ASROCK 775Dual-915GV User manual

11
11
1
775Dual-915GV
User Manual
Version 1.0
Published August 2005
Copyright©2005 ASRock INC. All rights reserved.

22
22
2
Copyright Notice:Copyright Notice:
Copyright Notice:Copyright Notice:
Copyright Notice:
No part of this manual may be reproduced, transcribed, transmitted, or translated in
any language, in any form or by any means, except duplication of documentation by
the purchaser for backup purpose, without written consent of ASRock Inc.
Products and corporate names appearing in this manual may or may not be regis-
tered trademarks or copyrights of their respective companies, and are used only for
identification or explanation and to the owners’ benefit, without intent to infringe.
Disclaimer:Disclaimer:
Disclaimer:Disclaimer:
Disclaimer:
Specifications and information contained in this manual are furnished for informa-
tional use only and subject to change without notice, and should not be constructed
as a commitment by ASRock. ASRock assumes no responsibility for any errors or
omissions that may appear in this manual.
With respect to the contents of this manual, ASRock does not provide warranty of
any kind, either expressed or implied, including but not limited to the implied warran-
ties or conditions of merchantability or fitness for a particular purpose.
In no event shall ASRock, its directors, officers, employees, or agents be liable for
any indirect, special, incidental, or consequential damages (including damages for
loss of profits, loss of business, loss of data, interruption of business and the like),
even if ASRock has been advised of the possibility of such damages arising from any
defect or error in the manual or product.
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that
may cause undesired operation.
ASRock Website: http://www.asrock.com

33
33
3
ContentsContents
ContentsContents
Contents
1 Introduction1 Introduction
1 Introduction1 Introduction
1 Introduction ......................................................................................................
......................................................................................................
................................................... 55
55
5
1.1 Package Contents.......................................................... 5
1.2 Specifications................................................................ 6
1.3 Supported AGP VGA Cards Lists for AGI Slot.............. 9
1.4 Supported PCI Express VGA Cards Lists for AGI
Express Slot (PCI Express x 4)..................................... 11
1.5 Motherboard Layout ...................................................... 12
1.6 ASRock 8CH I/O............................................................. 13
2 Installation2 Installation
2 Installation2 Installation
2 Installation............................................................................................................
............................................................................................................
...................................................... 1414
1414
14
2.1 Screw Holes ................................................................. 14
2.2 Pre-installation Precautions........................................... 14
2.3 CPU Installation .............................................................. 15
2.4 Installation of Heatsink and CPU fan ............................. 17
2.5 Installation of Memory Modules (DIMM)......................... 18
2.6 Expansion Slots............................................................. 20
2.7 Surround Display Feature ............................................. 21
2.8 Jumpers Setup .............................................................. 21
2.9 Onboard Headers and Connectors .............................. 22
2.10 Serial ATA (SATA) Hard Disks Installation ................... 25
3 BIOS S3 BIOS S
3 BIOS S3 BIOS S
3 BIOS SETUP UTILITYETUP UTILITY
ETUP UTILITYETUP UTILITY
ETUP UTILITY......................................................................................
......................................................................................
........................................... 2626
2626
26
3.1 Introduction .................................................................... 26
3.1.1 BIOS Menu Bar .................................................... 26
3.1.2 Navigation Keys ................................................... 27
3.2 Main Screen................................................................... 27
3.3 Advanced Screen ......................................................... 28
3.3.1 CPU Configuration................................................ 28
3.3.2 Chipset Configuration .......................................... 30
3.3.3 ACPI Configuration ............................................... 32
3.3.4 IDE Configuration ................................................. 33
3.3.5 PCIPnP Configuration ........................................... 35
3.3.6 Floppy Configuration ........................................... 36
3.3.7 Super IO Configuration ........................................ 36
3.3.8 USB Configuration ............................................... 38
3.4 Hardware Health Event Monitoring Screen .................. 38
3.5 Boot Screen................................................................... 39
3.5.1 Boot Settings Configuration.................................. 39
3.6 Security Screen ............................................................ 40
3.7 Exit Screen .................................................................... 41

44
44
4
4 Software Support4 Software Support
4 Software Support4 Software Support
4 Software Support ......................................................................................
......................................................................................
........................................... 4242
4242
42
4.1 Install Operating System ............................................... 42
4.2 Support CD Information ................................................. 42
4.2.1 Running Support CD ............................................ 42
4.2.2 Drivers Menu........................................................ 42
4.2.3 Utilities Menu ........................................................ 42
4.2.4 “LGA775 CPU Installation LiveDemo” Program .. 42
4.2.5 Contact Information.............................................. 42

55
55
5
Chapter 1 IntroductionChapter 1 Introduction
Chapter 1 IntroductionChapter 1 Introduction
Chapter 1 Introduction
Thank you for purchasing ASRock 775Dual-915GV motherboard, a reliable
motherboard produced under ASRock’s consistently stringent quality control. It de-
livers excellent performance with robust design conforming to ASRock’s commit-
ment to quality and endurance. In this manual, chapter 1 and 2 contain introduction of
the motherboard and step-by-step guide to the hardware installation. Chapter 3 and
4 contain the configuration guide to BIOS setup and information of the Support CD.
Because the motherboard specifications and the BIOS software might be
updated, the content of this manual will be subject to change without
notice. In case any modifications of this manual occur, the updated
version will be available on ASRock website without further notice. You
may find the latest memory and CPU support lists on ASRock website as
well. ASRock website http://www.asrock.com
1.1 Package Contents1.1 Package Contents
1.1 Package Contents1.1 Package Contents
1.1 Package Contents
ASRock 775Dual-915GV Motherboard
(Micro ATX Form Factor: 9.6-in x 9.6-in, 24.4 cm x 24.4 cm)
ASRock 775Dual-915GV Quick Installation Guide
ASRock 775Dual-915GV Support CD
(including LGA 775 CPU Installation Live Demo)
One 80-conductor UltraATA 66/100 IDE Ribbon Cable
One Ribbon Cable for a 3.5-in Floppy Drive
One SerialATA (SATA) Data Cable (Optional)
One SerialATA (SATA) HDD Power Cable (Optional)
OneASRock 8CH I/O
One COM Port Bracket
One ASRock MR Card (Optional)

66
66
6
1.21.2
1.21.2
1.2 SpecificationsSpecifications
SpecificationsSpecifications
Specifications
Platform - Micro ATX Form Factor: 9.6-in x 9.6-in, 24.4 cm x 24.4 cm
CPU - 775-Pin Socket supporting Intel®Pentium® 4 / Celeron®D
processor (in 775-land LGA package)
- FSB 800/533 MHz
- Supports EM64T CPU
- Supports Hyper-Threading Technology (see CAUTION 1)
Chipset - Northbridge: Intel®915GV chipset
- Southbridge: Intel®ICH6
Memory -Dual ChannelDDR/DDRII Memory Technology
(see CAUTION 2)
- 2 xDDRDIMM slots
- SupportDDR400/333
- Max. capacity: 2GB
- 2 xDDRIIDIMM slots
- SupportDDRII533 (see CAUTION 3)
- Max. capacity: 2GB
Hybrid Booster - CPU Frequency Stepless Control (see CAUTION 4)
-ASRock U-COP (see CAUTION 5)
- Boot Failure Guard (B.F.G.)
Expansion Slot - 2 x PCI slots
- 1 x AGI [ASRock Graphics Interface] slot (see CAUTION 6)
- 1 x AGI Express slot (PCI Express x 4) for PCI Express x 16
graphics card (see CAUTION 7)
- 1 x AMR slot
Graphics - IntelGraphics Media Accelerator 900 VGA
- DirectX 9.0 VGA
- Pixel Shader 2.0
- Max. shared memory 192MB (see CAUTION 8)
Audio - Realtek ALC850 7.1 channel AC’97 audio codec
LAN - Realtek PCI LAN 8100C
- Speed: 10/100 Ethernet
- Supports Wake-On-LAN
Rear Panel I/O ASRock 8CH I/O
- 1 x PS/2 Mouse
- 1 x PS/2 Keyboard Port
- 1 x VGA Port
- 1 x Parallel Port (ECP/EPP Support)
- 4 x Ready-to-Use USB 2.0 Ports

77
77
7
- 1 x RJ-45 Port
- Audio Jack: Side Speaker/Rear Speaker/Central Bass/Line
in/Front Speaker/Microphone (see CAUTION 9)
Connector - 4 x Serial ATA 1.5Gb/s connectors
(No Support for “RAID” and “Hot Plug” functions)
- 1 x ATA100 IDE connector (supports 2 x IDE devices)
- 1 x Floppy connector
- 1 x COM Port header
- CPU/Chassis FANconnector
- 20 pin ATX power connector
- 4 pin 12V power connector
- CD in header
- Front panel audio connector
- 2 x USB 2.0 headers (support 4 USB 2.0 ports)
(see CAUTION 10)
BIOS Feature - 4MbAMI BIOS
-AMI Legal BIOS
- Supports “Plug and Play”
-ACPI 1.1 Compliance Wake Up Events
- Supports jumperfree
- SMBIOS 2.3.1 Support
Support CD - Drivers, Utilities, AntiVirus Software
Hardware - CPU Temperature Sensing
Monitor - Chassis Temperature Sensing
- CPU Overheat Shutdown to Protect CPU Life
- CPU FanTachometer
- Chassis Fan Tachometer
- Voltage Monitoring: +12V, +5V, +3.3V, Vcore
OS - Microsoft® Windows® 2000 / XP / XP 64-bit compliant
Certifications - FCC, CE, WHQL

88
88
8
CAUTION!
1. About the setting of “HyperThreading Technology”, please check page 29.
2. This motherboard supports Dual Channel Memory Technology. Before you
implement Dual Channel Memory Technology, make sure to read the
installation guide of memory modules on page 18 for proper installation.
3. This motherboard doesn’t support 128Mbit DRAM Cell (128MB/8 cells;
256MB/16 cells).
4. Although this motherboard offers stepless control, it is not recommended
to perform over-clocking. Frequencies other than the recommended CPU
bus frequencies may cause the instability of the system or damage the
CPU.
5. While CPU overheat is detected, the system will automatically shutdown.
Before you resume the system, please check if the CPU fan on the
motherboard functions properly and unplug the power cord, then plug it
back again. To improve heat dissipation, remember to spray thermal
grease between the CPU and the heatsink when you install the PC system.
6. The AGI [ASRock Graphics Interface] slot is a special design that only
supports compatible AGP VGA cards. For the information of the
compatible AGP VGA cards, please refer to the “Supported AGP VGA
Card List for AGI Slot” on page 9 and page 10. For the proper
installation of AGP VGAcard, please refer to the installation guide on
page 20.
7. For the information of the compatible PCI Express VGA cards, please
refer to the “Supported PCI Express VGA Card List for AGI Express Slot
(PCI Express x 4)” on page 11. For the proper installation of PCI Express
VGA card, please refer to the installation guide on page 20.
8. The Max. shared memory of onboard VGA is controlled by Intel VGA
driver. Installing different Intel VGA driver may vary its Max. shared
memory capacity.
9. For microphone input, this motherboard supports both stereo and mono
modes. For audio output, this motherboard supports 2-channel, 4-channel,
6-channel, and 8-channel modes. Please check the table on page 13 for
proper connection.
10. Power Management for USB 2.0 works fine under Microsoft®Windows®XP
SP1 or SP2 / 2000 SP4.

99
99
9
1.31.3
1.31.3
1.3 Supported AGP VGA Card List for AGI SlotSupported AGP VGA Card List for AGI Slot
Supported AGP VGA Card List for AGI SlotSupported AGP VGA Card List for AGI Slot
Supported AGP VGA Card List for AGI Slot
(for Windows 2000/Windows XP)
I. AGP 4X
Graphics Chip Model Name Chipset Name
Vendor
n-VIDIA ASUS V8170 GeForce MX440SE
Ennyah G2 MX400 GeForce 2 MX400
ATI POWERCOLOR Radeon 9100 Radeon 9100
For the latest updates of the supported AGP VGA card list for AGI slot, please
visit ASRock website for details.
ASRock website: http://www.asrock.com/support/index.htm

1010
1010
10
II. AGP 8X
Graphics Chip Model Name Chipset Name
Vendor
n-VIDIA ASUS V9480 GeForce 4 Ti4800SE
ASUS V9570/TD GeForce FX 5700
ASUS V9950ULTRA GeForce FX 5900 Ultra
ASUS V9520-X/128M GeForce FX 5200
ASUS V9400MAGIC GeForce 4 MX4000
ALBATRON MX-480E GeForce 4 MX440-8X
ALBATRON FX5600P Turbo GeForce FX 5600
ELSA GLADIAC 518BL GeForce 4 MX4000
EnnyahGEFORCE FX5200 ULTRA GeForce FX 5200 Ultra
GIGABYTE GV-N66128DP GeForce 6600
GIGABYTE GV-N57L256D GeForce FX 5700 LE
LEADTEK WINFAST A340TDH GeForce FX 5200
LEADTEK WinFast A340/PROTD GeForce FX 5500
LEADTEK WinFast A360TD GeForce FX 5600
Leadtek WinFast A6600 GT TDH GeForce 6600GT
LEADTEK WinFast A400TDH GeForce 6800
MSI Ti4200-TD8X GeForce 4 Ti4200
MIS FX5700-TD128 GeForce FX 5700
ATI ELSA FALCOX 920FX Radeon 9200
GECUBE Radeon 9250/128M Radeon9250
POWERCOLOR Radeon 9200SE Radeon 9200SE
POWERCOLOR RADEON 9250/128M Radeon 9250
For the latest updates of the supported AGP VGA card list for AGI slot, please
visit ASRock website for details.
ASRock website: http://www.asrock.com/support/index.htm
Note. ATi 9600, 9550 series, and all Matrox series VGA cards are NOT supported
with AGI.

1111
1111
11
1.41.4
1.41.4
1.4 Supported PCI Express VGA Card List for AGISupported PCI Express VGA Card List for AGI
Supported PCI Express VGA Card List for AGISupported PCI Express VGA Card List for AGI
Supported PCI Express VGA Card List for AGI
Express Slot (PCI Express x 4)Express Slot (PCI Express x 4)
Express Slot (PCI Express x 4)Express Slot (PCI Express x 4)
Express Slot (PCI Express x 4)
(for Windows 2000/Windows XP)
Graphics Chip Model Name Chipset Name
Vendor
n-VIDIA ASUS Extreme N5900 GeForce PCX5900
ASUS EN6200GE GeForce 6200
ASUS EN6200 GeForce 6200
ASUS EN6800GT GeForce 6800GT
ASUS EN6800 GeForce 6800
ALBATRON PC6600GT GeForce 6600GT
GIGABYTE GV-NX62128D GeForce 6200
GIGABYTE GV-NX66128D GeForce 6600
LEADTEK PX6200 TC/TDH GeForce 6200TC
MSI PCX 5750-TD128 GeForce PCX5750
SPARKLE GeFORCE 6200TC GeForce 6200TC
ATi ASUS EAX700PRO/TVD Radeon X700 PRO
ASUS EAX800XL Radeon X800 XL
ABIT X600XT Radeon X600 XT
GECUBE GC-RX300-C3 RADEON X300 SE
GECUBE X850XT-VIVO Radeon X850 XT
GIGABYTE GV-RX60P128D RADEON X600PRO
MSI X800XT Radeon X800 XT
POWERCOLOR X300 SE Radeon X300 SE
For the latest updates of the supported PCI Express VGA card list for AGI Express
slot (PCI Express x 4), please visit ASRock website for details.
ASRock website: http://www.asrock.com/support/index.htm
Note. Turbo cache PCI Express x 16 VGA cards are not recommanded to use.

1212
1212
12
1.5 Motherboard Layout1.5 Motherboard Layout
1.5 Motherboard Layout1.5 Motherboard Layout
1.5 Motherboard Layout
`
Intel
915GV
Chipset
Intel
ICH6
ATX12V1
1
PS2_USB_PWR1
Top:
REAR SPK
Center:
SIDE SPK
Bottom:
CTR BASS
USB 2.0
T: USB 0
B: USB1
Top:
RJ-45
USB 2.0
T: USB 2
B: USB3
PARALLEL PORT
VGA
PS2
Mouse
PS2
Keyboard
CD1
Top:
LINE IN
Center:
FRONT
Bottom:
MIC IN
Dual Channel
DDRII533
775Dual-915GV
PCI
EXPRESS
ATXPWR1
DDRII DIMM1 (64/72 bit, 240-pin module)
DDR DIMM1 (64/72 bit, 184-pin module)
DDRII DIMM2 (64/72 bit, 240-pin module)
DDR DIMM2 (64/72 bit, 184-pin module)
AGI_EXPRESS1
AGI
ATA133
USB2.0
SATA
PCI 2
PCI 1
CMOS
Battery
CLRCMOS1
1
FLOPPY1
7.1CH
Super
I/O
4Mb
BIOS
CPU_FAN1
CHA_FAN1
IDE1
AMR1
1
COM1
LAN PHY
1
AUDIO1
JR1 JL1
AUDIO
CODEC
USB67
11
USB45
11
SPEAKER1
1
PANEL1
HDLED RESET
PLED PWRBTN
1
SATA2
SATA1
SATA3
SATA4
24.4cm (9.6 in)
24.4cm (9.6 in)
21 46
357
14
10
11
8
12
13
9
20
22 21
15
16
17
18
19
23
24
27
28
25
26
29
30
31
IR1
1
1 PS2_USB_PWR1 Jumper 16 USB 2.0 Header (USB67, Blue)
2 ATX 12V Connector (ATX12V1) 17 Chassis Fan Connector (CHA_FAN1)
3 775-Pin CPU Socket 18 Chassis Speaker Header (SPEAKER 1)
4 CPU Fan Connector (CPU_FAN1) 19 System Panel Header (PANEL1)
5 2 x 240-pin DDRII DIMM Slots 20 South Bridge Controller
(Dual Channel A: DDRII1, DDRII2; Yellow) 21 North Bridge Controller
6 2 x 184-pin DDR DIMM Slots 22 ASRock Graphics Interface Slot (AGI)
(Dual Channel B: DDR1, DDR2; Blue) 23 COM Port Header (COM1)
7 Infrared Module Connector (IR1) 24 AMR Slot (AMR1)
8 BIOS FWH Chip 25 JR1 / JL1 Jumpers
9 Primary IDE Connector (IDE1, Black) 26 Front Panel Audio Header (AUDIO1)
10 Floppy Connector (FLOPPY1) 27 PCI Slots (PCI1- 2)
11 Fourth Serial ATA Connector (SATA4, black) 28 Clear CMOS Jumper (CLRCMOS1)
12 Third Serial ATA Connector (SATA3, black) 29 AGI Express Slot (PCI Express x 4)
13 Secondary Serial ATA Connector (SATA2, blue) 30 Internal Audio Connector: CD1 (Black)
14 Primary Serial ATA Connector (SATA1,blue) 31 ATX Power Connector (ATXPWR1)
15 USB 2.0 Header (USB45, Blue)

1313
1313
13
12
4
3
5
7
6
8
10 9
11
1213
1.61.6
1.61.6
1.6 ASRock 8CH I/OASRock 8CH I/O
ASRock 8CH I/OASRock 8CH I/O
ASRock 8CH I/O
1 Parallel Port 8 Microphone (Pink)
2 RJ-45 Port 9 USB 2.0 Ports (USB01)
3 Side Speaker (Gray) 10 USB 2.0 Ports (USB23)
4 Rear Speaker (Black) 11 VGAPort
5 Central/ Bass (Orange) 12 PS/2 Keyboard Port (Purple)
6 Line In (Light Blue) 13 PS/2 Mouse Port (Green)
*7 Front Speaker (Lime)
* If you use 2-channel speaker, please connect the speaker’s plug into “Front Speaker Jack”. See
the table below for connection details in accordance with the type of speaker you use.
TABLE for Audio Output Connection
Audio Output Channels Front Speaker Rear Speaker Central / Bass Side Speaker
(No. 7) (No. 4) (No. 5) (No. 3)
2 V -- -- --
4VV----
6VVV--
8VVVV

1414
1414
14
Chapter 2 InstallationChapter 2 Installation
Chapter 2 InstallationChapter 2 Installation
Chapter 2 Installation
775Dual-915GV is a MicroATX form factor (9.6" x 9.6", 24.4 x 24.4 cm) motherboard.
Before you install the motherboard, study the configuration of your chassis to en-
sure that the motherboard fits into it.
Make sure to unplug the power cord before installing or removing the
motherboard. Failure to do so may cause physical injuries to you and
damages to motherboard components.
2.1 Screw Holes2.1 Screw Holes
2.1 Screw Holes2.1 Screw Holes
2.1 Screw Holes
Place screws into the holes indicated by circles to secure the motherboard to the
chassis.
Do not over-tighten the screws! Doing so may damage the motherboard.
2.2 Pre-installation Precautions2.2 Pre-installation Precautions
2.2 Pre-installation Precautions2.2 Pre-installation Precautions
2.2 Pre-installation Precautions
Take note of the following precautions before you install motherboard components
or change any motherboard settings.
1. Unplug the power cord from the wall socket before touching any component.
2. To avoid damaging the motherboard components due to static electricity,NEVER
place your motherboard directly on the carpet or the like. Also remember to use
a grounded wrist strap or touch a safety grounded object before you handle
components.
3. Hold components by the edges and do not touch the ICs.
4. Whenever you uninstall any component, place it on a grounded antistatic pad or
in the bag that comes with the component.
Before you install or remove any component, ensure that the power is
switched off or the power cord is detached from the power supply.
Failure to do so may cause severe damage to the motherboard, peripherals,
and/or components.

1515
1515
15
2.3 CPU Installation2.3 CPU Installation
2.3 CPU Installation2.3 CPU Installation
2.3 CPU Installation
For the installation of Intel 775-LAND CPU,
please follow the steps below.
Before you insert the 775-LAND CPU into the socket, please check if
the CPU surface is unclean or if there is any bent pin on the socket.
Do not force to insert the CPU into the socket if above situation is
found. Otherwise, the CPU will be seriously damaged.
Step 1. Open the socket:
Step 1-1. Disengaging the lever by depressing
down and out on the hook to clear
retention tab.
Step 1-2. Rotate the load lever to fully open po-
sition at approximately 135 degrees.
Step 1-3. Rotate the load plate to fully open po-
sition at approximately 100 degrees.
Step 2. Insert the 775-LAND CPU:
Step 2-1. Hold the CPU by the edges where are
marked with black lines.
Step 2-2. Orient the CPU with IHS (Integrated
Heat Sink) up. Locate Pin1 and the two
orientation key notches.
775-Pin Socket Overview
black line
black line
775-PinSocket
Pin1
alignment key alignment key
Pin1
orientation
key notch orientation
key notch
775-LAND CPU

1616
1616
16
For proper inserting, please ensure to match the two orientation key
notches of the CPU with the two alignment keys of the socket.
Step 2-3. Carefully place the CPU into the socket
by using a purely vertical motion.
Step 2-4. Verify that the CPU is within the socket
and properly mated to the orient keys.
Step 3. Remove PnP Cap (Pick and Place Cap):
Use your left hand index finger and thumb to
support the load plate edge, engage PnP cap
with right hand thumb and peel the cap from the
socket while pressing on center of PnP cap to
assist in removal.
1. It is recommended to use the cap tab to handle and avoid kicking
off the PnP cap.
2. This cap must be placed if returning the motherboard for after
service.
Step 4. Close the socket:
Step 4-1. Rotate the load plate onto the IHS.
Step 4-2. While pressing down lightly on load
plate, engage the load lever.
Step 4-3. Secure load lever with load plate tab
under retention tab of load lever.

1717
1717
17
2.42.4
2.42.4
2.4 Installation of CPU Fan and HeatsinkInstallation of CPU Fan and Heatsink
Installation of CPU Fan and HeatsinkInstallation of CPU Fan and Heatsink
Installation of CPU Fan and Heatsink
This motherboard is equipped with 775-Pin socket that supports Intel 775-LAND CPU.
Please adopt the type of heatsink and cooling fan compliant with Intel 775-LAND CPU
to dissipate heat. Before you installed the heatsink, you need to spray thermal
interface material between the CPU and the heatsink to improve heat dissipation.
Ensure that the CPU and the heatsink are securely fastened and in good contact with
each other. Then connect the CPU fan to the CPU_FAN connector (CPU_FAN1, see
page 12, No. 4).
For proper installation, please kindly refer to the instruction manuals of
your CPU fan and heatsink.
Below is an example to illustrate the installation of the heatsink for 775-LANDCPU.
Step 1. Apply thermal interface material onto center
of IHS on the socket surface.
Step 2. Place the heatsink onto the socket. Ensure
fan cables are oriented on side closest to the
CPU fan connector on the motherboard
(CPU_FAN1, see page 12, No. 4).
Step 3. Align fasteners with the motherboard
throughholes.
Step 4. Rotate the fastener clockwise, then press
down on fastener caps with thumb to install
and lock. Repeat with remaining fasteners.
If you press down the fasteners without rotating them clockwise,
the heatsink cannot be secured on the motherboard.
Step 5. Connect fan header with the CPU fan
connector on the motherboard.
Step 6. Secure excess cable with tie-wrap to ensure
cable does not interfere with fan operation or
contact other components.

1818
1818
18
2.5 Installation of Memory Modules (DIMM)2.5 Installation of Memory Modules (DIMM)
2.5 Installation of Memory Modules (DIMM)2.5 Installation of Memory Modules (DIMM)
2.5 Installation of Memory Modules (DIMM)
775Dual-915GV motherboard provides two 184-pin DDR (Double Data Rate)
DIMM slots and two 240-pinDDRIIDIMM slots, and supportsDual Channel Memory
Technology. For dual channel configuration, you always need to install identi-
cal (the same brand, speed, size and chip-type)DDRDIMM pair in the slots of the
same color. In other words, you have to install identical DDRIIDIMM pair in Dual
Channel A (DDRII1 andDDRII2; Yellow slots; see p.12 No.5) or identical DDR
DIMM pair in Dual Channel B (DDR1 and DDR2; Blue slots; see p.12 No.6), so
that Dual Channel Memory Technology can be activated. You may refer to the
Dual Channel Memory Configuration Table below.
Dual Channel Memory Configurations
DDRII1 DDR1 DDRII2 DDR2
(Yellow Slot) (Blue Slot) (Yellow Slot) (Blue Slot)
(1) Populated - Populated -
(2) - Populated - Populated
1. It is not allowed to install DDR into DDRII slot or DDRII into DDR
slot;otherwise, this motherboard and DIMM may be damaged.
2. It is not allowed to install both DDR and DDRII to this motherboard
at the same time; otherwise, this motherboard and DIMM may be
damaged.
3. This motherboard doesn’t support 128Mbit DRAM Cell (128MB/8 cells;
256MB/16 cells).

1919
1919
19
notch
break
notch
break
Installing a DIMMInstalling a DIMM
Installing a DIMMInstalling a DIMM
Installing a DIMM
Please make sure to disconnect power supply before adding or
removing DIMMs or the system components.
Step 1. Unlock aDIMM slot by pressing the retaining clips outward.
Step 2. Align aDIMM on the slot such that the notch on theDIMM matches the break
on the slot.
The DIMM only fits in one correct orientation. It will cause permanent
damage to the motherboard and theDIMM if you force theDIMM into the
slot at incorrect orientation.
Step 3. Firmly insert the DIMM into the slot until the retaining clips at both ends fully
snap back in place and the DIMM is properly seated.

2020
2020
20
2.6 Expansion Slots (PCI, AMR, AGI, and AGI Express Slots2.6 Expansion Slots (PCI, AMR, AGI, and AGI Express Slots
2.6 Expansion Slots (PCI, AMR, AGI, and AGI Express Slots2.6 Expansion Slots (PCI, AMR, AGI, and AGI Express Slots
2.6 Expansion Slots (PCI, AMR, AGI, and AGI Express Slots
(PCI Express x 4))(PCI Express x 4))
(PCI Express x 4))(PCI Express x 4))
(PCI Express x 4))
There are 2 PCI slots, 1 AMR slot, 1 AGI slot, and 1AGI Express slot (PCI Express x
4) on this motherboard.
PCI slots: PCI slots are used to install expansion cards that have the 32-bit PCI
interface.
AMR slot: AMR slot is used to insert anASRock MR card (optional) with v.92
Modem functionality.
AGI slot: The AGI [ASRock Graphics Interface] slot is a special design that only
supports compatible AGP VGA cards. For the information of the compat-
ible AGP VGA cards, please refer to the “Supported AGP VGA Cards List
for AGI Slot” on page 9 and page 10.
AGI Express slot (PCI Express x 4):
AGI Express slot (PCI Express x 4) is used to install PCI Express expan-
sion cards. For the information of the compatible PCI Express VGAcards,
please refer to the “Supported PCI Express VGA Card List for AGI Ex-
press Slot (PCI Express x 4)” on page 11.
1. If you install the add-onAGP VGAcard or PCI Express VGA card,
BIOS setup will automatically disable the onboard VGA.
2. Please make sure to set the BIOS onboard VGAselection into “En
abled” if you want this motherboard to support Surround Display.
Then the onboard VGA in Windows will be the primary VGA card.
Installing an expansion cardInstalling an expansion card
Installing an expansion cardInstalling an expansion card
Installing an expansion card
Step 1. Before installing the expansion card, please make sure that the power
supply is switched off or the power cord is unplugged. Please read the
documentation of the expansion card and make necessary hardware
settings for the card before you start the installation.
Step 2. Remove the bracket facing the slot that you intend to use. Keep the screws
for later use.
Step 3. Align the card connector with the slot and press firmly until the card is
completely seated on the slot.
Step 4. Fasten the card to the chassis with screws.