Abit BD7III User Manual

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Hardware Setup

2-3

 

 

2-3.Install System Memory

This motherboard provides two 184-pinDDR DIMM slots for maximum memory expansion up to 2GB.

Table 2-1.Valid Memory Configurations

Bank

 

Memory Module

Total Memory

 

 

 

 

Bank 0, 1 (DIMM1)

 

128, 256, 512MB, 1GB

128MB ~ 1GB

 

 

 

 

Bank 2, 3 (DIMM2)

 

128, 256, 512MB, 1GB

128MB ~ 1GB

 

 

 

 

 

Total System Memory

128MB ~ 2GB

 

 

 

 

NOTE: No hardware or BIOS setup required after adding or removing memory modules.

Power off the computer and unplug the AC power cord before installing or removing memory modules.

1.Locate the DIMM slot on the board.

2.Hold two edges of the DIMM module carefully, keep away of touching its connectors.

3.Align the notch key on the module with the rib on the slot.

4.Firmly press the module into the slots until the ejector tabs at both sides of the slot automatically snaps into the mounting notch. Do not force the DIMM module in with extra force as the DIMM module only fit in one direction.

5.To remove the DIMM modules, push the two ejector tabs on the slot outward simultaneously, and then pull out the DIMM module.

ATTENTION: Static electricity can damage the electronic components of the computer or optional boards. Before starting these procedures, ensure that you are discharged of static electricity by touching a grounded metal object briefly.

User’s Manual

2-4

Chapter 2

 

 

2-4.Connectors, Headers and Switches

Here we will show you all of the connectors, headers and switches, and how to connect them. Please read the entire section for necessary information before attempting to finish all the hardware installation inside the computer chassis. A complete enlarged layout diagram is shown in Chapter 1 for all the position of connectors and headers on the board that you may refer to.

WARNING: Always power off the computer and unplug the AC power cord before adding or removing any peripheral or component. Failing to so may cause severe damage to your motherboard and/or peripherals. Plug in the AC power cord only after you have carefully checked everything.

(1). ATX Power Input Connectors

The Pentium 4 requires a power supplier different from the regular one. It’s a newly designed ATX12V power with 300W, 20A +5VDC capacity at least for heavily loaded system, and 720mA +5VSB at least for supporting Wake-On-LANfeature.

BD7III

Hardware Setup

2-5

 

 

(2). FAN Connectors

These 3-pinconnectors each provide power to the cooling fans installed in your system.

The CPU must be kept cool by using a powerful fan with heatsink. The system is capable of monitoring the speed of the CPU fan.

CPUFAN1: CPU Fan

SYSFAN1: System Fan

AUXFAN1: Auxiliary Fan

WARNING: These fan connectors are not jumpers. DO NOT place jumper caps on these connectors.

User’s Manual

2-6

Chapter 2

 

 

(3). CMOS Memory Clearing Header

This header uses a jumper cap to clear the CMOS memory.

Pin 1-2shorted (default): Normal operation.

Pin 2-3shorted: Clear CMOS memory.

WARNING: Turn the power off first (including the +5V standby power) before clearing the CMOS memory. Failing to do so may cause your system to work abnormally or malfunction.

BD7III

Hardware Setup

2-7

 

 

(4). Front Panel Audio Connection Header

This header provides the connection to audio connector at front panel.

To use the audio connector at front panel, remove all the jumpers on this header, and then connect to front panel by the extension cable provided with the chassis.

To use the audio connector at rear panel, disconnect the extension cable, attach the jumpers back at pin 5-6,and pin9-10(default setting).

 

Pin

Pin Assignment

Pin

Pin Assignment

 

1

Audio Mic.

2

Ground

 

3

Audio Mic. Bias

4

VCC

 

5

Speaker Out Right

6

Speaker Out Right

 

Channel

Channel Return

 

 

 

 

7

X

8

NC

 

 

 

 

 

 

9

Speaker Out Left

10

Speaker Out Left

 

Channel

Channel Return

 

 

 

 

 

 

 

 

 

11

Ground

12

S/PDIF In

 

13

VCC

14

S/PDIF Out

 

 

 

 

 

User’s Manual

2-8

Chapter 2

 

 

(5). Front Panel Switches & Indicators Headers

This header is used for connecting switches and LED indicators on the chassis front panel.

Watch the power LED pin position and orientation. The mark “+” align to the pin in the figure below stands for positive polarity for the LED connection. Please pay attention to connect these headers. A wrong orientation will only cause the LED not lighting, but a wrong connection of the switches could cause system malfunction.

HLED (Pin 1, 3):

Connects to the HDD LED cable of chassis front panel.

RST (Pin 5, 7):

Connects to the Reset Switch cable of chassis front panel.

SPK (Pin 15, 17, 19, 21):

Connects to the System Speaker cable of chassis.

SLED (Pin 2, 4):

Connects to the Suspend LED cable (if there is one) of chassis front panel.

PWR-ON(Pin 6, 8):

Connects to the Power Switch cable of chassis front panel.

PLED (Pin 16, 18, 20):

Connects to the Power LED cable of chassis front panel.

BD7III

Hardware Setup

2-9

 

 

(6). Additional USB Port Headers

These headers each provide 2 additional USB 2.0 ports connection through an USB cable designed for USB 2.0 specifications.

 

Pin

Pin Assignment

Pin

Pin Assignment

 

 

 

 

 

 

1

VCC

2

VCC

 

 

 

 

 

 

3

Data0 -

4

Data1 -

 

 

 

 

 

 

5

Data0 +

6

Data1 +

 

 

 

 

 

 

7

Ground

8

Ground

 

 

 

 

 

 

9

NC

10

NC

 

 

 

 

 

User’s Manual

2-10

Chapter 2

 

 

(7). System Management Bus Headers

This header is reserved for system management bus (SM bus). The SM bus is a specific implementation of an I2C bus. I2C is amulti-masterbus, which means that multiple chips can be connected to the same bus and each one can act as a master by initiating a data transfer. If more than one master simultaneously tries to control the bus, an arbitration procedure decides which master gets priority.

(8). Internal Audio Connectors

These connectors connect to the audio output of internal CD-ROMdrive oradd-oncard.

BD7III

Hardware Setup

2-11

 

 

(9). Accelerated Graphics Port Slot

This slot supports an optional AGP graphics card up to AGP 4X mode. Please refer to our Web site for more information on graphics cards.

ATTENTION: This motherboard does not support 3.3V AGP cards. Use only 1.5V AGP cards.

(10). Status Indicators

LED1 (VCC): This LED lights up when the system power is on.

LED2 (5VSB): This LED lights up when the power supply is connected with power source.

User’s Manual

2-12

Chapter 2

 

 

(11). Floppy Disk Drive Connector

This connector supports two standard floppy disk drives via a 34-pin34-conductorribbon cable. Connecting the Floppy Disk Drive Cable:

1.Install one end of the ribbon cable into the FDC1 connector. The colored edge of the ribbon cable should be aligned with pin-1of FDC1 connector.

2.Install the other end(s) of ribbon cable into the disk drive connector(s). The colored edge of the ribbon cable should be also aligned with pin-1of disk drive connector. The endmost connector should be attached to the drive designated as Drive A.

BD7III