Megaplex Quad Pentium II Xeon PCI ISA System Guide
26
Step 6 Connect Power Supply
The Megaplex motherboard is designed to fit in a custom-built chassis. The
Megaplex requires four ATX-style power connectors. Make sure that the power
switch is Off before assembly. Before attaching all components, make sure that
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.
ATX Power Connectors
Attach the power supply cables to the ATXPS power connectors on the
motherboard, and the memory card.
Pin
Signal Description
Pin
Signal Description
1
3.3V
11
3.3V
2
3.3V
12
-12V
3
GND
13
GND
4
+5V
14
PSON (not used by the Megaplex.
The power supply must turn on
without these signals).
5
GND
15
GND
6
+5V
16
GND
7
GND
17
GND
8
NC
18
-5V
9
5VSB (not used by Megaplex)
19
+5V
10
+12V
20
+5V
Power Requirements
At a minimum, one power supply generating 95 amps at +5V and 62 amps
at +3.3V must be used. A 1000 watt power supply generating 100 amps at +5V,
65 amps at 3.3V, and 20 amps at +12V is recommended.
Cont’d
Содержание MegaPlex II
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