Genuine R622G Dell 1100W Power Supply Without Harness For the Precision T7500 System, Compatible Dell Part Number: G821T, Model Number: H1100EF-00 Genuine Dell 1100W Power Supply Without Harness AC Input(50-60Hz) 100-240/14A Tolerance Max Output Power: 1100W Model Number: H1100EF-00/ Compatible Part Numbers: G821T, R622G, W301G Compatible Systems: Precision T1500, T3500, T7500 and Alienware Area-51 ALX, XPS 730X Systems