The Dell OptiPlex 990 Desktop AC240AS-00 240W Power Supply 0RV1C4 RV1C4 is a power module designed specifically for the OptiPlex 990 desktop model. With a maximum power output of 240W, this power supply unit is compatible with the OptiPlex 990 and is made by Dell, a trusted brand in the computer industry. Originating from China, this power supply ensures reliable performance and efficient power delivery for your computer system.