MegaDual PCI Motherboard User’s Guide
14
Step 8 Attach Cables,
Continued
Connect Power Supply
The power supply should match the physical configuration of the chassis. Make
sure the power switch is Off before assembly.
Before attaching all components, make sure the proper voltage has been selected. Power
supplies often can run on a wide range of voltages and must be set (usually via a switch)
to the proper range. Use at least a 300-watt ATX power supply, which should have built-
in filters to suppress radiated emissions. Power supply voltage depends upon system
load. For example, +12V rating should be matched to the amount of the external load (SCSI,
IDE, or hard disks.)
Attach the cables from the power supply to the power connector(s) on the motherboard.
ATX-compatible power supplies can have either one or two 20-pin connectors. You can
use either one or both power connectors.
You can connect the ATX power supply to either J4 or J5 on the motherboard, or you can
use both connectors if there are two power cables from the ATX power supply.
The power connector pinout is:
Pin
Description
Pin
Description
11
+3.3V
1
+3.3V
12
-12V
2
+3.3V
13
Ground
3
Ground
14
PSON
4
+5V (VCC)
15
Ground
5
Ground
16
Ground
6
+5V (VCC)
17
Ground
7
Ground
18
-5V
8
POWER GOOD
19
+5V
9
5VSB
20
+5V
10
+12V
Cont’d
Summary of Contents for MegaDual
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Page 9: ...Chapter 1 Hardware Installation 3 MegaDual PCI Motherboard Layout ...
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