220W compact internal power supply for select legacy Compaq desktop systems requiring a 20-pin motherboard connector, 4-pin processor connector, separate 2-pin control lead, and legacy drive-power connectors. Although “250” appears in the model number, the maximum total output shown on the factory label is 220W.
277910-001, 277919-001, 277978-001, 277979-001, DPS-250RB A, DPS-250RB-1 A, DPS-250RB-1A, PDP-121, PDP-121P, PS-6221-2C, PS-6221-2CF
DPS-250RB-1 A may also be written as DPS-250RB-1A, DPS-250RB-1-A, or DPS-250RB 1A. These are alternate formatting styles for the same model designation.
This power supply has a standard IEC C14 AC inlet. Add the cable below if the original power cord is missing, damaged, or not included.
⭐ 5120P - 6FT 125V NEMA 5-15P to IEC C13 Power Cord - Grounded North American AC power cable for connecting the power supply to a standard wall outlet. Sold separately.
Compatibility is limited to configurations originally equipped with one of the listed 220W power-supply part numbers and the matching 20-pin, 4-pin, 2-pin, Molex, and mini Berg connector arrangement.
✔️ Compaq Presario Desktop: Presario 6000 Series configurations originally equipped with 277919-001, 277978-001, PDP-121, or PS-6221-2C
✔️ Compaq Evo Microtower: Evo D310 Microtower configurations originally equipped with 277910-001 or 277979-001
✔️ Compaq Business Desktop: D315 Microtower configurations originally equipped with 277910-001 or 277979-001
✔️ Compaq Evo Convertible Minitower: Evo D510 Convertible Minitower configurations originally equipped with 277910-001 or 277979-001
✔️ Vectra Desktop: Vectra VL430 configurations originally equipped with 277910-001 or 277979-001 and the matching power-supply enclosure and connector arrangement
☑️ Factory-rated 220W maximum total output
☑️ Compact enclosure for compatible legacy desktop systems
☑️ 20-pin ATX-style motherboard connector
☑️ Separate 4-pin ATX12V processor connector
☑️ Separate 2-pin system control connector
☑️ Four legacy 4-pin Molex power connectors
☑️ Two mini Berg floppy-drive power connectors
☑️ +12.8V output required by the original system architecture
☑️ Dual-voltage AC input with manual 115V / 230V selector
☑️ Standard IEC C14 inlet for an IEC C13 power cord
✓ Maximum total output is 220W. The “250” in DPS-250RB is part of the model number and does not indicate 250W output.
✓ DPS-250RB-1 A, DPS-250RB-1A, and DPS-250RB-1-A are alternate formatting styles for the same model designation.
✓ The replacement must provide the matching +12.8V output and separate 2-pin control connector.
✓ The attached harness includes one 20-pin motherboard connector, one 4-pin processor connector, four Molex connectors, and two mini Berg connectors. It does not include SATA or PCIe power connectors.
✓ Confirm that the approximately 130mm x 98mm x 153mm enclosure and mounting locations match the original power supply.
✓ Set the rear voltage selector correctly before connecting AC power: 115V for 100-127V service or 230V for 200-240V service.
