Shuttle MK35V User manual

MK35V&MK35VN
AMD AthlonXP/Athlon/Duron
462-pinProcessor
with 200/266 MHz FSB
Based DDR MAINBOARD
User's Manual

Thermalissueishighlyessentialforprocessorswithaspeedof600MHzandabove.
Hence,werecommendyoutousetheCPUfanqualifiedbyAMDor motherboard
manufacturer.Meanwhile,pleasemakesure CPUandfan aresecurelyfastened well.
Otherwise,improper faninstallationnot onlygetssystem unstablebutalso could
damageboth CPU and motherboard because insufficient thermaldissipation.
Ifyou would like to know more about thermaltopicpleaseseeAMD website for
detailedthermal requirementthroughthe address:
http://www.amd.com
WARNING

M808
Shuttle®MK35V & MK35VN
AMDAthlonXP/Athlon/Duron
462-pin Processor
with 200/266 MHz FSB
Based DDR Mainboard
Manual Version 1.1
Copyright
Copyright©2003 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.
AMD,Athlon,andDuronare registered trademarks ofAMD Corporation.
PS/2 is a registered trademark of IBM Corporation.
AWARD is a registered trademark ofAward 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.

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:MK35VN/MK35V
S/N:N/A
CPU:
External Frequency: 133 MHz
AMDAthlonXP1500+/1600+/1700+/1800+/1900+/2000+/2100+/2400+/2600+
AMDAthlon1.00/1.13/1.20/1.33/1.40GHz
External Frequency: 100 MHz
AMDAthlon750/800/850/900/950 MHz,1.00/1.10/1.20/1.30/1.40GHz
AMDDuron750/800/850/900/950MHz, 1.00/1.10/1.20/1.30 GHz
Mouse Port: one port with 6 pins
Keyboard Port: one port with 6 pins
Parallel Port: one port with 25 pins
Serial Port: one port with 9 pins
VGA Port: one port with 15 pins
USB Port: four ports with 4 pins respectively
LANPort: one port with8pins (10Mbps/100Mbps)(MK35VN only)
Line-In & Line-Out & Mic-In Ports: one port for each
DIMM Memory (optional): DDR 266 256 MB*2
Power Cable: Detachable and Shielded (with a GND pin)
Monitor: CRT+DVI
Maximum Resolution: 1280 X 1024 V:60Hz
All CPUs have completely been tested, and values offered by the worst EMI combination of
CPU external frequency are listed as follows:
Test Mode
1
2
3
4
5
6
7
8
External Frequency
133 MHz
133 MHz
133 MHz
133 MHz
100 MHz
100 MHz
100 MHz
100 MHz
CPU
AthlonXP2600+
AthlonXP2600+
Athlon 1.4 GHz
Athlon 1.4 GHz
Athlon 1.4 GHz
Athlon 1.4 GHz
Duron 1.2 GHz
Duron 1.2 GHz
Case Open/Closed
Closed
Open
Closed
Open
Closed
Open
Closed
Open

(C) Remedy for the Tested Product & Its EMI Interference:
Remedy:N/A
EMIInterference:
Crystal:14.318 MHz(X1)/32.768 KHz(X3)/24.576MHz(X2)/25.000 MHz(X4)
Clock Generator: GEN1
(D)Difference between MK35VN andMK35V:
To discriminate MK35VN from MK35V lies in the extent that chips in MK35VN support LAN,
and the combination for testing is based on MK35VN.
(E) Supported Host Peripherals:
(F) Notices for Assembling Computers:
1. Cases should be made of iron or other metal that has good electric conductivity.
2. Cylinders in a case should be made of metal, and as having a mainboard mounted
in a case, make sure screws are all utilized and fastened on a mainboard.
3. An I/O shielding should be contacted with I/O metallic parts of a mainboard.
4. Cables should appropriately be arranged and fixed in a case. Follow instructions:
Ø Leave IDE cables not crossed upon CPU and SDRAM;
Ø Leave power cables minimum in length, and not crossed upon a mainboard;
Ø Leave CPU fan cables minimum in length, and not near CPU;
Ø Leave cables on panels and other spare cables tied in a computer case.
5. Make sure an EMI shielding attached to a case has properly been installed.
6. Make sure a 5.25" or 3.5" FDD and screws are fastened to an EMI shielding.
7. Make sure a case is closely in contact with EMI connected points.
8. Make sure there is no cleft in a case which is not deformed.
9. Make sure a PCI orAGP door is bound to a case.
10. Make sure cables of other devices (fans or some others) are fixed in a case.
Host Peripheral Product Name Model Name S/N FCC ID
#1 Case AK32V
#2 Seventeam Power
Supply (switchable) ST-250HK
#3 IBM HDD (82.3GB) IC35L080AVVA07-0 A4DEENPG 3902I082
#4 MITSUMI FDD D353M3
#5 SONY CD-ROM Player CDU4811 3892A291
#6 Shuttle AGP Card CV22 (registered no.: D33032)

- 1 -
WHAT'S IN THE MANUAL.................................................................... 5
Quick Reference............................................................................................... 5
About This Manual............................................................................................ 5
1 INTRODUCTION................................................................................ 6
1.1 TO DIFFERENT USERS ............................................................................. 6
FIRST-TIMEDIYSYSTEMBUILDER............................................................ 6
EXPERIENCEDDIY USER.......................................................................... 6
SYSTEMINTEGRATOR............................................................................... 6
1.2 ITEM CHECKLIST....................................................................................... 7
2 FEATURES ........................................................................................ 8
2.1 SPECIFICATIONS ....................................................................................... 8
3 HARDWARE INSTALLATION .......................................................... 11
3.1 STEP BY STEP INSTALLATION................................................................11
STEP1InstalltheCPU.......................................................................... 12
STEP 2 Set Jumpers............................................................................. 13
STEP3 Install DDR SDRAM System Memory........................................ 13
STEP4 Install InternalPeripheralsinSystem Case ................................ 14
STEP5 Mount theMainboardon the Computer Chassis ........................ 15
STEP6Connect Front Panel LEDs/Switches/USB ................................ 16
STEP7ConnectIDEand Floppy Disk Drives ........................................ 17
STEP8 ConnectOtherInternal Peripherals............................................ 18
STEP9Connect the Power Supply........................................................ 19
STEP10 InstallAdd-onCards in Expansion Slots .................................. 19
STEP11 Connect External Peripherals toBackPanel ........................... 20
STEP12 Install Drivers&Software Components ................................... 21
TABLE OF CONTENTS

- 2 -
3.2 JUMPER SETTINGS ................................................................................. 22
JUMPERS& CONNECTORS GUIDE.................................................... 23
Jumpers
Clear CMOS Setting (JP1) ................................................................... 25
BIOSFlash Protection Setting (JP3) ...................................................... 26
CPUFrequencySetting(JP5)................................................................ 26
Back Panel Connectors
PS/2Mouse & PS/2 Keyboard Port Connectors .................................... 27
ParallelPort Connector.......................................................................... 27
COM1Port Connector ........................................................................... 27
VGAPort Connector .............................................................................. 27
USB1/2/3/4Port Connectors ................................................................. 28
LANPortConnector (MK35VNOnly) ...................................................... 28
Line-InPortConnector ........................................................................... 28
Line-OutPort Connector ........................................................................ 28
Mic-InPort Connector ............................................................................ 28
Front Panel Connectors
HDD LED Connector (HDLED) ............................................................. 29
HardwareReset Connector(RST) ......................................................... 29
GreenLED Connector (GRNLED) ......................................................... 30
ATXPower On/OffSwitchConnector (PWRSW).................................... 30
FrontPanel MicrophoneandLine-Out Header(AUDIO1) ....................... 31
ExtendedUSB Header (USB3).............................................................. 31
Internal Peripheral Connectors
EnhancedIDE and FloppyConnectors(IDE1/IDE2 &FDD1).................. 32
Other Connectors
ATXPower Supply Connector(ATX1).................................................... 33

- 3 -
CPUand Chassis Fan Connectors (CPUFAN1/CASFAN1).................... 34
InternalSpeaker Header (SPEAKER1).................................................. 34
IRHeader(IR1)...................................................................................... 35
AudioCD_INConnector(CD1).............................................................. 35
3.3 SYSTEM MEMORY CONFIGURATION ..................................................... 36
1.INSTALLMEMORY ............................................................................ 36
2.UPGRADE MEMORY........................................................................ 36
4 SOFTWARE UTILITY ......................................................................37
4.1 Mainboard CD Overview ......................................................................... 37
4.2 Install Mainboard Software ..................................................................... 38
4.2.A Install VIA 4in1 Driver.................................................................... 39
4.2.B Install VIA VGA Driver ................................................................... 40
4.2.C Install VIA Audio Driver................................................................. 41
4.2.D Install VIA USB2.0 Driver.............................................................. 42
4.2.E Install VIA LAN Driver (MK35VN Only) ......................................... 43
4.3 View the User's Manual........................................................................... 44
5 BIOS SETUP ...................................................................................45
5.1 ENTER BIOS ............................................................................................. 45
5.2 THE MAIN MENU ...................................................................................... 46
STANDARD CMOS FEATURES ............................................................... 48
ADVANCED BIOS FEATURES................................................................. 51
ADVANCED CHIPSET FEATURES .......................................................... 54
INTEGRATEDPERIPHERALS .................................................................. 57
POWERMANAGEMENT SETUP.............................................................. 60
PNP/PCICONFIGURATIONS .................................................................... 64
PCHEALTH STATUS ................................................................................ 66

- 4 -
FREQUENCY/VOLTAGECONTROL ......................................................... 67
LOAD FAIL-SAFE DEFAULTS .................................................................. 67
LOADOPTIMIZED DEFAULTS ................................................................. 67
SETSUPERVISOR/USER PASSWORD................................................... 68
SAVE & EXIT SETUP................................................................................ 68
EXITWITHOUTSAVING ............................................................................ 68

- 5 -
Quick Reference
Hardware Installation >> Step-by-Step................................................. Page 11
Jumper Settings >> A Closer Look.......................................................Page 22
Drivers/Software Utilities >> How to Install..........................................Page 37
BIOS Setup >> How to Configure.........................................................Page 45
About This Manual
For First-Time DIY System Builder .........................................................Page 6
For Experienced DIY User ......................................................................Page 6
For System Integrator .............................................................................Page 6
WHAT'S IN THE MANUAL

- 6 -
1INTRODUCTION
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 the 3.1 Hardware Installation section
in a step-by-step fashion for all the first-time DIY system builders. Prior to instal-
lation, we also suggest you to read the whole manual carefully to gain a com-
plete understanding of your new Shuttle MK35V/MK35VN mainboard.
Experienced DIY User
Congratulate on your purchase of the Shuttle MK35V/MK35VN mainboard.
You will find that installing your new Shuttle MK35V/MK35VN mainboard is
just easy. Bundled with an array of onboard functions, the highly-integrated
MK35V/MK35VN mainboard provides you with a total solution to build the
most stable and reliable system. Refer to sections 3.2 Jumper Settings and
Chapter 4 Drivers/Software Utilities to find out how to get the best out of
your new mainboard. Chapter 5 BIOS Setup also contains the relevant infor-
mation on how to tune up your system to achieve higher performance.
System Integrator
You have wisely chosen Shuttle MK35V/MK35VN to construct your system.
Shuttle MK35V/MK35VN incorporates all the state-of-the-art technology of
the KM266 chipset from VIA. It integrates the most advanced functions you
can find to date in a compact micro ATX board.
This manual is all-purpose for two kinds of mainboards: MK35V and
MK35VN. The main difference between them is that MK35VN is
equipped with an onboard LAN. In the manual, if there are some
standards, characteristics, equipment, or software adopted only by
MK35VN, it will be highlighted in brackets.

- 7 -
1.2 Item Checklist:
Check all items with your MK35V/MK35VN mainboard to make sure nothing
is missing. The complete package should include:
-One piece of Shuttle MK35V/MK35VN Mainboard
-One piece of ATA 133/100/66/33 Ribbon Cable
-One piece of Floppy Ribbon Cable
-One piece of twin ports USB Cable (optional)
-MK35V/MK35VN User's Manual
-I/O Shielding
-One piece of Bundled CD-ROM with containing:
ØMK35V/MK35VN user's manual saved in PDF format
ØVIA 4in1 Driver
ØVIA VGA Driver
ØVIA LAN Driver (MK35VN Only)
ØVIA Audio Driver
ØVIA USB2.0 Driver
ØAward Flashing Utility
VT8235
0305CDCHINA
UJ760371
0226
950902AF
VT1612A
PSKBM1
COM1
LPT1
VGA1
USBIEEE1
USBLAN1
JS1
CD1 1
CNR1
AGP1
PCI1
PCI2
USB3 1
JP1 1
JP51
PANEL1
1
BAT1
IDE2IDE1
11
SPEAKER1
1
IR1
FDD1CASFAN1
1
1
CPUFAN1
1
ATX1
1
1
JP3
DIM1 DIM2
1
AUDIO1
1
PhoenixBios
D686BIOS

- 8 -
MK35V/MK35VN mainboard is carefully designed for the demanding PC user who wants
high performance and maximum intelligent features in a compact package.
2.1 Specifications
-CPU Support
Support Socket462 package CPU.
AMD AthlonXP/Athlon/Duron Processor with 200/266 MHz FSB.
-Chipset
Features VIA KM266 N.B. and VIA VT8235 S.B..
-Onboard Graphical Controller
The VIA KM266 integrates a full featured S3 ProSavage8 128-bit 2D/3D AGP
controller.
-Onboard 10/100Mb/s LAN (MK35VN Only)
The VIA VT6103 incorporated provides the mainboard with integrated 10/
100 Mbps Fast Ethernet capabilities.
-AC'97 Link for Audio and Telephony CODEC
AC'97 2.2 compliant.
Spread independent PCI functions for Audio and Modem.
-CPU FSB Configuration
Soft-configuration FSB (The FSB speed is software configurable from 100MHz
to 133MHz.)
-Versatile Memory Support
Two 184-pin DIMM slots to support max 2GB of PC1600/PC2100 compli-
ant with DDR SDRAM module.
-PCI Expansion Slots
Provides two 32-bit PCI slots.
-AGP Expansion Slot
Provides one AGP 2.0 compliant slot which supports 1X/2X/4X AGP devices.
2 FEATURES

- 9 -
-CNR Expansion Slot
Provides one CNR (Communications and Networking Riser) slot used to
insert CNR cards with modem and audio functionality.
-6 USB 2.0 Interface Onboard
4 * USB connectors on back panel and 1 set of dual USB ports header on mid-
board.
-I/O Interface
Provides a variety of I/O interfaces:
Ø1* PS/2 mouse connector.
Ø1* PS/2 keyboard connector.
Ø1* DB25 parallel port.
Ø1* serial port.
Ø1* VGA port.
Ø1* LAN port. (MK35VN only)
Ø1* Line-In port.
Ø1* Line-Out port.
Ø1* Mic-In port.
-PCI Bus Master IDE Controller Onboard
Two Ultra DMA 133/100/66/33 Bus Master Dual-channel IDE ports provide
support to a maximum of four IDE devices (one Master and one Slave per chan-
nel). The IDE Bus implements data transfer speeds of up to 133/100/66/33
MB/sec and also supports Enhanced PIO Modes. 80-pin Cable Backward Com-
patible 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. It supports Suspend and Soft-On/Off modes by the dual-function
power button.
-Advanced Configuration and Power Interface
Features three power saving modes: S1 (Snoop), 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.

- 10 -
-System BIOS
Provides licensed Award BIOS V6.0 PG on Intel Firmware Hub 2Mb Flash
core and supports Green PC, Desktop Management Interface (DMI).
-Form Factor
System board conforms to Micro ATX specification.
Board dimension: 244 mm * 230 mm.
-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/AGP/PCI Clock Setting - These items allow users to adjust
CPU Host/AGP/PCI Clock 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.

- 11 -
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
Accessories Of MK35V/MK35VN
3HARDWAREINSTALLATION
VT8235
0305CD CHINA
UJ760371
0226
950902AF
VT1612A
PSKBM1
COM1
LPT1
VGA1
USBIEEE1
USBLAN1
JS1
CD1 1
CNR1
AGP1
PCI1
PCI2
USB3 1
JP1 1
JP5
1
PANEL1
1
BAT1
IDE2IDE1
11
SPEAKER1
1
IR1
FDD1CASFAN1
1
1
CPUFAN1
1
ATX1
1
1
JP3
DIM1 DIM2
1
AUDIO1
1
PhoenixBios
D686 BIOS
PS/2 Mouse & PS/2
Keyboard Port Connectors
COM1 Port Connector
Parallel Port Connector
VGA1 Port Connector
CPUFAN1
ATX Power
Connector -ATX1
Socket 462
Two DIMM Slots
USB Port Connectors
LAN(MK35VN Only) &
USB Port Connectors
VIA KM266 Chipset
Line-In & Line-Out &
Mic-In Port Connectors
Two IDE Connectors
Front Panel Microphone &
Line-Out Header - AUDIO1
OneAGP4X Slot
Two PCI Slots
Audio CD_IN
Connector - CD1
Extended USB
Header - USB3
VIA VT8235 Chipset
One CNR Slot
Clear CMOS Jumper - JP1
CPU Frequency Jumper - JP5
Front Panel Header - PANEL1
CASFAN1
Floppy Connector
Internal Speaker Header - SPEAKER1
IR Header - IR1
BIOS Flash Protection
Jumper - JP3
VIA VT6103
(MK35VN Only)

- 12 -
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 following
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 al-
ready mounted on your CPU, you must purchase the heatsink/fan separately
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 hardware moni-
toring 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 supported. An-
other type of CPU fan may feature a large 4-pin fan power connector, which
does not support CPU fan's speed detection and must be directly connected
to the system's power supply unit. Please refer to the following diagram.
S
O
C
K
E
T
4
6
2
ASSEMBLED IN MALAYSIA
Lever
Blank
S
O
C
K
E
T
4
6
2
Blank
AMD CPU
Notch

- 13 -
Step 2.
Set Jumpers
The default jumper settings have been set for the common usage standard of
this mainboard. Therefore, you do not need to reset the jumpers unless you
require special adjustments as any of the following cases:
1. Clear CMOS
2. BIOS Flash Protection
3. CPU Frequency
For first-time DIY system builders, we recommend that you do not change the
default jumper settings if you are not totally familiar with the mainboard
configuration procedures. The factory-set default settings are tuned for opti-
mum system performance. For the advanced users who wish to customize
their system, section 3.2 Jumper Settings will provide 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 any one or two
DIMM banks. Note that SDRAM modules are directional and will not go in
the DIMM banks if they are not properly oriented. After the module is fully
inserted into the DIMM bank, lift the clips of both sides of the DIMM bank to
lock the module in place.
DDR SDRAM

- 14 -
Step 4
Install Internal Peripherals in System Case
Before you install and connect the mainboard into your system case, we
recommend that you first assemble all the internal peripheral devices into the
computer housing, including but not limited to the hard disk drive (IDE/
HDD), floppy disk drive (FDD), CD-ROM drive, and ATX power supply unit.
This will greatly facilitate in making the connections to the mainboard de-
scribed below.
To install IDE & FDD drives, follow this procedure:
1. Set the required jumpers on each device according to the instructions
provided by the manufacturer. (IDE devices, 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 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 both on the mainboard IDE or FDD connector 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
directional and cannot fit in if not properly positioned.

- 15 -
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.