Dell D220p 01 Power Supply Pinout 2

Most D220P-01 units include a small 4-pin square connector (often labeled "P4") for the CPU VRM. This matches the standard ATX12V connector electrically, but check the colors.

Wiring caution: This 4-pin connector is keyed identically to standard P4 connectors. It is safe to use on any standard motherboard that requires a 4-pin CPU power.

Warning: The D220P-01 does not require a load on +5V or +12V to start, unlike some older ATX supplies. However, for stable voltage regulation, a minimum load of 1-2A on +5V is recommended (use a 2.5Ω, 10W resistor or an automotive bulb on the red/black wires of the main connector). Dell D220p 01 Power Supply Pinout 2

Unlike standard ATX power supplies that route every necessary signal through a single 20- or 24-pin motherboard connector, Dell used a split design in many Optiplex models:

Why "Pinout 2"? Many users searching for "pinout 2" are specifically looking for the second connector’s pin assignment. The main 20-pin is well-documented, but the smaller connector varies between Dell models. For the D220P-01, the secondary connector is a 6-pin Molex 22-01-2065 (or compatible) with a specific keying that prevents plugging into standard 4-pin floppy or fan headers. Most D220P-01 units include a small 4-pin square

The D220P-01 is a decent, compact PSU for its age, but its non‑standard pinout makes it a headache for DIY projects unless you have the exact wiring diagram. Below is the accurate pinout for its two main motherboard connectors (P1 & P2). Use this at your own risk.

| Pin | Wire Color | Signal | ATX Equivalent? | |-----|------------|--------|------------------| | 1 | Grey | +5V SB | Yes (same) | | 2 | Black | GND | Yes | | 3 | Black | GND | Yes | | 4 | Orange | +3.3V | Yes | | 5 | Red | +5V | Yes | | 6 | Red | +5V | Yes | | 7 | Blue | -12V | Yes | | 8 | Yellow | +12V1 | Yes | | 9 | Yellow | +12V1 | Yes | | 10 | Brown | +12V2 | No – Secondary 12V | | 11 | Black | GND | Yes | | 12 | Orange | +3.3V | Yes | | 13 | Orange | +3.3V | Yes | | 14 | White | -5V | Obsolete – rarely used now | | 15 | Black | GND | Yes | | 16 | Green | PS_ON | Yes (active low) | | 17 | Black | GND | Yes | | 18 | Grey | PWR_OK | Yes | | 19 | Red | +5V | Yes | | 20 | Purple | +5V SB | Yes | Wiring caution: This 4-pin connector is keyed identically

Critical difference: Pin 10 is Brown (+12V2), not the typical -5V or empty.
Missing: No +12V on Pin 10 in ATX; do not plug into a standard motherboard without an adapter.

| Pin Number | Color | Signal Name | Description | | --- | --- | --- | --- | | 1 | Black | Ground | Ground | | 2 | Black | Ground | Ground | | 3 | Black | Ground | Ground | | 4 | Black | Ground | Ground | | 5 | Red | +5V | +5 Volts | | 6 | Red | +5V | +5 Volts | | 7 | Red | +5V | +5 Volts | | 8 | Red | +5V | +5 Volts | | 9 | Orange | PWR_ON | Power On Signal | | 10 | Black | Ground | Ground | | 11 | Yellow | 5VSB | Standby +5V | | 12 | Black | Ground | Ground | | 13 | Red | +3.3V | +3.3 Volts | | 14 | Red | +3.3V | +3.3 Volts | | 15 | Black | Ground | Ground | | 16 | Black | Ground | Ground | | 17 | Red | +3.3V | +3.3 Volts | | 18 | Red | +3.3V | +3.3 Volts | | 19 | White | PS_OK | Power Good Signal | | 20 | Black | Ground | Ground | | 21 | Red | +5V | +5 Volts | | 22 | Black | Ground | Ground | | 23 | Black | Ground | Ground | | 24 | Black | Ground | Ground |