This publication, including all photographs, illustrations and software, is protected under
international copyright laws, with all rights reserved. Neither this manual, nor any of the
material contained herein, may be reproduced without written consent of the author.
Version 3.1
Disclaimer
The information in this document is subject to change without notice. The manufacturer
makes no representations or warranties with respect to the contents hereof and specifically
disclaims any implied warranties of merchantability or fitness for any particular purpose.
The manufacturer reserves the right to revise this publication and to make changes from
time to time in the content hereof without obligation of the manufacturer to notify any
person of such revision or changes.
Trademark Recognition
Microsoft, MS-DOS and Windows are registered trademarks of Microsoft Corp.
MMX, Pentium, Pentium-II, Pentium-III, Celeron are registered trademarks of Intel Cor-
poration.
Other product names used in this manual are the properties of their respective owners and
are acknowledged.
Federal Communications Commission (FCC)
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 the 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 the receiver
•Connect the equipment onto 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
Shielded interconnect cables and a shielded AC power cable must be employed with this
equipment to ensure compliance with the pertinent RF emission limits governing this
device. Changes or modifications not expressly approved by the system’s manufacturer
could void the user’s authority to operate the equipment.
Preface
ii
Declaration of Conformity
This device complies with part 15 of the FCC rules. Operation is subject to the following
conditions:
•This device may not cause harmful interference, and
•This device must accept any interference received, including interference
that may cause undesired operation
Canadian Department of Communications
This class B digital apparatus meets all requirements of the Canadian Interference-causing
Equipment Regulations.
Cet appareil numérique de la classe B respecte toutes les exigences du Réglement sur le
matériel brouilieur du Canada.
About the Manual
The manual consists of the following:
Chapter 1
Introducing the Motherboard
Describes features of the motherboard.
Go to
H
page 1
Chapter 2
Installing the Motherboard
Chapter 3
Using BIOS
Chapter 4
Using the Motherboard Software
Describes installation of motherboard
components.
Go to
Provides information on using the BIOS
Setup Utility.
Thank you for choosing the 915PL-A2 motherboard. This motherboard is a high performance, enhanced function motherboard that supports LGA775 Socket for latest Intel
Pentium 4/Celeron Processors.
The motherboard incorporates the 915PL Northbridge (NB) and ICH6 Southbridge (SB)
The Northbridge on this motherboard supports a Front Side Bus (FSB) frequency
chipsets.
of 800/533 MHz using a scalable FSB Vcc_CPU.
memory DIMM frequencies of 333MHz and 400 MHz. It supports two DDR Sockets with
up to maximum memory of 2 GB. DDR Maximum memory bandwidth of 3.2 GB/s in singlechannel is supported, or 6.4 GB/s in dual-channel interleaved mode assuming DDR 400MHz.
High resolution graphics via two PCI Express slots, intended for Graphics Interface, are
fully compliant to the PCI Express Base Specification revision 1.0a.
The ICH6 Southbridge supports three PCI slots which are PCI 2.3 compliant. In addition,
one PCI Express x1 slot is supported, fully compliant to the PCI Express Base Specification, Revision 1.0a. It implements an EHCI compliant interface that provides 480Mb/s
bandwidth for eight USB 2.0 ports, integrates Azalia codec supporting Azilia standard that
features an 8-channel High Definition Audio output. One onboard IDE connector supports
2 IDE devices in ATA-100/66 mode. The Southbridge integrates a Serial ATA host controller
that is SATA v1.0 compliant, supporting four SATA ports with maximum transfer rate up to
150 MB/s each and LAN controller supporting 10/100Mbit/s ethernet.
The 915PL-A2 motherboard is equipped with advanced full set of I/O ports in the rear
panel, including PS/2 mouse and keyboard connectors, COM1, LPT1, four USB ports, one
optional LAN port, and audio jacks for microphone, line-in and 8-ch line out.
The momory controller supports DDR
1
Introducing the Motherboard
2
Feature
Processor
The 915PL-A2 uses an LGA775 type of Pentium 4 that carries the following features:
•Accommodates Intel P4/Celeron processors
•Supports a system bus (FSB) of 800/533MHz
•Supports “Hyper-Threading” technology CPU
“Hyper-Threading” technology enables the operating system into thinking it’s hooked
up to two processors, allowing two threads to be run in parallel, both on separate
“logical” processors within the same physical processor.
Chipset
The 915PL Northbridge (NB) and ICH6 Southbridge (SB) chipsets are based on an
innovative and scalable architecture with proven reliability and performance.
915PL (NB)
•Supports 32-bit host bus addressing, allowing the CPU to
access the entire 4 GB of the memory address space.
•Has a 12-deep In-Order Queue to support up to twelve
outstanding piplined address requests on the host bus.
•Supports one PCI Express x16 for Graphics Interface, fully
compliant to the PCI Express base Sepcification revision
1.0a
•Supports 256-Mb, 512-Mb and 1-Gb DDR technologies for
x8 and x16 devices
915PL chipset can only support 256-Mb, 512-Mb and 1-Gb DDR technologies
for x8 and x16 device, NOT support 128-Mb DDR technology. That is, 256 MB
Double Side Memory Module & 128 MB Single Side Memory Module are NOT
support.
ICH6 (SB)•Enhanced DMA Controller , interrupt controller, and timer func-
tions
•Compliant with PCI Express Base Specification, Revision
1.0a
•Compliant with PCI 2.3 specificaiton
•Compliant with Serial ATA 1.0a specification
•Integrated USB 2.0 Host Controller supporting up to eight
USB 2.0 ports
•Integrated LAN controller
•Compliant with Azalia specification supporting 8 channels
of audio outputs
•Integrated IDE controller supports Ultra ATA100/66/33
Memory
•Supports DDR 400/333 MHz DDR SDRAM DIMMs
•Accommodates two unbuffered DIMMs
•Up to 1 GB per DIMM with maximum memory size up to 2 GB
Introducing the Motherboard
Onboard LAN (Optional)
The onboard LAN controller provides the following features:
•Supports 100/10 Mb/s N-Way Auto negotiation operation
•Compliant to PCI Revision 2.2
•Supports Full Duplex Flow Control (IEEE 802.3x)
•2.5/3.3V power supply with 5V tolerant I/Os
Audio
•Compliant with AC’97 2.3 specification
•Meets performance requirements for audio on PC99/2001 systems
•8 Channels DA Converters with 48KHz rate
•Meets Microsoft SHQL/WLP 2.0 audio requirements
Expansion Options
The motherboard comes with the following expansion options:
•Two PCI Express x16 slots for Graphic Interface
•One PCI Express x1 slot
•Three 32-bit PCI v2.3 compliant slots
•One 40-pin IDE low profile connector that support two IDE devices
•One floppy disk drive connector
•Four 7-pin SATA connectors
The 915PL-A2 motherboard supports UltraDMA bus mastering with transfer rates of
100/66 MB/s.
3
Integrated I/O
The motherboard has a full set of I/O ports and connectors:
•Two PS/2 ports for mouse and keyboard
•One serial port
•One parallel port
•Four USB ports
•One LAN port (optional)
•Audio jacks for microphone in, line-in and 8-ch High Definition Audio output
BIOS Firmware
This motherboard uses AMI BIOS that enables users to configure many system
features including the following:
•Power management
•Wake-up alarms
•CPU parameters
•CPU and memroy timing
The firmware can also be used to set parameters for different processor clock speeds.
Some hardware specifications and software items are subject to change
with out prior notice.
Introducing the Motherboard
4
Motherboard Components
Introducing the Motherboard
Table of Motherboard Components
LABEL COMPONENT
1 CPU SocketLGA775 socket for Pentium 4 CPUs
2 CPUFAN1CPU cooling fan connector
3 DIMM1/3184-pin DDR SDRAM slots
4 FDD1Floppy diskette drive connector
5 ATX1Standard 24-pin ATX power connector
6 IDE1Primary IDE channel
7 SATA1~4Serial ATA connectors
8 PANEL1Panel connector for case switches and LEDs
9 SPK1Speaker header
10 CASFAN1 Case cooling fan connector
11 CLR_CMOS1 Clear CMOS jumper
12 USB3-4 Front Panel USB headers
13 ATX4P1 Auxiliary power connector for graphics interface
This concludes Chapter 1. The next chapter explains how to install the motherboard.
Introducing the Motherboard
6
Memo
Introducing the Motherboard
Chapter 2
Installing the Motherboard
Safety Precautions
•Follow these safety precautions when installing the motherboard
•Wear a grounding strap attached to a grounded device to avoid damage from
static electricity
•Discharge static electricity by touching the metal case of a safely grounded
object before working on the motherboard
•Leave components in the static-proof bags they came in
•Hold all circuit boards by the edges. Do not bend circuit boards
Choosing a Computer Case
There are many types of computer cases on the market. The motherboard complies with
the specifications for the ATX system case. First, some features on the motherboard are
implemented by cabling connectors on the motherboard to indicators and switches on the
system case. Make sure that your case supports all the features required. Secondly, 915PLA2 supports one or two floppy diskette drives and two enhanced IDE drives. Make sure that
your case has sufficient power and space for all drives that you intend to install.
Most cases have a choice of I/O templates in the rear panel. Make sure that the I/O
template in the case matches the I/O ports installed on the rear edge of the motherboard.
This motherboard carries an ATX form factor of 305 x 244 mm. Choose a case that
accommodates this form factor.
7
Installing the Motherboard in a Case
Refer to the following illustration and instructions for installing the motherboard in a case.
Most system cases have mounting brackets installed in the case, which correspond the holes
in the motherboard. Place the motherboard over the mounting brackets and secure the
motherboard onto the mounting brackets with screws.
Ensure that your case has an I/O template that supports the I/O ports and expansion slots
on your motherboard.
Installing the Motherboard
8
Do not over-tighten the screws as this can stress the motherboard.
Checking Jumper Settings
This section explains how to set jumpers for correct configuration of the motherboard.
Setting Jumpers
Use the motherboard jumpers to set system configuration options. Jumpers with more than
one pin are numbered. When setting the jumpers, ensure that the jumper caps are placed on
the correct pins.
The illustrations show a 2-pin jumper. When
the jumper cap is placed on both pins, the
jumper is SHORT. If you remove the jumper
cap, or place the jumper cap on just one pin,
the jumper is OPEN.
This illustration shows a 3-pin jumper. Pins
1 and 2 are SHORT
SHORT OPEN
Installing the Motherboard
Checking Jumper Settings
The following illustration shows the location of the motherboard jumpers. Pin 1 is labeled.
9
Jumper Settings
Jumper
CLR_CMOS1
Type
3-pin
Description
CMOS
1-2: NORMAL
2-3: CLEAR CMOS
Before clearing the
CMOS, make sure to
turn off the system.
Installing the Motherboard
Setting
CLR_CMOS1
1
10
Connecting Case Components
After you have installed the motherboard into a case, you can begin connecting the motherboard components. Refer to the following:
1Connect the CPU cooling fan cable to CPUFAN1.
2Connect the case cooling fan connector to CASFAN1.
3Connect the power cooling fan connector PWRFAN1
4Connect the case speaker cable to SPK1.
5Connect the connector for graphics interface to ATX4P1
6Connect the case switches and indicator LEDs to the PANEL1.
7Connect the standard power supply connector to A TX1.
8Connect the auxiliary case power supply connector to PWR1.
Connecting 20/24-pin power cable
Users please note that the 20-pin and 24-pin power cables can both be connected to the ATX1 connector. With the 20-pin power cable, just align the 20pin power cable with the pin 1 of the ATX1 connector. However, using 20-pin
power cable may cause the system to become unbootable or unstable because of
insufficient electricity.
With ATX v1.x power supply, users please
note that when installing 20-pin power cable,
the latche of power cable falls on the left
20-pin power cable
24-pin power cable
side of the ATX1 connector latch, just as the
picture shows.
With ATX v2.x power supply, users please
note that when installing 24-pin power cable,
the latches of power cable and the ATX1
match perfectly.
Installing the Motherboard
CPUFAN1: CPU Cooling F AN Power Connector
PinSignal NameFunction
1GNDSystem Ground
2
+12VPower +12V
3 Sense Sensor
4 PWM CPU FAN control
Users please note that the fan connector supports the CPU cooling
fan of 1.1A~2.2A (26.4W max.) at +12V.
CASFAN1/PWRF AN1: System Cooling F AN Power Connectors
PinSignal NameFunction
1GNDSystem Ground
2+12VPower +12V
3 Sense Sensor
A TX1: A TX 24-pin Power Connector
Pin Signal Name Pin Signal Name
1+3.3V13+3.3V
2+3.3V14-12V
3Ground15COM
4+5V16PS_ON
5Ground17COM
6+5V18COM
7Ground19COM
8PWRGD20-5V
9+5VSB21 +5V
10+12V22+5V
11+12V23+5V
12+3.3V24COM
11
PWR1: ATX 12V Power Connector
Pin Signal Name
1Ground
2Ground
3+12V
4+12V
SPK1: Internal speaker
PinSignal Name
1VCC
2Key
3Ground
4Signal
Installing the Motherboard
12
ATX4P1: Auxliary Power Connector for Graphics Interface
Pin Signal Name
1NC
2GND
3GND
Make sure to connect a 4-pin ATX power cable
to ATX4P1; otherwise, the system will be unstable.
4+12V
Front Panel Header
The front panel header (PANEL1) provides a standard set of switch and LED connectors
commonly found on ATX or Micro ATX cases. Refer to the table below for information:
PinSignalFunctionPinSignalFunction
1 HD_LED_P Hard disk LED+2 FP PWR/SLP *MSG LED+
3 HD_LED_N Hard disk LED-
5 RST_SW_N Reset Switch
7 RST_SW_P Reset Switch
9 RSVDReserved
* MSG LED (dual color or single color)
Hard Drive Activity LED
4 FP PWR/SLP *MSG LED-
6 PWR_SW_P Power Switch
8 PWR_SW_N Power Switch
10 KeyNo pin
Connecting pins 1 and 3 to a front panel mounted LED provides visual indication that data
is being read from or written to the hard drive. For the LED to function properly, an IDE
drive should be connected to the onboard IDE interface. The LED will also show activity
for devices connected to the SCSI (hard drive activity LED) connector.
Power/Sleep/Message waiting LED
Connecting pins 2 and 4 to a single or dual-color, front panel mounted LED provides power
on/off, sleep, and message waiting indication.
Reset Switch
Supporting the reset function requires connecting pin 5 and 7 to a momentary-contact
switch that is normally open. When the switch is closed, the board resets and runs POST.
Power Switch
Supporting the power on/off function requires connecting pins 6 and 8 to a momentarycontact switch that is normally open. The switch should maintain contact for at least 50 ms
to signal the power supply to switch on or off. The time requirement is due to internal debounce circuitry. After receiving a power on/off signal, at least two seconds elapses before
the power supply recognizes another on/off signal.
Installing the Motherboard
Installing Hardware
Installing the Processor
Caution: When installing a CPU heatsink and cooling fan make sure that
you DO NOT scratch the motherboard or any of the surface-mount
resistors with the clip of the cooling fan. If the clip of the cooling fan
scrapes across the motherboard, you may cause serious damage to the
motherboard or its components.
On most motherboards, there are small surface-mount resistors near the
processor socket, which may be damaged if the cooling fan is carelessly
installed.
Avoid using cooling fans with sharp edges on the fan casing and the clips.
Also, install the cooling fan in a well-lit work area so that you can clearly
see the motherboard and processor socket.
Before installing the Processor
This motherboard automatically determines the CPU clock frequency and system bus
frequency for the processor. You may be able to change these settings by making changes
to jumpers on the motherboard, or changing the settings in the system Setup Utility. We
strongly recommend that you do not over-clock processors or other components to run
faster than their rated speed.
Warning: Over-clocking components can adversely affect the reliability
of the system and introduce errors into your system. Over-clocking can
permanently damage the motherboard by generating excess heat in
components that are run beyond the rated limits.
13
This motherboard has a LGA 775 socket. When choosing a processor, consider the performance requirements of the system. Performance is based on the processor design, the clock
speed and system bus frequency of the processor, and the quantity of internal cache memory
and external cache memory.
Installing the Motherboard
14
CPU Installation Procedure
The following illustration shows CPU installation components.
A. Unload the cap
· Use thumb & forefinger to hold the
lifting tab of the cap.
· Lift the cap up and remove the cap
completely from the socket.
B. Open the load plate
· Use thumb & forefinger to hold the
hook of the lever, pushing down and pulling
aside unlock it.
· Lift up the lever.
· Use thumb to open the load plate. Be
careful not to touch the contacts.
C. Install the CPU on the socket
· Orientate CPU package to the socket.
Make sure you match triangle marker
to pin 1 location.
D. Close the load plate
· Slightly push down the load plate onto the
tongue side, and hook the lever.
· CPU is locked completely.
E. Apply thermal grease on top of the CPU.
F. Fasten the cooling fan supporting base onto
the CPU socket on the motherboard.
G. Make sure the CPU fan is plugged to the
CPU fan connector. Please refer to the CPU
cooling fan user’s manual for more detail
installation procedure.
To achieve better airflow rates and heat dissipation, we suggest that you use
a high quality fan with 3800 rpm at least. CPU fan and heatsink installation procedures may vary with the type of CPU fan/heatsink supplied. The
form and size of fan/heatsink may also vary.
Installing the Motherboard
Installing Memory Modules
This motherboard accommodates two memory modules. It can support two 184-pin 2.5V
unbuffered DIMM, DDR400/333/266. The total memory capacity is 2GB.
DDR SDRAM memory module table
Memory moduleMemory Bus
DDR266
DDR333
DDR400
You must install at least one module in any of the three slots. Each module can be installed
with 128 MB to 1 GB of memory; total memory capacity is 2GB.
Do not remove any memory module from its antistatic packaging until you
are ready to install it on the motherboard. Handle the modules only by
their edges. Do not touch the components or metal parts. Always wear a
grounding strap when you handle the modules.
133MHz
166MHz
200MHz
Installation Procedure
Refer to the following to install the memory modules.
1This motherboard supports unbuffered DDR SDRAM .
2Push the latches on each side of the DIMM slot down.
3Align the memory module with the slot. The DIMM slots are keyed with
notches and the DIMMs are keyed with cutouts so that they can only be
installed correctly.
4Check that the cutouts on the DIMM module edge connector match the notches
in the DIMM slot.
5Install the DIMM module into the slot and press it firmly down until it seats
correctly. The slot latches are levered upwards and latch on to the edges of
the DIMM.
6Install any remaining DIMM modules.
15
Installing the Motherboard
16
Table A: DDR (memory module) QVL (Qualified V endor List)
The following DDR400 memory modules have been tested and qualified for use with this
motherboard.
Installing a Hard Dish Drive/CD-ROM/SA T A Hard Drive
This section describes how to install IDE devices such as a hard disk drive and a CD-ROM
drive.
About IDE Devices
Your motherboard has one IDE channel interface. An IDE ribbon cable supporting two IDE
devices is bundled with the motherboard.
You must orient the cable connector so that the pin1 (color) edge of the
cable correspoinds to the pin 1 of the I/O port connector.
IDE1: IDE Connector
This motherboard supports four high data transfer SATA ports with each runs up to 150
MB/s. To get better system performance, we recommend users connect the CD-ROM to
the IDE channel, and set up the hard dives on the SATA ports.
IDE devices enclose jumpers or switches used to set the IDE device as MASTER or SLAVE.
Refer to the IDE device user’s manual. Installing two IDE devices on one cable, ensure that
one device is set to MASTER and the other device is set to SLAVE. The documentation of
your IDE device explains how to do this.
17
About SA TA Connectors
Your motherboard features four SATA connectors supporting a total of four drives. SATA ,
or Serial ATA (Advanced Technology Attachment) is the standard interface for the IDE
hard drives which are currently used in most PCs. These connectors are well designed and
will only fit in one orientation. Locate the SATA connectors on the motherboard and follow
the illustration below to install the SATA hard drives.
Installing Serial A TA Hard Drives
To install the Serial ATA (SATA) hard drives, use the SATA cable that supports the Serial
ATA protocol. This SATA cable comes with an SATA power cable. You can connect either
end of the SATA cable to the SATA hard drive or the connector on the motherboard.
SATA cable (optional)
SATA power cable (optional)
Installing the Motherboard
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