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Refurbished Dell NH493 305 W ATX power supply unit, silver metal case

DELL

DELL NH493 305 W power supply for OptiPlex 330, 740, 745

SKU CH-RE6P-K9NP8 MPN NH493

Refurbished 305 W ATX12V/EPS12V unit with 24-pin connector for OptiPlex 330, 740 and 745 systems

  • TypeATX12V / EPS12V
  • Maximum Power305 W
  • Main Connector24Pin
  • FeaturesCompatibility: Dimension E520 Dimension E521 OptiPlex 330 Op
  • 305 W output powers OptiPlex 330 and 745 desktops
  • ATX12V and EPS12V design fits standard chassis
  • 24-pin main connector matches Dell motherboard layout
  • Tested for Dimension E520 and E521 systems
  • Refurbished unit validated for GX745 775 platforms

305 W ATX power supply for OptiPlex

The Dell NH493 is a refurbished ATX12V/EPS12V power supply rated at 305 W. It uses a standard 24-pin main connector to power the motherboard. This unit is designed as a direct replacement for the original power supplies installed in specific Dell OptiPlex and Dimension desktop chassis.

Fits OptiPlex 330, 740, 745 and Dimension 520, 521

Compatible models include the OptiPlex 330, 740 and 745 in both desktop and mini-tower form factors, plus the Dimension E520 and E521. Builders working on other Dell lines, proprietary small-form-factor cases, or non-Dell motherboards requiring different connector layouts should look elsewhere.

305 W maximum output decides suitability

The single figure that determines fit is the 305 W maximum power rating. Systems configured with higher-wattage CPUs, discrete graphics cards or multiple drive arrays that exceed this limit will need a higher-capacity unit instead.

Besonderheiten

  • 305 W output powers OptiPlex 330 and 745 desktops
  • ATX12V and EPS12V design fits standard chassis
  • 24-pin main connector matches Dell motherboard layout
  • Tested for Dimension E520 and E521 systems
  • Refurbished unit validated for GX745 775 platforms

Technische Daten

BrandDELL
ModelNH493
TypeATX12V / EPS12V
Maximum Power305 W
Main Connector24Pin
FeaturesCompatibility:
Dimension E520
Dimension E521
OptiPlex 330
OptiPlex 330 Desktop
OptiPlex 330 Mini-Tower
OptiPlex 740Optiplex 740 Desktop
Optiplex 740 Mini-TowerOptiPlex 740 MLK
OptiPlex 745
OptiPlex 745 Desktop
Versandgewicht1.81 kg
Paketgröße432 × 305 × 102 mm

Fragen zu diesem Artikel

Will the 24-pin main connector and ATX12V/EPS12V design fit my OptiPlex 745 mini-tower chassis?

The 24-pin main connector and ATX12V/EPS12V form factor match the OptiPlex 745, 740, 330, Dimension E520 and E521 chassis listed for this 305 W unit.

What is the correct order for seating the 24-pin motherboard plug and the CPU power lead during installation?

Seat the 24-pin motherboard connector fully first, then attach the CPU power lead; reversing the order often leaves the 24-pin partially seated.

How often should the internal fan and heatsink be cleaned on a refurbished 305 W supply running in an OptiPlex 330?

Clean the fan intake and heatsink fins with compressed air every 6 to 12 months to maintain airflow and protect the 305 W output rating.

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