We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Silver rectangular Dell proprietary server power supply unit with ventilation grille and power connector

DELL

DELL H240AS-00Product 240W server power supply

SKU CH-FA7T-D62BN MPN H240AS-00Product

Proprietary 240 W power supply with 3.3 V, 5 V, 12 V and -12 V rails for Dell Optiplex 790 and 990 desktops

  • Max wattage240 W
  • Product typeProprietary Power Supply
  • Delivers 240 W for reliable server operation
  • Single +12 V rail simplifies power distribution
  • Supplies 3.3 V, 5 V, 12 V and -12 V outputs
  • Compatible with Dell Optiplex 790 and 990 desktops
  • New proprietary Dell unit ensures exact fit

Dell H240AS-00 proprietary power supply

This 240W unit is a Dell proprietary power supply built for OptiPlex 790 and 990 desktop computers. It delivers 3.3V, 5V, 12V and -12V DC rails from a single +12V rail design. The part replaces manufacturer number 3WN11 in compatible systems. It is intended for owners restoring or servicing those specific Dell models.

Check compatibility before ordering

Verify that your system is a Dell OptiPlex 790 or 990, as this proprietary unit will not fit standard ATX cases or other motherboards. Confirm the existing power supply carries part number 3WN11 or model H240AS-00 to ensure the connector layout matches. No adapter cables are included for non-Dell platforms.

Thermals noise and power draw

The supply operates at up to 240W maximum output under normal desktop loads. A single internal fan manages cooling across the 3.3V, 5V, 12V and -12V rails. Acoustic output scales with load and chassis airflow in the OptiPlex 790 or 990 enclosure. No independent thermal or noise ratings are provided by the manufacturer.

How it compares

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

Price $32.99
Cheaper than about 92% of the 3,798 comparable items (median $131.99).
Max wattage 240 W
Lower than about 86% of the 235 comparable items (median 668 W).

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

Specifications

Product
Brand nameDELL
Product lineH240AS-00
Product typeProprietary Power Supply
Power
Max wattage240 W

Questions about this item

What comes with the Dell H240AS-00 power supply and what else is needed for installation?

The unit is a proprietary 240 W power supply with a single +12 V rail delivering 3.3 V, 5 V, 12 V and -12 V outputs. It fits directly into compatible Dell Optiplex 790 and 990 desktops using the existing chassis connector; no extra cables or adapters are required.

Which Dell desktop models is the H240AS-00 240 W unit compatible with?

This proprietary supply is listed for Dell Optiplex 790 and 990 desktop computers. Match the 3WN11 part number to your service tag to confirm the correct fit before ordering.

What does the 240 W rating mean for a running Optiplex 790 or 990?

The 240 W maximum covers the combined load of the motherboard, CPU, memory, drives and add-in cards through the single +12 V rail and the 3.3 V, 5 V and -12 V rails, allowing the system to operate within its original power budget.

More in Server & Hot-Plug PSUs

Similar items