Genuine Dell 255w Power Supply (PSU), Replacement PSU For The Following Desktop (DT) Systems: Dimension 3100C, C521, Optiplex 320, 330, 360, 740, 745, 755, GX520, GX620, 210L, Replaces The Following Dell Part Numbers: KC672, K8965, M8801, M8803, MC638, NC912, N8374, MH595, MH596, NH429, P9550, RT490, U9087, X9072, F5114 MM720, WW109, JK930, Compatible Model Numbers: H220P-00, L220P-00, N220P-00, L280P-00, D280P-00, H280P-00, AA24100L Genuine Dell 255W Power Supply, Replacement PSU for the following Desktop Size (DT) Systems: Dimension 3100C, C521, Optiplex 320, 330, 360, 740, 745, 755, GX520, GX620, 210L Replaces the following Dell Part Numbers: KC672, K8965, M8801, M8803, MC638, NC912, N8374, MH595, MH596, NH429, P9550, RT490, U9087, X9072, F5114 MM720, WW109, JK930, Compatible Model Numbers: H220P-00, L220P-00, N220P-00, L280P-00, D280P-00, H280P-00, AA24100L 1x 24-Pin ATX Power Connector(Converted mini-ATX), 1x 4-Pin ATX Power Connector Choose from 2 SATA or 1 SATA + 2 MOLEX (Converted SATA) 1x Floppy Drive Power Connector