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Dell 265W power supply unit for OptiPlex 790 990 mini tower

DELL

DELL 9D9T1 265W Power Supply OptiPlex 790 990 Mini Tower

SKU CH-MMAW-Y9J9K

A 265 W power supply for OptiPlex 790 and 990 mini-tower desktops

  • Product typePower Supplies
  • Genuine Dell replacement fits OptiPlex 790 and 990 mini-tower chassis
  • 265 W output powers the original system configuration reliably
  • New condition ensures full service life from first installation
  • Direct-fit unit matches the AC265AM-00 specification without adapters

Dell OptiPlex 790 and 990 MT 265W power supply

This 265 watt power supply is built for Dell OptiPlex 790 and 990 Mini Tower desktops. It replaces the original Dell AC265AM-00 unit in those specific chassis. The part number is 9D9T1. It is sold new and ready for installation.

Compatibility limited to OptiPlex 790

This supply fits only the Mini Tower versions of the OptiPlex 790 and 990. It will not fit small form factor, ultra-small form factor or later OptiPlex generations. Builders using different Dell chassis or non-Dell cases cannot use this unit.

How it compares

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

Price $33.99
Cheaper than about 92% of the 3,798 comparable items (median $131.99).

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Specifications

Product
Brand nameDELL
Product typePower Supplies

Questions about this item

What does the 265 W rating mean once the unit is installed in an OptiPlex 790 or 990 Mini Tower?

The 265 W rating is the maximum continuous AC power the supply can deliver to the motherboard, drives and expansion cards inside the OptiPlex 790 or 990 Mini Tower chassis.

Which power interface does this supply use and what does it limit in practice?

It uses the Dell proprietary ATX-style connector keyed for OptiPlex 790 and 990 Mini Tower motherboards, limiting use to those specific systems.

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