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