Genuine Dell 280W Desktop Optiplex GX520, GX620, 740, 745, 755, 210L, 320, 330, Dimension C521, 3100C, New Style GX280, Power Supply Unit PSU enuine Dell 280W Power Supply For Dell Optiplex GX520, GX620, 740, 745, 755, 210L, 320, 330 Desktop Systems Dell Dimension C521, 3100C and New style GX280 Systems Input: 100-120V or 200-240V Input | Output: 280W Max | Powe Supply Connectors: 1 x 24-pin Motherboard Power, 2 x SATA Power Connectors, 1 x 4-Pin Molex, 1 x Floppy Power Connector, 1 x 4-Pin ATX Power Connector Compatible with the following Dell Desktop Systems: Dell Optiplex GX520, GX620, 740, 745, 755, 210L, 320, 330 Desktop Systems | Dell Dimension C521, 3100C | New style GX280 Systems Compatible Dell Part Numbers: MH596, MH595, RT490, NH429, P9550, U9087, X9072, NC912, JK930 Compatible Dell Model Numbers: AA24100L, D280P-00, H280P-00, L280P-01, H280P-01, L280P-0, L220P-00, AA24120L, N220P-00, PS-5281-5DF-LF, H290E-00,