Dell AC240AS-00 240W Small Form Factor Power Supply — For OptiPlex 390, 790, 990, 3010, 7010, 9010 SFF

One spare power supply that covers several generations of OptiPlex SFF desktops.

The Dell AC240AS-00 is a 240W small form factor power supply for Dell OptiPlex 390, 790, 990, 3010, 7010 and 9010 SFF desktops. It uses Dell’s SFF mounting and connectors and accepts 100–240V AC input. It suits IT teams keeping spare parts for mixed OptiPlex fleets.

Simplifying Spare Parts for OptiPlex Fleets

Offices often run several generations of OptiPlex desktops side by side. Keeping a different power supply on hand for each model adds cost and storage space.

The AC240AS-00 covers six common SFF models across two OptiPlex generations. A single spare restores a failed desktop quickly, without waiting for model-specific parts.

Factory Fit and Connectors

The unit uses the same SFF housing, latch mounting and Dell motherboard connectors as the original. It installs in minutes and does not require cable adapters.

Reliable Office Power

A 240W output covers office configurations with Intel Core processors, SSDs or hard drives and low-profile cards. Universal input simplifies deployment across regions.

Setup Instructions

How to Replace the Dell AC240AS-00

1. Shut down the OptiPlex SFF desktop, unplug the AC cord and press the power button for a few seconds to drain residual power.
2. Open the side panel, photograph the cable routing, then disconnect the power cables from the motherboard, drives and any graphics card.
3. Remove the mounting screws or release latch, take out the old unit and install the replacement in the same position.
4. Reconnect every cable, close the case, plug in the AC cord and power on to confirm the system boots and the fan spins.