Chapter 4 Motherboard Connections; Power Connections - Supermicro A+ AS -2015A-TR User Manual

Motherboard Connections
This section describes the connections on the motherboard and provides pinout definitions.
Note that depending on how the system is configured, not all connections are required.
The LEDs on the motherboard are also described here. The motherboard layout indicating
component locations may be found in
Please review the Safety Precautions in

4.1 Power Connections

12V 8-pin Auxiliary Power Connector (JPW2)
JPW2 is an 8-pin ATX power input to provide auxiliary power to the processor. Refer to the
table below for pin definitions.
Main Power Supply Connector (JPW1)
The primary power supply connector (JPW1) is an ATX power connector that the power
supply plugs into directly.
Chapter 4
Chapter 1.
Appendix A before installing or removing components.
12 V 8-Power Connector
Pin Definitions
Pin# Definition Pin# Definition
1 Ground 5 +12 V
2 Ground 6 +12 V
3 Ground 7 +12 V
4 Ground 8 +12 V
ATX Power 24-pin Connector
Pin Definitions
Pin# Definition Pin# Definition
1 +3.3 V 13 +3.3 V
2 +3.3 V 14 -12 V
3 Ground 15 Ground
4 +5 V 16 PS_ON
5 Ground 17 Ground
6 +5 V 18 Ground
7 Ground 19 Ground
8 PWR_OK 20 Res (NC)
9 5 VSB 21 +5 V
10 +12 V 22 +5 V
11 +12 V 23 +5 V
12 +3.3 V 24 Ground
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Chapter 4: Motherboard Connections