MH596, MH595, NH429, P9550, U9087, X9072, MC638D280P-00, H280P-00, L280P-01, L280P-00, L280P-01, H280P-01, H280E-00Dell 280W power supply Optiplex 210L, 320, 330, 360, 740, 745, 755 GX520, GX620Warranty: 30 days