Dell M8806 ATX12V 305 W power supply

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.