Shuttle MN31L User manual

MN31L
AMD Athlon XP/Athlon/Duron
462-pinProcessor
with 200/266/333/400 MHz FSB
Based DDR MAINBOARD
User's Manual

M896
Shuttle®MN31L
AMDAthlon XP/Athlon/Duron
462-pin Processor
with 200/266/333/400 MHz FSB
Based DDR Mainboard
Manual Version 1.0
Copyright
Copyright©2004 by Shuttle®Inc. All Rights Reserved.
This publication, including all photos, illustrations, and software, is protected under interna-
tional copyright laws, with all rights reserved. Reproducing any of the material contained
herein is prohibited without the consent of the publisher.
Disclaimer
Shuttle®Inc. shall not be liable for any incidental or consequential damages resulting from the
performance or use of this product.
This company makes no representations or warranties regarding the contents of this manual.
Information in this manual has been carefully checked for reliability; however, no guarantee is
given as to the correctness of the contents. In the interest of continued product improvement,
this company reserves the right to revise the manual or include changes in the specifications
of the product described within it at any time without notice and without obligation to notify any
person of such revision or changes. The information contained in this manual is provided for
general use by the customers.
Trademarks
Shuttle is a registered trademark of Shuttle Inc.
nVIDIAisaregisteredtrademark of nVIDIACorporation.
AMD,Athlon, andDuron areregistered trademarksofAMD Corporation.
PS/2 is a registered trademark of IBM Corporation.
AWARD is a registered trademark of Award Software Inc.
Microsoft and Windows are registered trademarks of Microsoft Corporation.
General Notice: Other product names used in this manual are ascribed to their respective
owners and acknowledged.

Thermalissue is highlyessential for processorswith a speedof 600MHz andabove.
Hence,we recommend you touse the CPU fanqualified byAMD or motherboard
manufacturer.Meanwhile,pleasemakesureCPUandfanaresecurelyfastenedwell.
Otherwise,improperfaninstallationnotonlygetssystemunstablebutalsocould
damagebothCPU and motherboard becauseinsufficient thermal dissipation.
Ifyouwould like toknowmore about thermal topicplease see AMD website for
detailedthermalrequirementthroughtheaddress:
http://www.amd.com
WARNING

Ifyou’ve changed your CPUor overclocked yoursystem, the system mayfail to bootup,
even with a Clear CMOS jumper physically resetted. The reason is that nVIDIA’s new
nForce2 chipset introduces a way to reset a Clear CMOS jumper without removing a
chassis.Pleasefollow the steps listedbelow:
1. Turnoffyourcomputerandunplugthepowercable.Reconnectitafter30seconds;
2. Press<Insert>andthenpress yourcomputer’sstartbutton. Continueholding<Insert>
untilthesystembeginsthePOST(Power-OnSelfTest);
3. Immediatelypress<Del>toentertheBIOS;
4. Select‘LoadOptimizedDefaults’ to return your systemtoabootable condition; then
select ‘SAVE to CMOS and EXIT’;
5. Rebootyoursystem.
Yoursystem,however,mayalsonotbootupafteryou’veresettedtheCPUFSB.Theremedy
is to highlight “SAVE to CMOS and EXIT” in the BIOS and then restart your computer.
There will be on screen a message warning you not to reset or turn off your computer, a
message described as:
Warning! New setting is updating now
Do not Reset or Shutdown the system
ThesystemworksafterupdatingtheBIOS.
NOTICE

Statement of Shuttle Mainboard via the EMI Test
Shuttle mainboards have been via the EMI test in terms of series of regulations: EN55022/
CISPR22/AS/NZS3548Class B, EN55024 (1998/AS/NZS), EN4252.1(1994), EN61000,ANSI
C63.4 (1992), CFR47 Part 15 Subpart B, and CNS13438 (1997). The items tested are illus-
trated as follows:
(A)Voltage:AC110V/60HZ &AC230V/50HZ
(B) Tested Product Information:
Product Name: PC Mainboard
Status: Sample
ModelName:MN31L
S/N:N/A
CPU:
External Frequency: 200 MHz
AMDAthlon XP: 3200+
External Frequency: 166 MHz
AMDAthlon XP:2700+,2800+
External Frequency: 133 MHz
AMDAthlonXP: 1500+,1600+,1700+,1800+,1900+,2000+,2100+,2400+, 2600+
Mouse Port: one port with 6 pins
Keyboard Port: one port with 6 pins
Parallel Port: one port with 25 pins
VGA Port: two ports with 15 pins respectively
MIDI/Game Port: one port with 15 pins
Line-Out & Line-In & Mic-In Ports: one port for each
LAN Port: one port with 8 pins (10Mbps/100Mbps)
USB 2.0 Port: two ports with 4 pins respectively
DDR Memory: 256 MB *3
All CPUs have completely been tested, and values offered by the worst EMI combination of
CPU external frequency are listed as follows:
(C) Remedy for the Tested Product & Its EMI Interference:
Remedy:N/A
EMIInterference:
Crystal: 14.3 MHz(Y1)/ 32.768 KHz(Y2)/ 12 MHz(Y3)/ 24.576 MHz(Y4)/
25MHz(Y5)/ 24.50 MHz(Y6)
Test Mode External Frequency CPU Case Open/Close
1200 MHz Athlon XP 3200+ Close
2200 MHz Athlon XP 3200+ Open
3166 MHz Athlon XP 2800+ Close
4166 MHz Athlon XP 2800+ Open
5133 MHz Athlon XP 2600+ Close
6133 MHz Athlon XP 2600+ Open

(D) Supported Host Peripherals:
Host Peripheral Product Name Model Name S/N FCC ID
#1 Case KF45A N/A
#2 Power Supply (300W) ENP-0730 (ATX12V) 1000002885
#3 IBM HDD (30.7GB) 91024UB YKFY7981 3892I168
#4 MITSUMI FDD D353M
#5 SONY VCD Player CDU4811 3892A291
#6 AGP Card Winfast Geforce 2 MX 3892C520
#7 Power Cable Detachable and Shielded

- 1 -
TABLE OF CONTENTS
WHAT'S IN THE MANUAL.................................................................... 4
Quick Reference............................................................................................... 4
About This Manual ........................................................................................... 4
1 INTRODUCTION................................................................................ 5
1.1 TO DIFFERENT USERS ............................................................................. 5
FIRST-TIMEDIYSYSTEMBUILDER............................................................ 5
EXPERIENCEDDIYUSER ......................................................................... 5
SYSTEMINTEGRATOR............................................................................... 5
1.2 ITEM CHECKLIST: ...................................................................................... 6
2 FEATURES ........................................................................................ 7
2.1 SPECIFICATIONS ....................................................................................... 7
3 HARDWARE INSTALLATION..........................................................10
3.1 STEP-BY-STEP INSTALLATION............................................................... 10
STEP1 Install theCPU ...............................................................................11
STEP 2 Set Jumpers ................................................................................. 12
STEP3 Install DDR SDRAMSystem Memory............................................ 12
STEP4InstallInternalPeripheralsinSystemCase .................................... 13
STEP5 Mount theMainboard on theComputer Chassis ............................ 14
STEP6 Connect Front-Panel LEDs/Switches/Speaker/USBs.................... 15
STEP 7 Connect IDE and Floppy Disk Drives ............................................ 16
STEP8ConnectOtherInternalPeripherals................................................ 17
STEP9 Connect thePower Supplies......................................................... 18
STEP10InstallAdd-onCards in Expansion Slots ...................................... 18
STEP11 ConnectExternal Peripherals toBack-Panel ............................... 19
STEP12 System BootUp For the First-Time ............................................. 20
STEP13Install Drivers & SoftwareComponents ....................................... 21
3.2 JUMPER SETTINGS ................................................................................. 22
JUMPERS&CONNECTORSGUIDE........................................................ 23
Jumpers
Clear CMOS Setting (JP1)........................................................................ 26

- 2 -
Back-Panel Connectors
PS/2Keyboard & PS/2 Mouse Connectors................................................ 27
VGAPortConnectors ................................................................................ 27
ParallelPortConnector.............................................................................. 27
Line-OutPortConnector ............................................................................ 27
Line-In(SharedwithRear-Out)PortConnector........................................... 27
Mic-In(SharedwithCenter/Bass-Out)PortConnector ................................ 28
MIDI/GamePortConnector ........................................................................ 28
USB1/USB2Port Connectors .................................................................... 28
LANPortConnector................................................................................... 28
Front-Panel Connectors
HDD LED Connector (HLED) .................................................................... 29
GreenLED Connector (GLED) .................................................................. 29
HardwareResetConnector(Reset) ........................................................... 30
ATXPowerOn/OffSwitchConnector(PWON) ........................................... 30
EPMIConnector(EPMI)............................................................................. 31
Power LED Connector (PLED) .................................................................. 31
SpeakerConnector(Speaker) ................................................................... 31
Front-PanelAudioHeader (JP9) ................................................................ 32
ExtendedUSB Headers (JP2/JP3) ............................................................ 32
Internal Peripheral Connectors
EnhancedIDEand Floppy Connectors (IDE1/IDE2&FLP1) ...................... 33
Other Connectors
ATXPower Supply Connectors(CN2/CN3)................................................ 34
CPUandSystem Fan Connectors (FAN1/2/3)............................................ 35
AudioCenter/Bass Header (JP5)............................................................... 35
SPDIFExt. Header (JP7)........................................................................... 36
Audio CD_INConnectors (JP6/JP8) .......................................................... 36
AudioAUX_IN Connector (JP10)(White) .................................................... 37
SerialPortConnectors (COM1/COM2) ...................................................... 37
IRHeader(JP4)......................................................................................... 38
AGP Protection LED (D1).......................................................................... 38
CPUOvertemperature LED (D30) ............................................................. 38

- 3 -
3.3 SYSTEM MEMORY CONFIGURATION ..................................................... 39
INSTALLMEMORY .................................................................................... 39
UPGRADEMEMORY................................................................................ 39
4 SOFTWARE UTILITY ......................................................................40
4.1 Mainboard CD Overview .......................................................................... 40
4.2 Install Mainboard Software ...................................................................... 41
4.2.A Install NVDIA Chipset driver ................................................................. 42
4.2.B Install VGA Device Driver...................................................................... 42
4.3 View the User's Manual............................................................................ 43
5 BIOS SETUP ................................................................................... 44
5.1 ENTER BIOS ............................................................................................. 44
5.2 THE MAIN MENU ...................................................................................... 45
STANDARD CMOS FEATURES ............................................................... 47
ADVANCED BIOS FEATURES................................................................. 49
ADVANCED CHIPSET FEATURES .......................................................... 52
INTEGRATEDPERIPHERALS .................................................................. 55
POWERMANAGEMENTSETUP.............................................................. 58
PNP/PCICONFIGURATIONS .................................................................... 61
PCHEALTHSTATUS................................................................................ 62
LOAD FAIL-SAFE DEFAULTS .................................................................. 63
LOADOPTIMIZEDDEFAULTS ................................................................. 63
SETSUPERVISOR/USER PASSWORD................................................... 64
Save & Exit Setup...................................................................................... 65
ExitWithoutSaving.................................................................................... 65

- 4 -
Quick Reference
Hardware Installation >> Step-by-Step ................................................Page 10
Jumper Settings >> A Closer Look.......................................................Page 22
Software Utility >> How to Install..........................................................Page 40
BIOS Setup >> How to Configure.........................................................Page 44
About This Manual
For First-Time DIY System Builder .........................................................Page 5
For Experienced DIY User ......................................................................Page 5
For System Integrator .............................................................................Page 5
WHAT'S IN THE MANUAL

- 5 -
1.1 To Different Users
First-Time DIY System Builder
Welcome to the DIY world! Building your own computer system is not as diffi-
cult as you may think. To make your first computer DIY experience successful,
right from the start, we have designed Chapter 3 Hardware Installation in a
step-by-step fashion for all the first-time DIY system builders. Prior to installa-
tion, we suggest you read the whole manual to gain a complete understanding
of your new MN31L mainboard.
Experienced DIY User
Congratulate on your purchase of the MN31L mainboard. You will find install-
ing your new MN31L mainboard is quite easy. Bundled with an array of onboard
functions, the highly-integrated MN31L mainboard provides you with a total
solution to build the stablest and most reliable system. Referring to section 3.2
Jumper Settings and Chapter 4 Software Utility, you will find how to work
out your new mainboard. Chapter 5 BIOS Setup also contains the relevant
information on how to tune up your system to achieve higher performance.
System Integrator
You have wisely chosen MN31L to construct your system. MN31L incorpo-
rates all the state-of-the-art technology of the nForce2 IGP chipset from nVIDIA.
Each integrates the most advanced functions you've ever found in a compact
Micro ATX board.
1INTRODUCTION

- 6 -
1.2 Item Checklist:
Check all items with your MN31L mainboard to make sure nothing is miss-
ing. A complete package should include:
-One Shuttle MN31L Mainboard
-One ATA 133/100/66/33 Ribbon Cable
-One Floppy Ribbon Cable
-One Twin-Port USB Cable
-MN31L User's Manual
-I/O Shielding
-One Bundled CD-ROM, including:
ØMN31L user's manual in PDF format
ØNVDIA Chipset driver
ØVGA Device Driver
ØAward Flashing Utility
W49V002AP
2204484Y2
216WFSA
Winbond
C
+
+
+
-
-
-
Reset
HLED
GLED
Speaker
EPMI
PWON PLED
IR JP4
1
CN1
VGA2
VGA1
PRN1
AUDIO1
USB1 LAN1
1
1
COM2
COM1
FAN1
1
DIMM1
DIMM2
DIMM3
FLP1
1
ATXPWR
1
CN3
FAN2
1
IDE1
IDE2
1 1
1
JP13
1
JP1
CMOS
1
JP2
USB 3&4
JP3
USB 5&6
T
A
I
W
A
N
n
V
I
D
I
A
n
F
O
R
C
E
2
M
C
P
JP10
JP8
11
AUX_IN
CD_IN
CD_IN
JP6 1
SPDIF Ext.
JP7 1
JP5
1
ALC650
28200Q1240E
Front Audio
JP9
1
REALTEK
RTL8201BL
TAIWAN
PCI2
PCI3
PCI1
AGP1
FAN3
1
1
CN2
ATX12V
JP3
1
D30
CPU Overtemperature LED
AGP Protection LED
D1

- 7 -
MN31L mainboard is dedicatedly designed for demanding PC users who desire high
performance and maximum intelligent features in a compact package.
2.1 Specifications
-CPU Support
AMD Athlon XP/Athlon/Duron, 462-pin processors with 200/266/333/400
MHz FSB.
-Chipset
Features nVIDIA nForce2 IGP N.B. and nVIDIA MCP S.B..
-Onboard 10/100Mb/s LAN
The Realtek RTL8201BL incorporated in the chipset provides the mainboard
with integrated Fast Ethernet capabilities.
-AC'97 Audio
Realtek ALC650 Supports 18-bit ADC and DAC resolutions, and four analog
line-level stereo inputs. Compliant with AC'97 2.3 specifications.
-On Board Graphical Controller
The nForce2 IGP Host Controller integrates a high performance and high
quality 3D/2D Graphical Accelerator.
ØIntegrated Geforce4 MX GPU
ØBuilt-in a high performance and high quality 256-bit 3D/2D graphic accel-
erator.
ØnView dual-display architecture supporting desktop VGA monitor andDVI
display.
ØDual CRTC/simultaneous Dual Display.
ØIntegrated dual 300 MHz palette-DACs for analog VGA monitors up to
1920x1400.
-Versatile Memory Support
Features the dual-channel mode of 128-bit data transfer rate.
Three 184-pin DDR SDRAM DIMM slots maximumly accommodate 3GB
of PC1600/2100/2700/3200.
-PCI Expansion Slots
Provides three 32-bit PCI slots.
2 FEATURES

- 8 -
-AGP Expansion Slot
Provides one AGP 1.5V slot that supports 8X/4X/2X AGP device.
-USB 2.0 Interface Onboard
Ø2 x USB ports on back-panel and two extended USB headers (4 ports) on
front-panel.
-I/O Interface
Provides a variety of I/O interfaces:
Ø2 x PS/2 ports for Mouse and Keyboard
Ø1 x Parallel port
Ø2 x VGA ports
Ø1 x MIDI/Game port
Ø1 x Line-Out port
Ø1 x Line-In (shared with Rear-Out) port
Ø1 x Mic-In (shared with Center/Bass-Out) port
Ø1 x LAN port
Ø2 x USB ports
-PCI Bus Master IDE Controller Onboard
Two ultra DMA 100 bus master dual-channel IDE ports support up to four IDE
devices (one Master and one Slave per channel).
The IDE bus implements data transfer speeds to 133/100/66/33MB/sec and sup-
ports enhanced PIO modes.
80-pin cable backward compatible legacy ATAPI devices, ATAPI IDE CD-ROM,
CD-R, CD-RW, and LS-120 supports.
-ATX Power Supply Connector
ATX power supply unit can be connected to the onboard 20-pin ATX power
connector, and 4-pin ATX power connector. The unit supports Suspend and
Soft-On/Off modes by the dual-function power button.
-Advanced Configuration and Power Interface
Features four power-saving modes: S1 (Snoop), S3 (Suspend to RAM), S4
(Suspend to DISK), and S5 (Soft-Off). ACPI provides more efficient energy-
saving features controlled by your operating system that supports OS Direct
Power Management (OSPM) functionality.

- 9 -
-System BIOS
Provides licensed Award BIOS V6.0 PG on the 2Mb Flash EEPROM, and
supports Green PC, Desktop Management Interface (DMI).
-Form Factor
System board conforms to the Micro ATX specification.
Board dimension: 244mm x 244mm.
-Advanced Features
ØLow EMI - Built in spread spectrum. Unused PCI/SDRAM slots are shut off
by the automatic clock for reducing EMI.
ØDual Function Power Button - The system can be in any of the two
states: one is Suspend mode and the other is Soft-Off mode. Pushing the
power button for less than 4 seconds places the system into Suspend
mode. When the power button is pressed for longer than 4 seconds, the
system will enter Soft-Off mode.
ØModem Ring Power-On - The system can be powered on automatically
by the activation of modem ringing.
ØCPU Host/SDRAM - This item allows users to adjust CPU Host Clock,
and SDRAM in BIOS.
-Intelligent Features
ØVoltage Monitoring - Monitors various voltages of key elements, such as
the CPU, and other critical system voltage levels to ensure a stable current
passing through mainboard components.
ØFan Status Monitoring -To prevent the CPU from overheating, the CPU
fan is monitored by RPM, with which the cooling fan is required.
ØTemperature Monitoring -This item allows users to make sure whether
the CPU or system runs under a suitable temperature.

- 10 -
Before removing/installing any of these devices: CPU, DIMMs, Add-On
Cards, and Cables, please unplug the onboard power connector.
This section outlines how to install and configure your mainboard. Referring to the follow-
ing mainboard layout helps you identify various jumpers, connectors, slots, and ports. Steps
described herein will lead you to a quick and correct installation of your system.
3.1 Step-by-Step Installation
3HARDWAREINSTALLATION
Accessories Of MN31L
W49V002AP
2204484Y2
216WFSA
Winbond
C
+
+
+
-
-
-
Reset
HLED
GLED
Speaker
EPMI
PWON
PLED
IR JP4
1
CN1
VGA2
VGA1
PRN1
AUDIO1
USB1 LAN1
1
1
COM2
COM1
FAN1
1
DIMM1
DIMM2
DIMM3
FLP1
1
ATXPWR
1
CN3
FAN2
1
IDE1
IDE2
1 1
1
JP13
1
JP1
CMOS
1
JP2
USB 3&4
JP3
USB 5&6
T
A
I
W
A
N
n
V
I
D
I
A
n
F
O
R
C
E
2
M
C
P
JP10
JP8
11
AUX_IN
CD_IN
CD_IN
JP6 1
SPDIF Ext.
JP7 1
JP5
1
ALC650
28200Q1240E
Front Audio
JP9
1
REALTEK
RTL8201BL
TAIWAN
PCI2
PCI3
PCI1
AGP1
FAN3
1
1
CN2
ATX12V
JP3
1
D30
CPU Overtemperature LED
AGP Protection LED
D1
PS/2 Keyboard &
Mouse Connectors
CD_IN Connector - JP6/JP8
FAN1
VGA Port 2
Connector
Parallel Port
Connector
VGA Port 1
Connector
MIDI/Game Port
Connectors
USB Port & LAN
Port Connectors
ATX12V
Connector - CN2
One AGP Slot
FAN3
Realtek 8201BL
Three PCI Slots
Front Panel Audio
Header - JP9
Center/Bass
Header - JP5
SPDIF Ext.
Header - JP7
AUX_IN Connector - JP10
Extended USB Headers - JP2/JP3
Front Panel
Header - JP13
nVIDIA
MCP
Clear CMOS
Jumper - JP1
Two IDE
Connectors
nVIDIA
nForce2 IGP
FAN2
Three DIMM
Slots
ATXPWR
Connector
- CN3
Floppy
Connector
SOCKET462
IR Header - JP4
COM1/COM2
Realtek ALC650
Line-In (Rear-Out)/
Mic-In (Center/
Bass-Out) &
Line-Out/
AGP Protection
LED - D1
CPU Over-
temperature
LED - D30

- 11 -
Step 1
Install the CPU:
1. Locate the CPU ZIF (Zero Insertion Force) socket on the upper-right
sector of your mainboard (between the back-panel connectors and the
DIMM memory slots).
2. Pull the CPU ZIF socket lever slightly sideways away from the socket to
unlock the lever, and then bring it to an upwardly vertical position.
3. Place your AMD AthlonXP/Athlon/Duron processor in the socket A. Note
that the CPU's edges have been purposely designed non-symmetrically
to prevent from inserting the processor in the wrong direction. The follow-
ing diagram demonstrates the correct placement of the CPU in the ZIF socket.
You can see that the two blunt-edged corners should face towards the socket-
lever.
4. Slightly push the AMD AthlonXP/Athlon/Duron processor into the socket
without applying excessive force while making sure there is no gap between
CPU and socket. Then lower the socket-lever all the way down to its hori-
zontal position and lock it to secure the CPU in place.
5. The AMD AthlonXP/Athlon/Duron processor requires a set of heatsink/
fan to ensure proper cooling of the processor. If heatsink/fan have not been
already mounted on your CPU, you must purchase the heatsink/fan sepa-
rately and have it installed. Plug the cable throught the heatsink/fan in the
CPU fan power connector located nearby. Note that there are several types
of CPU fan connectors. Normally, if your mainboard supports the hard-
ware monitoring function, a 3-pin fan power connector should allow your
system to detect the CPU fan's speed. The CPU fan can also run with a 2-
pin fan power connector, however, detection of CPU fan's speed is not sup-
ported. Another type of CPU fan may feature a large 4-pin fan power con-
nector, which does not support CPU fan's speed detection and must be di-
rectly connected to the system's power supply unit. Please refer to the fol-
lowing diagram.
Notch
AMD CPU
S
O
C
K
E
T
4
6
2
A
S
S
E
M
B
L
E
D
I
N
M
A
L
A
Y
S
I
A
Lever
Blank
Blank
S
O
C
K
E
T
4
6
2

- 12 -
Step 2.
Set Jumpers
The default jumper settings have been set for the common usage standard of
this mainboard. Therefore, you need not to reset the jumpers unless you re-
quire special adjustments as the following case:
Clear CMOS Setting
For first-time DIY system builders, we recommend that you not change the
default jumper settings if you are not quite familiar with the mainboard con-
figuration procedures. The factory-set default settings are tuned for optimum
system performance. For advanced users who prefer to customize their
system, section 3.2 Jumper Settings provides the detailed information on
how to configure your mainboard manually.
Step 3
Install DDR SDRAM System Memory
To install memory, insert DDR SDRAM memory module(s) in the DIMM
banks. Note that DDR SDRAM modules are directional and will not go in the
DIMM banks if they are not properly oriented. After the module is fully in-
serted into the DIMM bank, lift the clips of both sides of the DIMM bank to
lock the module in place.
DDR SDRAM

- 13 -
Step 4
Install Internal Peripherals in System Case
Before you place the mainboard into your system case, we recommend that
you first assemble all the internal peripheral devices into the computer hous-
ing, including, but not limited to, the hard disk drive (IDE/HDD), floppy disk
drive (FDD), CD-ROM drive, and ATX power supply unit.
To install IDE & FDD drives, follow these procedures:
1. Set the required jumpers on each device according to the instructions pro-
vided by the manufacturer. (IDE, HDD, and CD-ROM have to set jumpers
to Master or Slave mode depending on whether you install more than one
device of each kind.)
2. Connect the IDE cable and FDD cable on the back-panel of the internal
peripheral devices to the corresponding headers on board. Note that the
cable should be oriented with its colored stripe (usually red or magenta)
connected to pin#1 of the IDE or FDD connector on the mainboard and
on the device as well.
3. Connect an available power cable from your system power supply unit to
the back-panel of each peripheral device. Note that the power cable is di-
rectional and cannot fit in if not properly positioned.

- 14 -
Step 5
Mount the Mainboard on the Computer Chassis
1. You may find there are a lot of mounting holes on your computer chassis
and mainboard. To match the holes on both properly, the key point is to
make the back-panel of the mainboard in a close fit with your system case,
as shown below.
2. Position the studs between the chassis and the mainboard. The studs are
used to fix the mainboard and to keep a certain distance between the
them, for avoiding any electrical shorts in-between.
(If your computer case is already equipped with mounting studs, you need
to tighten the screws to attach the mainboard.)
Note: In most computer housings, you can find 4 or more holes to place
studs for fixing the mainboard. If there aren't enough matching holes,
screw at least 4 studs to ensure the proper attachment of the main-
board.