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New black rectangular 255W power supply unit with 8-pin and 4-pin ATX connectors

Vszerda

Vszerda 255W power adapter H255ES-00 for Dell Optiplex 3020 7020 9020 Precision T1700 SFF

SKU CH-JR7W-25EHR

255 watt power supply with 8-pin and 4-pin ATX connectors for Dell Optiplex 3020, 7020, 9020 and Precision T1700 small form factor systems

  • 255 W maximum output powers Dell OptiPlex 3020, 7020, 9020 and Precision T1700 SFF systems
  • Wide 100–240 V AC input at 50–60 Hz works on mains worldwide
  • 8-pin and 4-pin ATX connectors supply both motherboard and CPU power rails
  • Replaces Dell part numbers including H255ES-00, D255AS-00, YH9D7 and R7PPW
  • Brand-new unit includes the power supply only for direct SFF chassis installation

255W SFF Replacement Power Supply

This 255W unit replaces the original power supply in Dell OptiPlex 3020, 7020 and 9020 Small Form Factor desktops as well as the Precision T1700 SFF. It is built for IT technicians and small-business owners who need a direct, new-component swap for a failed or ageing PSU in these specific chassis.

8-Pin and 4-Pin ATX Connectors

The adapter provides an 8-pin ATX connector (P1) and a 4-pin ATX connector (P2), matching the motherboard power headers used in the listed Dell SFF systems. Universal 100–240V AC input at 50–60 Hz allows the unit to operate on mains power worldwide without a voltage selector switch.

Replaces OEM Part Numbers H255ES-00 and D255AS-00

This supply covers the full range of Dell OEM part numbers including H255ES-00, D255AS-00, D255E001L, F255ES-00 and PS-3261-2DF, plus service tags such as YH9D7 and R7PPW. It is not suitable for tower, micro or all-in-one form factors, nor for systems requiring higher wattage or different connector layouts.

Highlights

  • 255 W maximum output powers Dell OptiPlex 3020, 7020, 9020 and Precision T1700 SFF systems
  • Wide 100–240 V AC input at 50–60 Hz works on mains worldwide
  • 8-pin and 4-pin ATX connectors supply both motherboard and CPU power rails
  • Replaces Dell part numbers including H255ES-00, D255AS-00, YH9D7 and R7PPW
  • Brand-new unit includes the power supply only for direct SFF chassis installation

Specifications

No published specifications for this item yet.

Questions about this item

What 8-pin and 4-pin ATX connectors does the H255ES-00 supply for the Dell Optiplex SFF motherboard?

The unit provides one 8-pin ATX power connector (P1) and one 4-pin ATX power connector (P2) for the motherboard.

Does the 255W PSU fit the small-form-factor chassis of the Optiplex 3020, 7020, 9020 and Precision T1700?

Yes, it is built for the Dell Optiplex 3020, 7020, 9020 and Precision T1700 Small Form Factor cases.

How do I swap the old PSU for this H255ES-00 in a Dell SFF, and which cable is often missed?

Remove the side panel, unplug the 8-pin and 4-pin ATX cables from the old unit, slide the new PSU into the bay, secure it with the chassis screws, then reconnect both ATX cables — the 4-pin CPU power plug is the one most often forgotten.

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