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Rectangular silver metal server PSU with rear fan grille and two ATX power connectors

WMtec

WMtec 255W Server Power Supply for OptiPlex 3020 7020 9020 SFF T4GWM

SKU CH-98E9-J3E3H

255 W replacement PSU for OptiPlex 3020, 7020 and 9020 SFF systems, with 8-pin and 4-pin ATX connectors

  • Delivers 255 W to run OptiPlex SFF workstations reliably
  • Wide 100-240 V input suits global mains voltages
  • Includes 8-pin and 4-pin ATX connectors for motherboard power
  • Fits OptiPlex 3020 7020 9020 and T1700 small-form-factor chassis
  • New unit ready for immediate installation in compatible desktops

255W PSU for OptiPlex SFF

This 255W power supply unit is built for Dell OptiPlex 3020, 7020 and 9020 small form factor desktops. It replaces the original PSU using part numbers T4GWM, VPMVK, NT1XP, FP16X, YH9D7 or 3XRJ0. The unit accepts 100-240V input at 4.6A across 50-60Hz mains. It is a direct swap for failed or ageing factory units.

Who should use this and who should not

System builders repairing or maintaining OptiPlex 3020, 7020 or 9020 SFF chassis will find the correct connectors and form factor. It also fits the OptiPlex T1700 SFF. Buyers with tower, micro-tower or all-in-one variants cannot use this unit. Anyone needing higher wattage for discrete graphics upgrades should look at other solutions.

Deciding specification: 255W maximum output

The 255W rating sets the total power available for the motherboard, CPU, memory and any installed drives. The PSU provides one 8-pin ATX connector and one 4-pin ATX connector. If your build demands more than 255W combined draw, this supply will not support it. Check your component power requirements before purchasing.

Highlights

  • Delivers 255 W to run OptiPlex SFF workstations reliably
  • Wide 100-240 V input suits global mains voltages
  • Includes 8-pin and 4-pin ATX connectors for motherboard power
  • Fits OptiPlex 3020 7020 9020 and T1700 small-form-factor chassis
  • New unit ready for immediate installation in compatible desktops

Specifications

No published specifications for this item yet.

Questions about this item

How do I install the WMtec 255W PSU into an OptiPlex 3020 SFF, and which connector alignment step is often missed?

Remove the chassis side panel, slide the PSU into the bay until it clicks, secure the retention screw, then connect the 8-pin ATX and 4-pin ATX cables to the motherboard headers ensuring each keyed plug seats fully.

What maintenance will this 255W power supply need during its service life?

Periodically clean dust from the intake vents and internal fan with compressed air to maintain airflow; the unit has no user-serviceable parts and the electrolytic capacitors are not replaceable.

What is the first limit reached when this 255W PSU runs continuously at full load?

The 255 W maximum power rating is the primary limit; sustained operation at that level will trigger over-current or thermal protection before any other constraint appears.

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