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Silver metal rectangular ATX power supply unit with fan grille and cable bundle

DELL

Dell M8806 ATX12V 305 W power supply

SKU CH-JCRW-EBEGT

An internal ATX12V unit delivering 305 W for compatible Dell Dimension and OptiPlex desktops

  • Max wattage305 W
  • Product typeATX 12 V
  • Product weight4
  • Delivers 305 W for stable system operation
  • ATX12V form factor fits standard internal bays
  • Designed for Dell Dimension 5100, 5150, E510 desktops
  • Compatible with OptiPlex 320, 320 Mini-Tower, GX620 models
  • Genuine Dell M8806 unit ensures correct pinouts and fit

Dell M8806 305 W ATX12V Power Supply

This Dell M8806 unit is a 305 W ATX12V internal power supply built for specific Dell desktops. It serves as a direct replacement for the original unit in compatible Dimension and OptiPlex systems. The supply delivers the standard ATX12V voltages required by those platforms. Buyers restoring or repairing a listed model will find the correct fit and connector layout.

ATX12V standard limits and proprietary fit

The ATX12V design provides the 12 V rail configuration expected by the target motherboards. Maximum output is capped at 305 W so the unit cannot support high-wattage processors or discrete graphics cards that exceed this budget. Physical dimensions and mounting points follow the Dell chassis specifications for the listed models rather than a generic ATX footprint. Connectors are arranged for the proprietary headers found on those boards.

Check your Dell model and power needs

Verify the exact system model against the supported list: Dimension 5100, 5150, E510 and OptiPlex 320, 320 Mini-Tower, GX620. Confirm the existing power supply carries part number M8806 to ensure connector compatibility. Assess whether the installed components stay within the 305 W limit before ordering. This unit is not suitable for non-listed Dell chassis or custom builds requiring standard ATX mounting.

How it compares

Measured against everything we stock in ATX Desktop Power Supplies, at today’s prices. Recalculated every night.

Price $102.99
Cheaper than about 66% of the 10,869 comparable items (median $142.99).
Max wattage 305 W
Lower than about 92% of the 930 comparable items (median 850 W).

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Specifications

Product
Brand nameDELL
Product typeATX 12 V
Power
Max wattage305 W

Questions about this item

Which Dell desktop models does the M8806 305 W unit support?

The M8806 is compatible with Dell Dimension 5100, 5150, E510 and OptiPlex 320, 320 Mini-Tower and GX620 desktops.

What does the 305 W rating mean for a Dimension or OptiPlex system?

It supplies up to 305 watts total to the motherboard, drives and add-in cards inside those Dell chassis.

What power standard does the ATX12V label indicate for this supply?

ATX12V means the unit follows the ATX 12 V specification used by the listed Dimension and OptiPlex motherboards.

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