Dell OptiPlex 330 (Late 2007) - Manual (Page 36)

Power Supply DC Connector Pin Assignments
DC Power Connector P1
13 PCI card connectors
(SLOT2 and SLOT3)
14 internal buzzer (SPKR)
15 serial/ PS/2 connector (PS2/SER2) 16 fan connector (FAN_CPU)
17 floppy drive connector (FLOPPY)
Pin Number Signal name Wire Color Wire Size
1 3.3 V Orange 20 AWG
2 3.3 V Orange 20 AWG
3 RTN Black 20 AWG
4 5 V Red 20 AWG
5 RTN Black 20 AWG
6 5 V Red 20 AWG
7 RTN Black 20 AWG
8 POK Gray 22 AWG
9 5 V AUX Purple 20 AWG
10 +12 V Yellow 20 AWG
11 +12 V Yellow 20 AWG
12 3.3 V Orange 20 AWG
13 3.3 V Orange 20 AWG
14 -12 V Blue 22 AWG
15 RTN Black 20 AWG
16 PS_ON Green 22 AWG
17 RTN Black 20 AWG
18 RTN Black 20 AWG
19 RTN Black 20 AWG
20 OPEN