5.2 Screw holes
Place eight 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.
Place this side towards
the rear of the chassis.
Chapter 1: Product introduction1-6
1.5.3 Motherboard layout
1.5.4 Layout contents
Connectors/Jumpers/Slots/LED Page Connectors/Jumpers/Slots/LED Page
1. IEEE 1394a port connector (10-1 pin IE1394_1) 1-25 10. Clear RTC RAM (3-pin CLRTC) 1-18
2. ATX power connectors (24-pin EATXPWR,
4-pin ATX12V)
3. CPU Socket AM2+
4. DDR2 DIMM slots
5. CPU, power, and chassis fan connectors
(4-pin CPU_FAN, 3-pin PWR_FAN,
and 3-pin CHA_FAN)
6. LPT connector (26-1 pin LPT)
7. Serial port connector (10-1 pin COM1)
8. IDE connector (40-1 pin PRI_IDE)
9. System panel connector (20-8 pin PANEL)
ASUS M4A78-EM/1394 1-7
1-23 11. Onboard LED (SB_PWR) 1-5
1-8 12. SATA connectors (7-pin SATA1, SATA2,
SATA3, SATA5, SATA6)
1-11 13. USB connectors (10-1 pin USB78, USB910,
USB1112)
1-22 14. Digital audio connector (4-1 pin SPDIF_OUT) 1-27
1-23 15. Front panel audio connector (10-1 pin AAFP) 1-27
1-22 16. Optical drive audio connector (4-pin CD) 1-26
1-24 17. PCI / PCIe x 1 / PCIe x 16 slots 1-17
1-28
1-25
1-26
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