Genuine Dell 275W Watt Power Supply Unit PSU Fits Dell Optiplex GX520, GX620, Dimension 5100C, 5150C Small Form Factor Systems SFF Replaces Part Numbers: K8964, TD570, YD080, N8373, WD861, Replaces Model Numbers: N275P-00, H275P-00, HP-L2757F3P LF, NPS-275BB A Genuine Dell 275W Replacement Power Supply Unit For Dell Optiplex GX520, GX620, Dimension 5100C, 5150C Small Form Factor Systems Connectors: 1x 24-Pin Connector | 1x 4-Pin ATX Power Connector | 1x SATA Power Connector | 1x 4-Pin Floppy Disc Drive Connector Input: Input: 100-240V~/6A, 200-240~/3A | Output: 275w Max | Replaces Part Numbers: K8964, TD570, YD080, N8373, WD861 | Compatible With the Following Systems: Dell Optiplex GX520, GX620, Dimension 5100C, 5150C Small From Factor Systems Replaces Model Numbers: N275P-00, H275P-00, HP-L2757F3P LF, NPS-275BB A