Genuine Dell Power Supply 305W for Dimension 4700 and 8400 OptiPlex GX280 Compatible part numbers: Y2103, G3148, Y2682, C3760 Compatible Models: PS-6311-1DFS, NPS-305AB C, PS-6311-1DS, NPS-305BB C **Guaranteed Dell Genuine** Part Number: G3148 Model: NPS-305AB C Max. Output Power: 305W **Ship within 24 hours except for holidays and weekends**