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Silver internal ATX12V power supply unit, 305 W output

DELL

DELL NH493Product ATX12V Power Supply 305 W

SKU CH-GYDJ-F45HB MPN NH493Product

A 305 W ATX12V power supply compatible with Dell Dimension, OptiPlex and PowerEdge systems

  • 305 W output powers compatible Dell desktops and servers
  • Internal ATX12V form factor fits Dell Dimension, OptiPlex and PowerEdge chassis
  • Genuine Dell NH493 part ensures correct voltage rails for listed systems
  • Supports Dell Dimension 520, 521 and 52000E models
  • Supports OptiPlex 320, 330, 740, 745, 755 and PowerEdge SCT100, T105

Replacement PSU for Dell Dimension and OptiPlex

This 305 W ATX12V unit is built as a direct replacement for the original power supply in listed Dell Dimension and OptiPlex desktops. It also fits the PowerEdge SCT100 and T105 servers. The internal form factor matches the chassis mounting points used by these systems. Buyers who need a higher wattage or a different connector layout should look elsewhere.

Output rating of 305 watts

The single specification that decides fit is the 305 W output rating. Only systems designed for this exact power level should use the unit. Installing it in a chassis that demands more power can cause instability or shutdowns. Conversely, systems requiring less power will not gain any benefit from the higher capacity.

Thermals and noise in normal use

As an internal power supply, it relies on the host system's airflow for cooling. Acoustic output and thermal behaviour will follow the design of the specific Dell chassis it is installed in. Power draw at the wall varies with the actual load of the connected components.

How it compares

Measured against everything we stock in Switch Modules, Transceivers & Add-Ons, at today’s prices. Recalculated every night.

Price $38.99
Cheaper than about 70% of the 1,517 comparable items (median $68.99).

Specifications

Product
Brand nameDell

Questions about this item

How much power does the 305 W ATX12V supply deliver to a Dell Dimension or OptiPlex system?

The unit provides up to 305 W of continuous output, matching the original specification for the listed Dell Dimension and OptiPlex desktops.

What power connector standard does this NH493 supply use for the motherboard?

It uses the standard ATX12V connector layout required by the compatible Dell Dimension and OptiPlex motherboards.

Will this internal power supply fit inside a Dell PowerEdge SCT100 or T105 chassis?

Yes, the internal form factor is designed for the Dell PowerEdge SCT100 and T105 as well as the listed Dimension and OptiPlex models.

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