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Chapter 4: Motherboard Connections
Chapter 4
Motherboard Connections
LEDs on the motherboard are also described here. A serverboard layout indicating component
locations may be found in Chapter 1.
Please review the Safety Precautions in Chapter 3 before installing or removing components.
4.1 Power Connections
Two power connections on the X11DDW-L must be connected to the power supply. The wiring
is included with the power supply.
• 24-pin Primary ATX Power (JPWR3)
• 8-pin Processor Power (JPWR1/JPWR2)
Main ATX Power Connector
JPWR3 is the 24-pin ATX main power supply connector. This primary power supply connector
JPWR2) CPU power connectors to your power supply.
Required Connection
Important: To provide adequate power to the motherboard, connect the 24-pin and the 8-pin
power connectors to the power supply. Failure to do so may void the manufacturer's warranty
on your power supply and motherboard.
ATX Power 24-pin Connector
Pin Denitions
Pin# Denition Pin# Denition
13 +3.3V 1 +3.3V
14 NC 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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