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 1.0
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 RS400-A motherboard. This motherboard is a high performance, enhanced function motherboard that supports LGA775 Pentium 4/Celeron processors for high-end business or personal desktop markets.
The motherboard incorporates the RS400 Northbridge (NB) and SB400 Southbridge (SB)
chipsets. The Northbridge supports a Front Side Bus (FSB) frequency of 800/533 MHz using
a scalable FSB Vcc_CPU. The memory controller supports DDR/DDR2 SDRAM interface
of DDR400/333/266 MHz or DDR2-667/533/400 MHz. It supports four DDR Sockets with
up to maximum memory size of 2GB. Aside from the onboard AGP Express slot, one PCI
Express x16 slot, intended for Graphics Interface, is fully compliant to the PCI Express
Base Specification revision 1.0a.
The SB400 Southbridge supports two PCI slots which are PCI 2.3 compliant. In addition,
two PCI Express x1 slots are 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. Two onboard IDE connectors supports 4 IDE devices in
UDMA 133/100/66/33 modes. 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.
The RS400-A motherboard is equipped with advanced full set of I/O ports in the rear panel,
including PS/2 mouse and keyboard connectors, COM1, LPT1, VGA, four USB ports, one
optional LAN port, and audio jacks for microphone, line-in and line-out.
1
Introducing the Motherboard
2
Feature
Processor
The RS400-A uses an LGA775 type of Pentium 4 that carries the following features:
•Accommodates the latest 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 RS400 Northbridge (NB) and SB400 Southbridge (SB) chipsets are based on an
innovative and scalable architecture with proven reliability and performance.
“*” stands for optional components and may not exist onboard.
Users please note that DDR & DDR2 can’t both be applied at the same time on
this motherboard. Users can use either DDR or DDR2 memory modules only!
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, RS400A supports one or two floppy diskette drives and four 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 a 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_CMOS
BIOS_WP 3-pin
Type
3-pin
Description
CLEAR CMOS
BIOS PROTECT
Setting (default)
1-2: NORMAL
2-3: CMOS CLEAR
Before clearing the
CMOS, make sure to
turn off the system.
1-2: DISABLE
2-3: ENABLE
Installing the Motherboard
CLR_CMOS
1
BIOS_WP
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 CPU_FAN.
2Connect the system cooling fan connector to SYS_FAN.
3Connect the power fan connector to PWR_FAN.
4Connect the case speaker cable to SPK1.
5Connect the case switches and indicator LEDs to the PANEL1.
6Connect the standard power supply connector to ATX_POWER.
7Connect the auxiliary case power supply connector to ATX12V.
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.
Users please note that when installing 20pin power cable, the latche of power cable
clings to the left side of the ATX_POWER
20-pin power cable
24-pin power cable
connector latch, just as the picture shows.
Users please note that when installing 24pin power cable, the latches of power cable
clings to the right side of the ATX_POWER
connector latch.
Installing the Motherboard
CPU_FAN: F AN Power Connectors
PinSignal NameFunction
1GNDSystem Ground
+12VPower +12V
2
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.
SYS_FAN/PWR_F AN: F AN Power Connectors
PinSignal NameFunction
1GNDSystem Ground
+12VPower +12V
2
3 Sense Sensor
SPK1: Internal speaker
PinSignal Name
1VCC
2NC
3NC
4Signal
11
A TX12V: A TX 12V Power Connector
PinSignal Name
1Ground
2Ground
3+12V
4+12V
A TX_PWR: A TX 24-pin Power Connector
Pin Signal Name Pin Signal Name
1+3.3V13+3.3V
2+3.3V14-12V
3Ground15GND
4+5V16PS_ON
5Ground17GND
6+5V18GND
7Ground19GND
8PWRGD20-5V
9+5VSB21 +5V
10+12V22+5V
11+12V23+5V
12+3.3V24GND
Installing the Motherboard
12
Front Panel Connector
The front panel connector (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
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.
4 FP PWR/SLP *MSG LED(-)
6 PWR_SW_P Power Switch(+)
8 PWR_SW_N Power Switch(-)
10 KeyNo pin
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 accomodates four memory modules. It can support two 184-pin 2.5V
unbuffered DIMM, DDR 400/333/266 or two 240-pin 1.8V DDR2 667/533/400. The
maximum memory capacity is 2GB.
Users please note that DDR & DDR2 can’t both be applied at the same time on
this motherboard. Users can use either DDR or DDR2 memory modules only!
DDR SDRAM memory module table
Memory moduleMemory Bus
DDR 266 133MHz
DDR 333 166MHz
DDR 400 200MHz
DDR2 SDRAM memory module table
Memory moduleMemory Bus
DDR2 400 200MHz
DDR2 533 266MHz
DDR2 667 333MHz
You must install at least one module in any of the four slots. Each module can be installed
with 256MB to 1GB of memory.
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.
15
Installation Procedure
Refer to the following to install the memory modules.
1This motherboard supports unbuffered DDR and DDR2 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.
Installing the Motherboard
16
Table A: DDR QVL (Qualified Vender List)
The following DDR400 memory modules have been tested and qualified
for use with this motherboard.
The following DDR2 memory modules have been tested and qualified
for use with this motherboard.
Type Size Vendor Model N ame
DDR2 400 512MB NANYA NT5TU64M8AF-5A
DDR2 533
512MB
DDR2 667 512MB E LPIDA E2508AA-DF-E
elixir N2TU51216AF-37B 256MB
Kingston HYB18T512160AC-3.7
elixir N2TU51280AF-37B
Kingston E5108AB-5C-E ES
NANYA NT5TU64M8AF-37B
SAMSUNG K4T51083QB-GCD5
Installing the 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 two IDE channel interfaces (IDE1 & IDE2). Two IDE ribbon cables
supporting four 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: Primary IDE Connector
The first hard drive should always be connected to IDE1.
IDE2: Secondary IDE Connector
The second drive on this controller must be set to slave mode. The cinfiguration is the same
as IDE1.
17
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.
Installing the Motherboard
18
About SAT A Connectors
This 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 T A 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
Refer to the illustration below for proper installation:
1Attach either cable end to the connector on the motherboard.
2Attach the other cable end to the SATA hard drive.
3Attach the SATA power cable to the SATA hard drive and connect the other
end to the power supply.
This motherboard does not support the “Hot-Plug” function.
(optional)
SATA power cable (optional)
Installing the Motherboard
Installing a Floppy Diskette Drive
The motherboard has a floppy diskette drive (FDD) interface and ships with a diskette drive
ribbon cable that supports one or two floppy diskette drives. You can install a 5.25-inch
drive and a 3.5-inch drive with various capacities. The floppy diskette drive cable has one
type of connector for a 5.25-inch drive and another type of connector for a 3.5-inch drive.
You must orient the cable connector so that the pin 1 (color) edge of the
cable corresponds to the pin 1 of the I/O port connector.
FDD: Floppy Disk Connector
This connector supports the provided floppy drive ribbon cable. After connecting the single
end to the onboard floppy connector, connect the remaining plugs on the other end to the
floppy drives correspondingly.
19
Installing the Motherboard
20
Installing Add-on Cards
The slots on this motherboard are designed to hold expansion cards and connect them to the
system bus. Expansion slots are a means of adding or enhancing the motherboard’s features
and capabilities. With these efficient facilities, you can increase the motherboard’s capabilities by adding hardware that performs tasks that are not part of the basic system.
PCIEX16
Slot
PCIE1~2
Slots
AGP
Express
Slot
PCI 1/2
Slots
The PCI Express x16 slot is used to install an external PCI Express graphics
card that is fully compliant to the PCI Express Base Specification revision
1.0a.
These two PCI Express x1 slots are fully compliant to the PCI Express Base
Specification revision 1.0a as well.
The AGP Express slot is used to install an AGP graphics card that emulates
the AGP function. To get better performance and compatibility on our
special designed AGP Express slot, we recommend users use one of the AGP
graphics cards that have been tested by out company. See the “Supported
AGP 8X/4X VGA Cards List” or visit our website at “
for the updated supported list.
This motherboard is equipped with two standard PCI slots. PCI stands for
Peripheral Component Interconnect and is a bus standard for expansion
cards, which for the most part, is a supplement of the older ISA bus standard.
The PCI slots on this board are PCI v2.3 compliant.
1.Before installing an add-on card, check the documentation for the card carefully.
If the card is not Plug and Play, you may have to manually configure the card
before installation.
2.Some PCI-E x16 graphics cards may be so bulky that it could block one PCI-E
x1 slot.
3.Please pull out the PCI-Ex16 graphics card straightway to remove it when you
want to uninstall it.