AOpen DX6G Plus User manual

C h a p t e r
1
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
1
2
3456
7
8
10
11
13
12
14
15
16
18
19
20
21
22
26
30
27
28
29
24
23
25
17
9

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.

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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