DFI LanParty DK 790GX-M2RS User Manual

System Board User’s Manual

This publication contains information that is protected by copyright. No part of it may be reproduced in any form or by any means or used to make any transformation/adaptation without the prior written permission from the copyright holders.

This publication is provided for informational purposes only. The manufacturer makes no representations or warranties with respect to the contents or use of this manual and specifically disclaims any express or implied warranties of merchantability or fitness for any particular purpose. The user will assume the entire risk of the use or the results of the use of this document. Further, the manufacturer reserves the right to revise this publication and make changes to its contents at any time, without obligation to notify any person or entity of such revisions or changes.

Trademarks

Windows® 2000 and Windows® XP are registered trademarks of Microsoft Corporation. Award is a registered trademark of Award Software, Inc. Other trademarks and registered trademarks of products appearing in this manual are the properties of their respective holders.

FCC and DOC Statement on Class B

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 when the equipment is operated in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, 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 into 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.

Notice:

1. The changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.

2. Shielded interface cables must be used in order to comply with the emission limits.

Table of Contents

Warranty.................................................................................................

Static Electricity Precaution................................................................

Safety Measures.....................................................................................

About the Package...............................................................................

Before Using the System Board.........................................................

Chapter 1 - Introduction....................................................................

Specifications...................................................................................................................................

Features..............................................................................................................................................

Chapter 2 - Hardware Installation....................................................

System Board Layout ..........................................................................................................

System Memory..........................................................................................................................

CPU.......................................................................................................................................................

System Boards.............................................................................................................................

Jumper Settings............................................................................................................................

Rear Panel I/O Ports.............................................................................................................

Internal I/O Connectors.....................................................................................................

Chapter 3 - BIOS Setup......................................................................

Switchable Modes for Overclocking........................................................................

Award BIOS Setup Utility.................................................................................................

RAID BIOS.....................................................................................................................................

Updating the BIOS..................................................................................................................

Chapter 4 - Supported Software.......................................................

Chapter 5 - RAID.................................................................................

Chapter 6 - ATI CrossFire Technology.............................................

Chapter 7 - Cool’n’Quiet Technology..............................................

Appendix A - ABS................................................................................

Appendix B - Troubleshooting..........................................................

Appendix C -Debug LED POST and Troubleshooting ...............

5 6 6 7 7

8 8

15 15 16 22 27 28 31 34

47 47

48 101 102

104 124 127 136 138 146 150

Warranty

1. Warranty does not cover damages or failures that arised from misuse of the product, inability to use the product, unauthorized replacement or alteration of components and product specifications.

2. The warranty is void if the product has been subjected to physical abuse, improper installation, modification, accidents or unauthorized repair of the product.

3. Unless otherwise instructed in this user’s manual, the user may not, under any circumstances, attempt to perform service, adjustments or repairs on the product, whether in or out of warranty. It must be returned to the purchase point, factory or authorized service agency for all such work.

4. We will not be liable for any indirect, special, incidental or consequencial damages to the product that has been modified or altered.

Introduction

Static Electricity Precautions

It is quite easy to inadvertently damage your PC, system board, components or devices even before installing them in your system unit. Static electrical discharge can damage computer components without causing any signs of physical damage. You must take extra care in handling them to ensure against electrostatic build-up.

1. To prevent electrostatic build-up, leave the system board in its anti-static bag until you are ready to install it.

2. Wear an antistatic wrist strap.

3. Do all preparation work on a static-free surface.

4. Hold the device only by its edges. Be careful not to touch any of the components, contacts or connections.

5. Avoid touching the pins or contacts on all modules and connectors. Hold modules or connectors by their ends.

Important:

Electrostatic discharge (ESD) can damage your processor, disk drive and other components. Perform the upgrade instruction procedures described at an ESD workstation only. If such a station is not available, you can provide some ESD protection by wearing an antistatic wrist strap and attaching it to a metal part of the system chassis. If a wrist strap is unavailable, establish and maintain contact with the system chassis throughout any procedures requiring ESD protection.

Safety Measures

To avoid damage to the system:

• Use the correct AC input voltage range

To reduce the risk of electric shock:

• Unplug the power cord before removing the system chassis cover for installation or servicing. After installation or servicing, cover the system chassis before plugging the power cord.

Battery:

• Danger of explosion if battery incorrectly replaced.

• Replace only with the same or equivalent type recommend

the manufacturer.

• Dispose of used batteries according to local ordinance.

Introduction

About the Package

The system board package contains the following items. If any of these items are missing or damaged, please contact your dealer or sales representative for assistance.

; One system board ; One IDE cable ; One floppy cable ; Two Serial ATA data cables ; One power cable with 2 Serial ATA power connectors ; Smart connectors ; One I/O shield ; One RAID driver diskette ; One “Mainboard Utility” CD ; One user’s manual ; Auto Boost System (ABS) installation guide

The system board and accessories in the package may not come similar to the information listed above. This may differ in accordance to the sales region or models in which it was sold. For more information about the standard package in your region, please contact your dealer or sales representative.

Before Using the System Board

Before using the system board, prepare basic system components.

If you are installing the system board in a new system, you will need at least the following internal components.

• A CPU

• Memory module

• Storage devices such as hard disk drive, CD-ROM, etc.

You will also need external system peripherals you intend to use which will normally include at least a keyboard, a mouse and a video display monitor.

Introduction

Chapter 1 - Introduction

Specifications

Processor

Chipset

System Memory

Expansion Slots

BIOS

Graphics

Audio

LAN

• AMD® AM2+ processors: PhenomTM FX / Phenom

/ AthlonTM / Sempron

AMD® AM2 processors: Athlon series / Sempron

• HyperTransport 3.0 (5200MT/s for AM2+) HyperTransport 1.0 (2000/1600MT/s for AM2)

• AMD OverDrive provides tuning options using the new “Advanced Clock Calibration” overclocking feature.

• Socket 940 AM2+ 65nm

• AMD chipset

- Northbridge: AMD 790GX

- Southbridge: AMD SB750

• Four 240-pin DDR2 DIMM sockets

• Supports DDR2 667/800/1066 MHz DIMMs

• Supports dual channel (128-bit wide) memory interface

• Supports up to 8GB system memory

• Supports unbuffered non-ECC x8 and x16 DIMMs

• 2 PCI Express (Gen 2) x16 slots

- Hybrid CrossFireX

- combination of the integrated graphics

and a discrete graphics card in a PCIE slot (8-lane port).

- Two graphics cards support CrossFireXTM; each operating at

x8 (8-lane ports) bandwidth

• 1 PCI Express x1 slot

• 3 PCI slots

• Award BIOS

• CMOS Reloaded

• CPU/DRAM overclocking

• CPU/DRAM/Chipset overvoltage

• 8Mbit SPI flash memory

• Integrated ATI Radeon

HD 3300 graphics core

• One DVI-I connector for digital LCD display

• Microsoft® DirectX 10

• Hybrid CrossFireXTM technology combines the onboard GPU and a discrete PCIE graphics card

• Onboard Performance cache for added performance

• Realtek ALC885 8-channel HD Audio Codec

• High-performance DACs with 106dB dynamic range (A-Weight), ADCs with 101dB dynamic range (A-Weight)

• Marvell 88E8056 PCIE Gigabit LAN controller

• Fully compliant to IEEE 802.3 (10BASE-T), 802.3u (100BASETX) and 802.3ab (1000BASE-T) standards

Introduction

IDE

Serial ATA with RAID

Rear Panel I/O

Internal I/O

Power Management

Hardware Monitor

PCB

• One IDE connector allows connecting up to two UltraDMA 133Mbps hard drives

• Supports up to 6 SATA devices

• SATA speed up to 3Gb/s

• RAID 0/1/0+1(10)/5/JBOD/AHCI

• 1 mini-DIN-6 PS/2 mouse port

• 1 mini-DIN-6 PS/2 keyboard port

• 1 optical S/PDIF-out port

• 1 coaxial RCA S/PDIF-out por t

• 1 IEEE 1394 port

• 6 USB 2.0/1.1 ports

• 1 RJ45 LAN port

• Center/subwoofer, rear R/L and side R/L jacks

• Line-in, line-out (front R/L) and mic-in jacks

• 3 connectors for 6 additional external USB 2.0 por ts

• 1 connector for an external COM por t

• 1 connector for an external IEEE 1394 por t

• 1 DVI connector

• 1 front audio connector

• 1 CD-in connector

• 1 IrDA connector

• 1 CIR connector

• 6 Serial ATA connectors

• 1 40-pin IDE connector

• 1 floppy connector

• 1 24-pin ATX power connector

• 1 8-pin 12V power connector

• 1 4-pin 5V/12V power connector (FDD type)

• 1 front panel connector

• 6 fan connectors

• 1 diagnostic LED

• EZ touch switches (power switch and reset switch)

• ACPI and OS Directed Power Management

• ACPI STR (Suspend to RAM) function

• Wake-On-PS/2 Keyboard/Mouse

• Wake-On-USB Keyboard/Mouse

• Wake-On-Ring

• Wake-On-LAN

• RTC timer to power-on the system

• AC power failure recovery

• Monitors CPU/system/chipset temperature

• Monitors 12V/5V/3.3V/Vcore/Vbat/5Vsb/Vdimm/Vchip voltages

• Monitors the speed of the cooling fans

• CPU Overheat Protection function monitors CPU temperature during system boot-up

• ATX form factor

• 24.5cm (9.64") x 30.5cm (12")

Introduction

Features

The system board supports high performance DDR2 technology whose data transfer rate delivers bandwidth of 12.8 Gb/s and beyond. That is twice the speed of

the conventional DDR without increasing its power consumption. DDR2 SDRAM modules work at 1.8V supply compared to 2.6V memory voltage for DDR modules. DDR2 also incorporates new innovations such as the On-Die Termination (ODT) as well as larger 4-bit pre-fetch against DDR which fetches 2 bits per clock cycle.

ATI’s CrossFire

technology drives your PC to a new peak of performance by combining multiple GPUs in a single system. By connecting a Radeon CrossFire Edition graphics card and a standard PCI Express graphics card,

the power of the dual GPUs (Graphics Processing Units) within the system will accelerate your gaming performance and improve image quality.

Based on the ATI CrossFire™ multi-GPU technology, the ATI Hybrid CrossFireX™ takes gaming experience to the next level. Hybrid CrossFireX™ is

a combination of the integrated graphics and a discrete graphics card delivering high quality gaming images and improved performance. Its multi-GPU performance capabilities enhance gaming performance, productivity and platform power efficiency to the mainstream PC.

PCI Express Gen 2 is a high bandwidth I/O infrastructure that possesses the ability to scale speeds by forming multiple lanes. The x16 PCI Express lane supports transfer rate up to 5Gb/s.

HybridHybrid

Hybrid

CrossFireXCrossFireX

CrossFireX

Introduction

The northbridge chip comes integrated with the ATI RadeonTM HD 3300 graphics core delivering exceptional 3D graphics performance. It suppor ts DVI interface.

DVI (Digital Visual Interface) is a form of video interface technology made to maximize the quality of flat panel LCD monitors and modern video graphics cards. Data

is transmitted using the TMDS (Transition Minimized Differential Signaling) protocol, providing a digital signal from the PC’s graphics subsystem to the display.

The onboard Realtek ALC885 is a High Definition audio

codec and the 6 audio jacks at the rear I/O panel pro-

vides 8-channel audio output for advanced 7.1-channel

super surround sound audio system. ALC885 also supports S/PDIF output, allowing digital connections with DVD systems or other audio/video multimedia.

S/PDIF is a standard audio file transfer format that

transfers digital audio signals to a device without having

to be converted first to an analog format. This prevents

the quality of the audio signal from degrading whenever it is converted to analog. S/PDIF is usually found on digital audio equipment such as a DAT machine or audio processing device. The S/PDIF interface on the system board sends surround sound and 3D audio signal outputs to amplifiers and speakers and to digital recording devices like CD recorders.

Serial ATA is a storage interface that is compliant with

SATA 1.0 specification. It supports speed of up to 3Gb/

s. Serial ATA improves hard drive performance faster

than the standard parallel ATA whose data transfer rate is 100MB/s.

The system board allows configuring RAID on Serial ATA

devices. It supports RAID 0/1/0+1(10)/5/JBOD/AHCI.

S/PDIFS/PDIF

S/PDIF

GraphicsGraphics

Graphics

DVIDVI

DVI

RAIDRAID

RAID

Introduction

CPUCPU

CPU

OverheatOverheat

Overheat

ProtectionProtection

Protection

IrDAIrDA

IrDA

The Marvell 88E8056 PCI Express Gigabit LAN controller supports up to 1Gbps data rate.

CMOS Reloaded is a technology that allows storing multiple user-defined BIOS settings by using the BIOS utility to save, load and name the settings. This is especially

useful to overclockers who require saving a variety of overclocked settings and being able to conveniently switch between these settings simultaneously.

The options in Genie BIOS allows configuring the system to optimize system performance and overclock capability.

The presence of the power switch and reset switch on

the system board are user-friendly especially to DIY us-

ers. They provide convenience in powering on and/or re-

setting the system while fine tuning the system board before it is installed into the system chassis.

CPU Overheat Protection has the capability of monitoring the CPU’s temperature during system boot up. Once the CPU’s temperature exceeded the temperature limit pre-de-

fined by the CPU, the system will automatically shutdown. This preventive measure has been added to protect the CPU from damage and insure a safe computing environment.

The system board is equipped with an IrDA connector

for wireless connectivity between your computer and pe-

ripheral devices. The IRDA (Infrared Data Association)

specification supports data transfers of 115K baud at a distance of 1 meter.

GigabitGigabit

Gigabit

ANAN

Introduction

The system board supports USB 2.0 and USB 1.1 ports. USB 1.1 supports 12Mb/second bandwidth while USB 2.0 supports 480Mb/second bandwidth providing a

marked improvement in device transfer speeds between your computer and a wide range of simultaneously accessible external Plug and Play peripherals.

This feature allows the system that is in the Suspend

mode or Soft Power Off mode to wake-up/power-on

to respond to calls coming from an external modem or

respond to calls from a modem PCI card that uses the PCI PME (Power Management Event) signal to remotely wake up the PC.

Important:

If you are using a modem add-in card, the 5VSB power source of your power supply must support a minimum of ≥720mA.

This feature allows the network to remotely wake up a

Soft Power Down (Soft-Off) PC. It is supported via the

onboard LAN port or via a PCI LAN card that uses

the PCI PME (Power Management Event) signal. However, if your system is in the Suspend mode, you can power-on the system only through an IRQ or DMA interrupt.

Important:

The 5VSB power source of your power supply must support

≥

720mA.

This function allows you to use the PS/2 keyboard or

PS/2 mouse to power-on the system.

Important:

The 5VSB power source of your power supply must support

≥

720mA.

USBUSB

USB

2.02.0

2.0

akak

OnOn

RingRing

Ring

akak

OnOn

ANAN

akak

OnOn

PS/2PS/2

PS/2

Introduction

This function allows you to use a USB keyboard or USB mouse to wake up a system from the S3 (STR - Suspend To RAM) state.

Important:

If you are using the Wake-On-USB Keyboard/Mouse function for 2 USB ports, the 5VSB power source of your power supply must support ≥1.5A. For 3 or more USB ports, the 5VSB power source of your power supply must support ≥2A.

The RTC installed on the system board allows your system to automatically power-on on the set date and time.

The system board is designed to meet the ACPI (Advanced Configuration and Power Interface) specification. ACPI has energy saving features that enables PCs to

implement Power Management and Plug-and-Play with operating systems that support OS Direct Power Management. ACPI when enabled in the Power Management Setup will allow you to use the Suspend to RAM function.

With the Suspend to RAM function enabled, you can power-off the system at once by pressing the power button or selecting “Standby” when you shut down the system without having to go through the sometimes tiresome process of closing files, applications and operating system. This is because the system is capable of storing all programs and data files during the entire operating session into RAM (Random Access Memory) when it powers-off. The operating session will resume exactly where you left off the next time you power-on the system.

Important:

The 5VSB power source of your power supply must support

≥

1A.

When power returns after an AC power failure, you may choose to either power-on the system manually or let the system power-on automatically.

akak

OnOn

USBUSB

USB

PowerPower

Power

FailureFailure

Failure

RecoveryRecovery

Recovery

RTCRTC

RTC

STRSTR

STR

Hardware Installation

System Board Layout

Chapter 2 - Hardware Installation

Mouse

PS/2 power select (JP7)

Optical S/PDIF-out

Coaxial RCA S/PDIF-out

12V power

Clear CMOS (JP1)

USB 0-5 power select (J 5)P

LAN

USB 2-3

Line-in Front R/L Mic-in

Center/

Subwoofer

Side R/L

Rear R/L

20 19

DVI

NB fan

AMD

790GX

5V/12V

power

Marvell

88E8056

Realtek

ALC885

Front audio

CD-in

VIA

VT6307

1394-1

1394-0

USB 0-1

USB 4-5

Standby Power LED

CPU fan

SocketAM2+

DDR2-4

DDR2-2

DDR2-1

DDR2-3

ATX

power

IDE

DRAM

Power LED

PCIE 1

PCIE Gen 1 / Gen 2 select (JP13)

PCIE 3

PCIE 2

3rd fan

2nd fan

PCI 1

PCI 2

PCI 3

1st fan

SATA 4 SATA 5

SATA 2 SATA 3

SATA 0 SATA 1

Battery

AMD

SB750

Clear CMOS

(JP10)

SPI Flash BIOS

ITE

IT8716F

USB 6-11 power select (J 6)P

USB 8-91USB 6-71USB 10-11

System

fan

Download

BIOS (JP14)Flash

Reset

Power

COM

1 1

IrDA

CIR

Speaker on/off (JP8)

Front panel

FDD

Hardware Installation

System Memory

Warning:

When the DRAM Power LED lit red, it indicates that power is present on the DIMM sockets. Power-off the PC then unplug the power cord prior to installing any memory modules. Failure to do so will cause severe damage to the motherboard and components.

Warning:

Electrostatic discharge (ESD) can damage your system board, processor, disk drives, add-in boards, and other components. Perform the upgrade instruction procedures described at an ESD workstation only. If such a station is not available, you can provide some ESD protection by wearing an antistatic wrist strap and attaching it to a metal part of the system chassis. If a wrist strap is unavailable, establish and maintain contact with the system chassis throughout any procedures requiring ESD protection.

DDR2-1 DDR2-2

DDR2-3 DDR2-4

DRAM Power LED

Channel A

Channel B

The system board supports 240-pin DDR2 DIMM sockets. The four DDR2 DIMM sockets on the system board are divided into 2 channels:

Channel A - DDR2-1 and DDR2-2 Channel B - DDR2-3 and DDR2-4

Hardware Installation

BIOS Setting

Configure the system memory in the BIOS.

DIMMs are on the same channel. DIMMs in a channel can be identical or completely different. Not all slots need to be populated.

DIMMs of different memory configurations are on different channels. Odd number of slots can be populated.

DIMMs of the same memory configuration are on different channels.

In single channel, requires even number or rows (side of the DIMM) populated. This mode can be enabled with 1 SS, 2 SS or 2 DS.

In VSC mode, both channels must have identical row structure.

Single Channel

Virtual Single Channel

Dual Channel

Dynamic Mode Addressing

The system board supports the following memory interface.

Single Channel (SC)

Data will be accessed in chunks of 64 bits (8B) from the memory channels.

Virtual Single Channel (VSC)

If both channels are populated with different memory configurations, the MCH defaults to Vir tual Single Channel.

Dual Channel (DC)

Dual channel provides better system performance because it doubles the data transfer rate.

Dynamic Mode Addressing

This mode minimizes the overhead of opening/closing pages in memory banks allowing for row switching to be done less often.

Hardware Installation

The table below lists the various optimal operating modes that should be configured for the memory channel operation.

Config

No memory

Single channel A

Single channel B

Virtual single channel

Dual channel

DIMM 1

P(**)

p(**)

P(**)

P(*)(1,3)

DIMM 2

P(**)

P(*)(2,4)

DIMM 3

P(**)

P(*)(1,3)

DIMM 4

P(**)

P(*)(2,4)

Continued on the next page...

Hardware Installation

Config

Dynamic Mode Addressing

DIMM 1

P(*)(1,3)

DIMM 2

P(*)(2,4)

DIMM 3

P(*)(1,3)

DIMM 4

P(*)(2,4)

P - denotes populated E - denotes empty * - denotes DIMMs are identical ** - denotes DIMMs are not identical SS - denotes Single Sided DIMM DS - denotes Double Sided DIMM 1, 2, 3 or 4 - denotes the DDR DIMM slot

Hardware Installation

Installing the DIM Module

Note:

The system board used in the following illustrations may not resemble the actual board. These illustrations are for reference only.

1. Make sure the PC and all other peripheral devices connected to

it has been powered down.

2. Disconnect all power cords and cables.

3. Locate the DIMM socket on the system board.

4. Push the “ejector tabs” which are at the ends of the socket to

the side.

Ejector tab

5. Note how the module is keyed to the socket.

DIMM sockets

Ejector

tab

Key

Notch

Hardware Installation

7. Seat the module vertically, pressing it down firmly until it is completely seated in the socket.

6. Grasping the module by its edges, position the module above the socket with the “notch” in the module aligned with the “key” on the socket. The keying mechanism ensures the module can be plugged into the socket in only one way.

8. The ejector tabs at the ends of the socket will automatically snap into the locked position to hold the module in place.

Hardware Installation

4. Unlock the socket by pushing the lever sideways, away from the socket, then lifting it up to a 90o angle. Make sure the lever is lifted to at least this angle otherwise the CPU will not fit in properly.

Lever

CPU

Overview

The system board is equipped with Socket AM2+ for installing an AMD CPU designed for this socket.

Note:

The system board used in some illustrations may not resemble the actual board. These illustrations are for reference only.

Installing the CPU

1. Make sure the PC and all other peripheral devices connected to it has been powered down.

2. Disconnect all power cords and cables.

3. Locate Socket AM2+ on the system board.

Hardware Installation

Gold

mark

5. Position the CPU above the socket. The gold mark on the CPU must align with the corner of the CPU socket (refer to the enlarged image) shown below.

Important:

Handle the CPU by its edges and avoid touching the pins.

6. Inser t the CPU into the socket until it is seated in place. The CPU will fit in only one orientation and can easily be inserted without exerting any force.

Important:

Do not force the CPU into the socket. Forcing the CPU into the socket may bend the pins and damage the CPU.

7. Once the CPU is in place, push down the lever to lock the socket. The lever should click on the side tab to indicate that the CPU is completely secured in the socket.

Side tab

Hardware Installation

Installing the Fan and Heat Sink

The CPU must be kept cool by using a CPU fan with heat sink. Without sufficient air circulation across the CPU and heat sink, the CPU will overheat damaging both the CPU and system board.

The fan / heat sink assembly must provide airflow adequate to ensure appropriate internal temperature and cooling of the components in the system. Failure to use the appropriate cooling system may result in reduced performance or, in some instances, damage to the system board.

Note:

• Use only certified fan and heat sink.

• The fan and heat sink package usually contains the fan and heat

sink assembly, and an installation guide. If the installation procedure in the installation guide differs from the one in this section, please follow the installation guide in the package.

1. Before you install the fan / heat sink, you must apply a thermal paste onto the top of the CPU. The thermal paste is usually supplied when you purchase the CPU or fan heat sink assembly. Do not spread the paste all over the surface. When you later place the heat sink on top of the CPU, the compound will disperse evenly.

Do not apply the paste if the fan / heat sink already has a patch of thermal paste on its underside. Peel the strip that covers the paste before you place the fan / heat sink on top of the CPU.

Hardware Installation

3. Place the heat sink on top of the CPU. Now hook one side of the retention clip onto the retention module base by fitting the hole(s) on the retention clip into the retaining tab(s) of the retention module base. Hook the other side of the retention clip so that the hole(s) on the retention clip also fit into the retaining tab(s) of the retention module base.

Retention module base

2. The system board

comes with the retention module base already installed.

Retaining tab

Retention clip

Retaining tab

Hardware Installation

Note:

• You will not be able to secure the fan and heat sink assembly in place if it did not fit properly onto the retention module base.

• Make sure there is sufficient air circulation across the CPU fan and heat sink.

5. Connect the CPU fan’s cable connector to the CPU fan connector on the system board.

4. Move the retention lever to its opposite side then push it down to lock the fan and heat sink assembly to the retention module base.

Retention lever

Hardware Installation

Northbridge Heat Sink

The Northbridge must be kept cool by using a heat sink. The heat sink will dissipate heat generated by the Northbridge. Without the heat sink, the Northbridge will overheat damaging both the Northbridge and the system board.

The system board comes with the heat sink already installed on the board. The copper-made heat pipe technology provides excellent heat dissipation.

Hardware Installation

Jumper Settings

Clear CMOS Data

2-3 On:

Clear CMOS Data

1-2 On: Normal

(default)

JP10

312

JP1

2-3 On:

Clear CMOS Data

1-2 On: Normal

(default)

3 2

If you encounter the following,

a) CMOS data becomes corrupted. b) You forgot the supervisor or user password. c) The overclocked settings in the BIOS resulted to the system’s in-

stability or caused system boot up problems.

you can reconfigure the system with the default values stored in the ROM BIOS.

JP1 is accessible from the rear panel of the system. This provides convenience by allowing you to clear the CMOS without having to remove the chassis cover.

To load the default values stored in the ROM BIOS, please follow the steps below.

1. Power-off the system then unplug the power cord.

2. Set JP1 or JP10 pins 2 and 3 to On. Wait for a few seconds and set JP1 or JP10 back to its default setting, pins 1 and 2 On.

3. Now plug the power cord then power-on the system.

Hardware Installation

PS/2 Power Select

Selecting 5VSB will allow you to use the PS/2 keyboard or PS/2 mouse to wake up the system.

JP7

USB Power Select

USB 0-5 (JP5)

USB 6-11 (JP6)

2-3 On: 5VSB

1-2 On: 5V

(default)

2-3 On:

5VSB

1-2 On: 5V

(default)

Selecting 5VSB will allow you to use the USB keyboard or USB mouse to wake up the system..

Important:

The 5VSB power source of your power supply must support ≥720mA.

Important:

The 5VSB power source of your power supply must support ≥1.5A (2 devices) or ≥2A (3 or more devices).

312

1-2 On: 5V

(default)

312

2-3 On: 5VSB

312

Hardware Installation

PCIE Gen 1 / Gen 2 Select

2-3 On: Gen 1

1-2 On: Gen 2

(default)

JP13

Set this jumper according to the type of PCI Express card that you are using.

The system board is equipped with a buzzer which serves as the PC’s speaker. By default the buzzer is “on” allowing you to hear the system’s beep messages and warnings. If you intend to use an external speaker, turn this function off by setting JP8 pins 1 and 2 to On.

Speaker On/Off Select

JP8

2-3 On:

Speaker On

(default)

1-2 On:

Speaker Off

312

Buzzer

+ 124 hidden pages

DFI LanParty DK 790GX-M2RS User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual