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Chapter 2
- Hardware Installation
SD170
20
Power
Use a power supply that complies with the ATX12V Power Supply Design Guide Version 1.1.
An ATX12V power supply unit has a standard 24-pin ATX main power connector that must be
inserted into the 24-pin connector. The 4-pin +12V power connector enables the delivery of
more +12VDC current to the processor’s Voltage Regulator Module (VRM).
The power connectors from the power supply unit are designed to fit the 24-pin and 4-pin
connectors in only one orientation. Make sure to find the proper orientation before plugging
the connectors.
The system board requires a minimum of 300 Watt power supply to operate. Your system
configuration (CPU power, amount of memory, add-in cards, peripherals, etc.) may exceed the
minimum power requirement. To ensure that adequate power is provided, we strongly recom-
mend that you use a minimum of 400 Watt (or greater) power supply.
ATX Power
+12V Power
12
1
24
13
4
3
2
1
Pin Assignment
Pin Assignment
1
+3.3V
13
+3.3V
2
+3.3V
14
-12V
3
GND
15
GND
4
+5V
16
PS_ON#
5
GND
17
GND
6
+5V
18
GND
7
GND
19
GND
8
PWR_OK
20
NC
9
+5VSB
21
+5V
10
+12V
22
+5V
11
+12V
23
+5V
12
+3.3V
24
GND
Pin Assignment
1
GND
2
GND
3
+12V
4
+12V
▼
4-pin Power Pin Assignment
▼
24-pin Power Pin Assignment
Important:
Insufficient power supplied to the system may result in instability or malfunction
of the add-in boards and peripherals. Calculating the system’s approximate power
usage is important to ensure that the power supply meets the system’s consump-
tion requirements.
►
Internal I/O Connectors
