For advanced users, this PSU is surprisingly flexible. Its voltage can be adjusted from its stock 12V up to around 14V or more for specialized applications. This involves changing a resistor (often labeled R175 ) in the feedback circuit.
To use this PSU in a standard PC, you need a 20-pin to 20-pin adapter. Do just use a straight-through cable. Map the Dell pinout to the standard ATX pinout:
Before we discuss how to use this PSU, it's crucial to understand what you should never do with it.
The D220P-01 will not output 12V unless a signal is applied to pin 8. This feature allows the original Dell USFF computer to turn the power supply on and off remotely.