Genuine Dell 275 Watt Power Supply for Dimension 5100c, 5150c, XPS 200, Optiplex GX520, GX620 Small Form Factor (SFF) Systems. Note: Buyer will receive any of the identical part numbers: K8964, TD570, YD080, WD861. Connectors: P1 - 24-pin ATX Motherboard Power, P2 - 4-pin Motherboard Power, P3 - 4-pin SATA Standard Power Connector.