Genuine Dell 160W R5953 Power Supply PSU For OptiPlex GX280 Small Form Factor (SFF) and Dimension 4700C Systems Part Numbers: U5427, R5953, D6370, HP-L161NF3P REV 02, PS-5161-7DS, PS-5161-7DS2 Genuine Dell 160W R5953 Power Supply PSU Input: 100-240V , Output: 160w Max/ P1 - 20-Pin ATX Power, P2 - 4-Pin ATX Power, P3 - SATA Power, P4 - 4pin Floppy/CD, P5 - 4pin Floppy/CD, P6 - 5pin (6pin)(DELL SATA Connector) Compatible Systems: For Optiplex GX280 SFF or Dimension 4700c Compatible Part Numbers: U5427, R5953, D6370 Compatible Model Numbers: PS-5161-7DS, HP-L161NF3P REV 02, PS-5161-7DS2