This is a, Genuine Dell 240W Watt 3WN11 H240AS-00 2TXYM 709MT Power Supply Unit PSU For Optiplex 790 and 990 Small Form Factor SFF Systems Compatible Part Numbers: RV1C4, J50TW, 2TXYM, 3WN11, 709MT, 592JG, 66VFV Compatible Model Numbers: AC240AS-00, L240AS-00, AC240ES-00, H240AS-00, H240ES-00, D240ES-00, DPS-240WB Features/Specifications: Genuine Dell 240W Power Supply Input: 100-240V Output: 240w Max Compatible Systems Optiplex 790 Small Form Factor (SFF) Optiplex 990 Small Form Factor (SFF) Compatible Part Numbers: RV1C4, J50TW, 2TXYM, 3WN11, 709MT, 592JG, 66VFV Compatible Model Numbers: AC240AS-00, L240AS-00, AC240ES-00, H240AS-00, H240ES-00, D240ES-00, DPS-240WB, Connectors: P1 - 24-Pin ATX Power P2 - 4-Pin ATX Power P3 - SATA Power P4 - SATA Power P5 - 2-pin Slim Line SATA