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Silver rectangular internal server power supply unit with Dell branding

DELL

DELL M8805Product ATX12V Server Power Supply 305 W

SKU CH-3P0D-39E1W MPN M8805Product

A 305 W ATX12V internal power supply compatible with Dell Dimension 5100, 5150, E510 and OptiPlex 320, GX620 desktops

  • Product typePower Supply
  • Delivers 305 W output power for stable system operation
  • ATX12V form factor fits standard internal mounting points
  • Compatible with Dell Dimension 5100, 5150 and E510 desktops
  • Compatible with Dell OptiPlex 320 and GX620 desktops
  • Genuine Dell part M8805 ensures exact fit and function

Dell M8805 305 W ATX12V Server Power Supply

This Dell M8805 is an internal ATX12V server power supply rated at 305 W output power. It is designed as a direct replacement for compatible Dell Dimension and OptiPlex desktop systems requiring this specific form factor and wattage.

Verify your system model before ordering

Confirm that your computer is a Dell Dimension 5100, 5150 or E510, or a Dell OptiPlex 320 or GX620. The M8805 will not fit other Dell desktops or standard ATX cases because the connector layout and mounting brackets match only the listed models.

Steady 305 W delivery under continuous load

The unit maintains its rated 305 W output during sustained operation rather than only in short bursts. This consistent delivery supports stable power for the CPU, memory and onboard components of the compatible Dell workstations during extended workloads.

How it compares

Measured against everything we stock in Server & Hot-Plug PSUs, at today’s prices. Recalculated every night.

Price $86.99
Cheaper than about 74% of the 3,798 comparable items (median $131.99).

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Specifications

Product
Brand nameDELL
Product typePower Supply

Questions about this item

Does the Dell M8805 305 W ATX12V power supply ship with all required cables and mounting screws, or must I source any separately?

The unit is an internal ATX12V power supply rated at 305 W. It includes the fixed output cables and standard mounting hardware needed for installation in compatible Dell chassis.

My Dell OptiPlex GX620 needs a replacement PSU; is the M8805 the correct 305 W model for that system?

Yes. The M8805 is listed as compatible with the Dell OptiPlex GX620 and Dell Dimension 5100, 5150 and E510 desktops.

Will the 305 W rating on the M8805 reliably run a Dell Dimension 5150 with a dedicated graphics card and multiple drives?

The 305 W output is the continuous power rating for the ATX12V supply. It supports the original component configurations shipped in the listed Dimension and OptiPlex models.

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