Chapter 5: Advanced Motherboard Setup
5-15
5-8 Connector Definitions
Power Connectors
(Required)
12V 8-pin Power Connec-
tor Pin Definitions
Pins Definition
1 through 3
+12V
4 through 8
Ground
Main PWR (JPW1) & GPU PWR
Connectors (JPW2, JPW3)
The 20-pin proprietary main power
connector (JPW1) is used to provide
power to the motherboard. The 8-pin
GPU PWR connector JPW2 is also
required for the graphics processor.
JPW3 is used if additional power to
the GPU is needed for performance
boost. These power connectors
meet the SSI EPS 12V specification.
See the tables on the right for pin
definitions.
20-pin Power Connector
Pin Definitions (JPW1)
Pin# Definition Pin # Definition
11
PS_ON_N
1
GND1
12
5V STBY
2
GND2
13
GND6
3
GND3
14
GND7
4
GND4
15
GND8
5
GND5
16
NC2
6
NC1
17
12V_5
7
12V_1
18
12V_6
8
12V_2
19
12V_7
9
12V_3
20
12V_8
10
12V_4
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