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Chapter 4: Motherboard Connections
Chapter 4
Motherboard Connections
LEDs on the motherboard are also described here. A motherboard layout indicating component
locations may be found in Chapter 1. More detail can be found in the Motherboard Manual.
Please review the Safety Precautions in Appendix A before installing or removing components.
4.1 Power Connections
Two power connections supply the motherboard and several more supply for onboard devices.
ATX Power Supply Connector
must also connect the 8-pin (JPWR1) and 4-pin (JPWR2) processor power connector to the
power supply.
Required Connection
ATX Power 24-pin Connector
Pin Denitions
Pin# Denition Pin# Denition
13 +3.3V 1 +3.3V
14 -12V 2 +3.3V
15 Ground 3 Ground
16 PS_ON 4 +5V
17 Ground 5 Ground
18 Ground 6 +5V
19 Ground 7 Ground
20 Res (NC) 8 PWR_OK
21 +5V 9 5VSB
22 +5V 10 +12V
23 +5V 11 +12V
24 Ground 12 +3.3V
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