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Compact silver SFF power supply unit with rear fan grille and power socket

WMtec

WMtec SFF Power Supply 240W OptiPlex 390 790 990

SKU CH-W2HB-BYH62

A 240 W small-form-factor supply tested for OptiPlex 390, 790 and 990 desktops, accepting 100-240 V input at 50-60 Hz

  • Delivers 240 W to power OptiPlex 390 790 990 SFF systems
  • Replaces Dell part numbers VMRD2 1GC38 N9MWK L240AS-00 AC240ES-01 D240ES-01
  • Accepts 100-240 V 3.6 A input for worldwide mains compatibility
  • Operates at 50-60 Hz for stable output across regions
  • Fully tested new unit ensures reliable small-form-factor operation

SFF 240W replacement for OptiPlex 390 790 990

This small-form-factor power supply delivers 240W to Dell OptiPlex 390, 790 and 990 SFF chassis. It accepts 100-240V input at 3.6A and 50-60Hz. The unit is new and fully tested.

Replaces Dell L240AS-00 AC240ES-01 D240ES-01 units

Direct swap for part numbers VMRD2, 1GC38 and N9MWK. The jump is worth it when the original supply has failed or shows instability under load. No adapter cables or bracket changes are required.

Fits SFF chassis with standard IEC inlet

Connects to the motherboard and drive power connectors already present in the OptiPlex SFF. Frees the builder from hunting proprietary pin-outs. Buyers needing higher wattage for discrete graphics upgrades should verify chassis and motherboard limits first.

How it compares

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

Price $56.99
Cheaper than about 85% of the 3,798 comparable items (median $131.99).

New to this? Buying PC parts with Monero — what to check, what it costs to pay, and what is never asked for.

Specifications

No published specifications for this item yet.

Questions about this item

Will this 240 W SFF unit fit a Dell OptiPlex 390, 790 or 990 small-form-factor chassis?

Yes — it is built for the OptiPlex 390, 790 and 990 SFF and matches part numbers VMRD2, 1GC38 and N9MWK.

What is the installation step people most often miss when swapping this supply?

Route the main ATX and CPU power cables through the chassis cut-out before securing the unit with its four mounting screws.

Which component will likely need replacement first on a 240 W SFF supply running 50-60 Hz mains?

The internal electrolytic capacitors age with heat cycles; plan to refresh them after several years of continuous use.

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