AOpen DX6G Plus Manuale utente

C h a p t e r

System Board

System Board 1-1

1.1 Features

The DX6G Plus is a dual-processor system board built on an

extended ATX baseboard utilizing two Pentium®II processors running

at 400/100 and 450/100 MHz or two Pentium®III processors running

at 500/100 and 550/100 MHz. It is integrated with the Intel 440GX

system controller, which consists of the PCI/AGP controller and the

PCI/ISA IDE accelerator (PIIX4E).

The Pentium®II and Pentium®III processor implements a Dynamic

Execution micro-architecture - a unique combination of multiple

branch prediction, data flow analysis, and speculative execution. This

means that it can deliver higher performance than the previous

Pentium®processor while maintaining binary compatibility with all

previous Intel Architecture processors.

The PCI/AGP controller host bus interface supports both Pentium®II

and Pentium®III with 100 MHz bus frequency. It also provides a 72-

bit DIMM that supports synchronous DRAM (SDRAM) DIMMs. The

PCI/AGP controller introduces a new technology, which is the

Accelerated Graphics Port (AGP) interface. Supporting up to

533MB/sec MHz data transfer rate, the AGP interface boosts graphics

performance.

The PIIX4E is a multifunctional PCI device controller implementing

system functions including PCI IDE, universal serial bus (USB)

host/hub, and enhanced power management. It also supports Ultra

DMA/33 synchronous DMA-compatible devices.

1-2User’s Guide

The four DIMM sockets on board allow memory upgrade to a

maximum of 2048 MB and supports 72-bit DIMM using synchronous

DRAM (SDRAM) DIMMs.

Two 16-bit Ultra-2 SCSI (Small Computer System Interface) and an

8-bit fast narrow SCSI comes with the system board to connect SCSI

devices.

The system board also supports the USB (Universal Serial Bus)

connector, and other standard features such as two UART NS16C550

serial ports, one enhanced parallel port with Enhanced Parallel Port

(EPP)/Extended Capabilities Port (ECP) feature, a diskette drive

interface, and two embedded hard disk interfaces. The board also

includes a built-in 10/100 Mb/s Intel 82558 LAN chip that supports

Wake-On-LAN (WOL).

The system supports the power-management function that conforms

to the power-saving standards of the U.S. Environmental Protection

Agency (EPA) Energy Star program. It also offers the Plug-and-Play

feature. This feature saves the user from configuration troubles, thus

making the system more user-friendly. The system board support Intel

LDCM© (LAN Desktop Client Manager) which will detect problems in

CPU thermal condition, CPU working voltage, CPU fan and the

chassis fan malfunctions. It also provides remote monitoring features.

The system is fully compatible with MS-DOS V6.X, Novell Netware,

Novel SFT III, SCO UNIX, Windows NT and Windows 95/98 operating

systems

System Board 1-3

1.2 Major Components

The system board has the following major components:

•Supports dual Pentium®II processors running at 400 or 450

MHz, Pentium®III processors running at 500 or 550 MHz, and

future generations Pentium CPUs.

•Four DIMM sockets that accept 16-, 32-, 64- 128-, 256 and

512MB DIMMs with a maximum of 2048 MB system memory

•One ISA, six PCI, and one AGP bus slots (one PCI and ISA

shared slot)

•512-KB Flash ROM for system BIOS

•System clock/calendar with battery backup

•One 50-pin fast SCSI and two 68-pin Ultra2 SCSI

•I/O APIC device for SMP interrupt support

•Integrates an enhanced PCI local bus IDE controller

•Intel 440GX chipset supports AGP (Accelerated Graphics Port)

and Ultra DMA/33 functions

•10/100 Mb/s Intel 82558 LAN chip that supports Wake-On-LAN

(WOL)

•IDE hard disk and diskette drive interfaces

•Auxiliary power connector for 337W SPS (Optional) and 350W

ATX power supply

•Super I/O, SCSI, memory, and LAN Desk Client Management

(LDCM) controller chipsets

•External ports:

•USB connector •PS/2-compatible keyboard port

•RJ-45 jack •PS/2-compatible mouse port

•Parallel port •Serial port 1 and 2

1-4User’s Guide

1.3 Layout

1 Mouse port

2 Keyboard port

3 Serial port 2

4 Parallel port

5 Serial port 1

6 USB connector

7 RJ-45

8 LAN controller

9 AGP slot

10 PCI slots

11 ISA slot

12 Intel 82371EB PIIX4E (PCI-

ISA bridge)

13 DEC 21152 (PCI-PCI bridge)

14 Buzzer

15 SCSI controller

16 Battery

17 System BIOS

18 RDM connectors

19 Channel 1 Ultra-wide/Ultra-2 SCSI

connector (68 pin)

20 Channel 2 Ultra-wide/Ultra-2 SCSI

connector (68 pin)

21 Channel 2 fast/narrow SCSI

connector (50 pin)

22 FDD connector

23 EIDE connector 2 (secondary)

24 EIDE connector 1 (primary)

25 DIMM sockets

26 Intel 443GX system controller

27 Power connector 1

28 Power connector 2

29 Power connector 3

30 Slot 1 CPU sockets

3456

System Board 1-5

1.4 Jumpers and Connectors

1.4.1 Jumper and Connector Locations

Jumpers are prefixed P”. Connectors are

prefixed N”. The blackened pin of a

jumper or connector represents pin 1.

1-6User’s Guide

1.4.2 Jumper Settings

The table below lists the system board jumpers with their

corresponding settings and functions.

Jumper Setting Function

BIOS Logo

JP3 1-2*

2-3 Logo

OEM

Password Security

JP4 1-2

2-3* Check password

Bypass password

Boot Block Mode

JP5 1-2

2-3* Disabled

Enabled

Sound Output

JP6 1-2*

2-3 Buzzer

Speakers

SCSI Channel 1Terminator

JP11 1-2*

2-3 Enabled

Disabled

AlertPack Select

JP7 1-2 / 4-5

2-3 / 5-6* AlertPack and LM80

LM80 only

*Default

System Board 1-7

1.4.3 Connector Functions

The table below lists the different connectors on the system board and

their respective functions.

Connector Function

CN1 Cabinet Fan Connector

CN4 337W Power Supply Connector (3.3V and 5V)

CN3 Mouse and Keyboard Ports

CN6 ATX Power Connector

CN7 Power Supply Connector

CN9 Modem Card Ring-in Connector

CN10 Parallel (above), Serial 1(left), and Serial 2 (right)

ports

CN11 USB Connectors

CN12 CPU1 Fan Connector

CN13 CPU2 Fan Connector

CN14 RJ-45 (LAN) Port

CN15 Fail Report LED Connector

CN16 Cabinet Fan Connector

CN17 Cabinet Fan Connector

CN18 Cabinet Fan Connector

CN20 2 Color Power LED Connector

CN22 Redundant Power Status Connector

CN23 CPU1 Temperature Connector

CN24 CPU2 Temperature Connector

CN26 PCI Sound Card Interrupt and DMA Request

Connector

CN27 Primary IDE Connector

CN28 FDD Connector

CN29 SCSI Channel 2 Wide Connector

CN30 Secondary IDE Connector

CN31 CD-in connector

CN32 SCSI Channel 1 Wide Connector

1-8User’s Guide

Connector Function

CN33 SCSI Channel 2 Narrow Connector

CN34 RDM LED Connector

CN35 External Speaker Connector

CN36/CN37 External LED Connector

CN38 Power Switch Connector

CN39/CN47 N.A

CN40 Wake-on-LAN (WOL) Connector

CN42 3-pin Standby Power Connector

CN43 Hard Disk LED Connector

CN44 Reset Button Connector

CN45 Feature Connector (Intel SMM Card)

CN46 Door Switch Connector

CNX19 Backplane board connector (3-pin)

System Board 1-9

1.5 ESD Precautions

Always observe the following electrostatic discharge (ESD)

precautions before installing a system component:

1. Do not remove a component from its antistatic packaging until

you are ready to install it.

2. Wear a wrist grounding strap before handling electronic

components. Wrist grounding straps are available at most

electronic component stores.

Do not attempt the procedures described in

the following sections unless you are a

qualified technician.

1-10 User’s Guide

1.6 Installing the Pentium II and Pentium III

processors

The following section will briefly explain and illustrate how to install the

Pentium II and Pentium III processors.

You have to attached the fan sink before

installing the processor into the system

board.

1.6.1 Attaching the Processor Fan Sink

There are currently two kinds of fan sink. Both of them can be easily

attach to the processor module. The new fan sink includes a new

metal retention bracket to hold the processor module more securely.

The processor module comes with holes on one side to hold the clips

of the fan sink. The upper set of holes (near the latches) on the

processor are wider and should match the wider ends of the clips on

the fan sink. The lower set of holes are smaller and should match the

narrow ends of the fan sink clips.

Wide Holes

Narrow Holes

Wide Clip Ends Metal

Retention

bracket

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