MSI MS-6791 Manual
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MSI MS-6791 Manual

MSI MS-6791 Manual

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Getting Started
Getting Started
Thank you for purchasing the MS-6791 v1.x M-ATX
mainboards. The MS-6791 is a superior computer motherboard
based on SiS648FX/661FX and SiS963/963L chipsets for
optimal system efficiency. Designed to fit the advanced Intel
®
Pentium
4 Northwood/Prescott processors in the 478 pin
®
package, the MS-6791 delivers a high performance and
professional desktop platform solution.
1-1

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Summary of Contents for MSI MS-6791

  • Page 1 Getting Started Getting Started Thank you for purchasing the MS-6791 v1.x M-ATX mainboards. The MS-6791 is a superior computer motherboard based on SiS648FX/661FX and SiS963/963L chipsets for optimal system efficiency. Designed to fit the advanced Intel ® Pentium 4 Northwood/Prescott processors in the 478 pin ®...

  • Page 2: Mainboard Specifications

    MS-6791 M-ATX Mainboard Mainboard Specifications Supports Socket 478 for P4 processor with 400/533/800 MHz (100/133/200 MHz QDIR) Core frequency up to 3.2GHz or above Chipset ® 648FX/661FX chipsets - Supports Intel Pentium 4 processors with data transfer rate up to 800MHz...
  • Page 3 Getting Started - 2 serial ports (COM A + COM B) - 1 parallel port supports SPP/EPP/ECP mode - 1 audio port (Line-in, Line-out, Mic-in) - 6 high speed USB 2.0 ports (Rear * 4/ Front * 2) - 1 IrDA connector for SIR - 1 RJ-45 LAN jack (Optional) Audio 6-channel audio codec RealTek ALC650/655 (Optional)

  • Page 4: Mainboard Layout

    JLAN1 PWRSW1 RealTek PCI Slot1 8100C CD_IN2 PCI Slot2 JGLED1 JFP1 963/963L CD_IN1 Realtek JUSB3 JUSB2 8801B JUSB1 PCI Slot3 JSMI1 Codec JUSB4 J1394_1 J1394_2 JWOL1 JAUD1 JAUDIO1 JBAT1 JSP1 JMR1 JCI1 MS-6791 v1.X M-ATX Mainboard JUSB3 JUSB4 JUSB1 JUSB2...

  • Page 5: Chapter 2. Hardware

    Hardware Setup Chapter 2. Hardware Setup Hardware Setup This chapter tells you how to install the CPU, memory modules, and expansion cards, as well as how to setup the jumpers on the mainboard. Also, it provides the instructions on connecting the peripheral devices, such as the mouse, keyboard, etc.

  • Page 6: Quick Components Guide

    MS-6791 M-ATX Mainboard Quick Components Guide CPU, p.2-3 CPUFAN, p.2-17 JCPU_TEMP, p.2-28 JPW1, p.2-9 DDR DIMMs, p.2-7 PWRFAN1, p.2-17 CONN1, p.2-9 Back Panel I/O, p.2-10 FDD1, p.2-16 NBFAN, p.2-17 BIOS_WP1, p.2-30 IDE1, IDE2, IR1, p.2-28 p.2-19 PWRSW1, p.2-28 CHSFAN, p.2-17 JLAN1, p.2-30...

  • Page 7: Central Processing Unit (Cpu)

    DDR 266 DDR 333 DDR 400 400 MHz 533 MHz 800 MHz MSI Reminds You... Overheating Overheating will seriously damage the CPU and system, always make sure the cooling fan can work properly to protect the CPU from overheating. Overclocking This motherboard is designed to support overclocking.

  • Page 8: Cpu Installation Procedures For Socket 478

    MS-6791 M-ATX Mainboard CPU Installation Procedures for Socket 478 Please turn off the power and unplug the power cord before Open Lever installing the CPU. Pull the lever sideways away Sliding 90 degree Plate from the socket. Make sure to raise the lever up to a 90- degree angle.

  • Page 9: Installing The Cpu Fan

    Hardware Setup Installing the CPU Fan As processor technology pushes to faster speeds and higher performance, thermal management becomes increasingly important. To dissipate heat, you need to attach the CPU cooling fan and heatsink on top of the CPU. Follow the instructions below to install the Heatsink/Fan: Locate the CPU and its retention Position the heatsink onto the reten- mechanism on the motherboard.
  • Page 10 MS-6791 M-ATX Mainboard Connect the fan power cable from the mounted fan to the 3-pin fan power connector on the board. fan power cable NOTES...

  • Page 11: Introduction To Ddr Sdram

    Hardware Setup Memory The mainboard provides 2 slots for 184-pin DDR SDRAM DIMM (Double In-Line Memory Module) modules and supports the memory size up to 2GB. You can install PC3200/DDR400, PC2700/DDR333, PC2100/DDR266 modules on the DDR DIMM slots (DIMM 1~2). DDR Slots Introduction to DDR SDRAM DDR (Double Data Rate) SDRAM is similar to conventional SDRAM,...

  • Page 12: Ddr Dimm Module Combination

    MS-6791 M-ATX Mainboard DDR DIMM Module Combination Install at least one DIMM module on the slots. Memory modules can be installed on the slots in any order. You can install either single- or double- sided modules to meet your own needs.

  • Page 13: Power Supply

    This 12V power connector is used to provide power to the CPU. JPW1 CONN1 CONN1 Pin Definition SIGNAL SIGNAL JPW1 Pin Definition 3.3V 3.3V SIGNAL 3.3V -12V PS_ON PW_OK 5V_SB MSI Reminds You... Power supply of 300 (and up) watt is highly recommended for system stability.

  • Page 14: Back Panel

    MS-6791 M-ATX Mainboard Back Panel The back panel provides the following connectors: For SiS 661FX Parallel (Optional) Mouse L-in L-out Keyboard For SiS 648FX Parallel (Optional) Mouse L-in L-out Keyboard 2-10...

  • Page 15: Keyboard Connector

    Hardware Setup Keyboard Connector ® The mainboard provides a standard PS/2 keyboard mini DIN connector ® ® for attaching a PS/2 keyboard. You can plug a PS/2 keyboard directly into this connector. Pin Definition SIGNAL DESCRIPTION Keyboard DATA Keyboard DATA No connection Ground Keyboard Clock...

  • Page 16: Usb 2.0 Connectors

    MS-6791 M-ATX Mainboard USB 2.0 Connectors The mainboard provides an OHCI (Open Host Controller Interface) Uni- versal Serial Bus root for attaching USB devices such as keyboard, mouse or other USB-compatible devices. You can plug the USB device directly into the connector.

  • Page 17: Serial Port Connectors: Com A & Com B

    Hardware Setup Serial Port Connectors: COM A & COM B The mainboard offers two 9-pin male DIN connectors as serial port COM A & COM B. The ports are 16550A high speed communication ports that send/receive 16 bytes FIFOs. You can attach a serial mouse or other serial devices directly to the connectors.

  • Page 18: Parallel Port Connector: Lpt1

    MS-6791 M-ATX Mainboard Parallel Port Connector: LPT1 The mainboard provides a 25-pin female centronic connector as LPT. A parallel port is a standard printer port that supports Enhanced Parallel Port (EPP) and Extended Capabilities Parallel Port (ECP) mode. Pin Definition...

  • Page 19: Audio Port Connectors

    Line In 1/8” Stereo Audio Connectors Line Out MSI Reminds You... The mainboard offers 6-channel audio operation and can turn rear audio connectors from 2-channel to 4-/6-channel audio. For more information on 6-channel audio operation, please refer to Appendix A: Using 4- or 6-Channel Audio Function.

  • Page 20: Floppy Disk Drive Connector: Fdd1

    MS-6791 M-ATX Mainboard Connectors The mainboard provides connectors to connect to FDD, IDE HDD, case, LAN, USB Ports, IR module and CPU/System/Power Supply FAN. Floppy Disk Drive Connector: FDD1 The mainboard provides a standard floppy disk drive connector that supports 360K, 720K, 1.2M, 1.44M and 2.88M floppy disk types.
  • Page 21 CPU fan control. SENSOR +12V CPUFAN1 SENSOR +12V PWRFAN1 SENSOR +12V NBFAN1 SENSOR +12V CHSFAN1 MSI Reminds You... Always consult the vendors for proper CPU cooling fan. 2-17...
  • Page 22 MS-6791 M-ATX Mainboard Front Panel Connector: JFP1 or JLEG1 The mainboard provides one front panel connector, JFP1 or JLEG1, for electrical connection to the front panel switches and LEDs. JFP1 is compliant ® with Intel Front Panel I/O Connectivity Design Guide.

  • Page 23: Hard Disk Connectors: Ide1 & Ide2

    IDE2 (Secondary IDE Connector) IDE2 can also connect a Master and a Slave drive. MSI Reminds You... If you install two hard disks on cable, you must configure the second drive to Slave mode by setting its jumper. Refer to the hard disk documentation supplied by hard disk vendors for jumper setting instructions.
  • Page 24 MS-6791 M-ATX Mainboard Front Panel Audio Connector: JAUD1 or JAUDIO1 The mainboard provides one front panel audio connector, JAUD1 or JAUDIO1, for you to connect to the front panel audio. JAUD1 is compliant ® with Intel Front Panel I/O Connectivity Design Guide.
  • Page 25 Hardware Setup JAUD1 Pin Definition SIGNAL DESCRIPTION AUD_MIC Front panel microphone input signal AUD_GND Ground used by analog audio circuits AUD_MIC_BIAS Microphone power AUD_VCC Filtered +5V used by analog audio circuits AUD_FPOUT_R Right channel audio signal to front panel AUD_RET_R Right channel audio signal return from front panel HP_ON Reserved for future use to control headphone amplifier...
  • Page 26 MS-6791 M-ATX Mainboard CD-In Connector: CD_IN1 This connector is provided for CD-ROM audio. Modem-In Connector: MDM_IN1 The connector is for modem with internal audio connector. Aux Line-In Connector: CD_IN2 The connector is for DVD add-on card with Line-in connector. Mono_Out...

  • Page 27: Spdif-Out Connector: Jsp1

    Hardware Setup SPDIF-Out Connector: JSP1 This connector is used to connect SPDIF (Sony & Philips Digital Inter- connect Format) interface for digital audio transmission. SPDIF JSP1 Connected to JSP1 SPDIF Bracket (Optional) 2-23...
  • Page 28 MS-6791 M-ATX Mainboard Front USB Connectors: JUSB1/2 or JUSB3/4 The mainboard provides two USB 2.0 pinheaders (optional USB 2.0 Bracket available). Users can choose either JUSB1/JUSB2 or JUSB3/JUSB4 depending on the model they purchased. The difference between these front ®...
  • Page 29 Hardware Setup IEEE 1394 Connectors: J1394_1 & J1394_2 The mainboard provides two 1394 pin headers that allow you to con- nect optional IEEE 1394 ports. J1394_2 J1394_1 J1394_1 Pin Definition J1394_2 Pin Definition SIGNAL SIGNAL SIGNAL SIGNAL TPA+ TPA- Ground Ground TPB- TPB+...

  • Page 30: Wake On Lan Connector: Jwol

    MS-6791 M-ATX Mainboard Wake On LAN Connector: JWOL This connector allows you to connect to a LAN card with Wake On LAN function. You can wake up the computer via remote control through a local area network. Wake On Ring Connector: JMR1 This connector allows you to connect to a modem card with Wake On Ring function.

  • Page 31: Power Saving Led Connector: Jgled1

    Hardware Setup Power Saving Switch Connector: JSMI1 Attach a power saving switch to this connector. Pressing the switch once will have the system enter the sleep state. Press any key to wake up the system. Power Saving LED Connector: JGLED1 This allows you to connect to a power saving LED.

  • Page 32: Irda Infrared Module Header: Ir1

    MS-6791 M-ATX Mainboard IrDA Infrared Module Header: IR1 The connector allows you to connect to IrDA Infrared module. You must configure the setting through the BIOS setup to use the IR function. IR1 is ® compliant with Intel Front Panel I/O Connectivity Design Guide.

  • Page 33: Clear Cmos Jumper: Jbat1

    Clear Data Keep Data JBAT1 MSI Reminds You... You can clear CMOS by shorting 2-3 pin while the system is off. Then return to 1-2 pin position. Avoid clearing the CMOS while the system is on; it will damage the mainboard.

  • Page 34: Lan Enable/Disable Jumper: Jlan1

    MS-6791 M-ATX Mainboard LAN Enable/Disable Jumper: JLAN1 The jumper is used to enable or disable the onboard LAN function. The jumper is available only when LAN is integrated on the board. BIOS Flash Jumper: BIOS_WP1 This jumper is used to lock or unlock the boot block area on BIOS.

  • Page 35: Agp (Accelerated Graphics Port) Slot

    Hardware Setup Slots The motherboard provides one AGP slot and three 32-bit PCI bus slots. AGP Slot PCI Slots AGP (Accelerated Graphics Port) Slot The AGP slot allows you to insert the AGP graphics card. AGP is an interface specification designed for the throughput demands of 3D graphics. It introduces a 66MHz, 32-bit channel for the graphics controller to directly access main memory.

  • Page 36: Pci Interrupt Request Routing

    MS-6791 M-ATX Mainboard PCI Interrupt Request Routing The IRQ, acronym of interrupt request line and pronounced I-R-Q, are hardware lines over which devices can send interrupt signals to the microprocessor. The PCI IRQ pins are typically connected to the PCI bus INT...

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