Genuine Dell Dimension 305W Power Supply for Dimension 4700, 8400 and Optiplex GX280 Small Mini-Tower (SMT) Systems Part Numbers: Y2103, G3148, Y2682, C3760 Model Numbers: NPS-305BB Genuine Dell 305W Power Supply For Dell Dimension 4700 and 8400 For Dell Optiplex GX280 Compatible part numbers: Y2103, G3148, Y2682, C3760