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The P4 Mainboard Series
Page 16
2.4.4. ATX Power Supply Connectors (CN15-D optional)
Connector:
CN 15-A/ CN15-B/ CN15-D
Type:
20 pin block/2x2 12V/1x4 AUX12V
The
P4
mainboards each come with three onboard power supply connectors
labeled from CN15-A, CN15-B and CN-15D. CN15-A and CN15-B are regular
ATX12V power supply connectors. CN15A and CN15D are regular ATX power
supply connectors. The auxiliary power supply connector (CN15-D) is for a
+12V and +5V power supply. These increased power supplies are necessary to
provide extra power for the slot. The ATX 12V power supplies are all downward
compatible with standard ATX power supplies (see next page for diagram).
Hardware Installation
ATX Connectors Pin Assignments
CN15-A
CN15-B
Pin 1
+3.3VDC
Pin 11
+3.3VDC
Pin 1
COM
Pin 2
+3.3VDC
Pin 12
-12VDC
Pin 2
COM
Pin 3
COM
Pin 13
COM
Pin 3
+12VDC
Pin 4
+5VDC
Pin 14
PS_ON#
Pin 4
+12VDC
Pin 5
COM
Pin 15
COM
CN15-D
Pin 6
+5VDC
Pin 16
COM
Pin 1
+12VDC
Pin 7
COM
Pin 17
COM
Pin 2
COM
Pin 8
PWR_OK
Pin 18
-5VDC
Pin 3
COM
Pin 9
+5VSB
Pin 19
+5VDC
Pin 4
+5VDC
Pin 10
+12VDC
Pin 20
+5VDC