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Dell MPX3V 250W power supply unit for OptiPlex 390 and 790

DELL

DELL MPX3V 250W PSU OptiPlex 390 790

SKU CH-E57Z-M8E40

250 watt power supply for OptiPlex 390 and 790 desktops

  • 250-watt output powers OptiPlex 390 and 790 desktops
  • Dell-manufactured unit matches original MPX3V part number
  • New condition ensures full rated capacity from day one
  • Direct replacement restores system power without adapter cables

Dell MPX3V 250W PSU for OptiPlex 390 and 790

This new Dell power supply delivers 250 watts of power. It is designed specifically for OptiPlex 390 and 790 desktop systems. The unit carries part number MPX3V and serves as a direct replacement component.

Buyers needing higher wattage

This supply suits owners of OptiPlex 390 or 790 desktops replacing a failed or missing unit. Builders working with other chassis, proprietary pinouts, or higher power demands should look at other options.

How it compares

Measured against everything we stock in SD & MicroSD Memory Cards, at today’s prices. Recalculated every night.

Price $37.99
Cheaper than about 57% of the 1,947 comparable items (median $46.99).

Specifications

No published specifications for this item yet.

Questions about this item

How loud or hot does the 250W PSU get when the OptiPlex 390 runs all day?

The 250W unit is a standard ATX supply with a single cooling fan; under typical office loads it stays within normal thermal limits for the OptiPlex 390 chassis.

Which motherboard power connectors must my OptiPlex 790 already have for this PSU to work?

This supply provides the standard 24-pin ATX connector plus a 4-pin CPU power plug that matches the OptiPlex 790 motherboard.

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