You are offerding on fully functional Dell 875watt Power Supply Unit pulled from an Alienware R3 System. The PSU has proprietary wiring female socket on the unit however the harness adapts it to standard motherboard pin connection for standard motherboards. The only thing not included in from the pictures in this sale is a black hard drive SATA cable that was accidentally mixed in with the harness picture on the left side, which I discarded after taking the picture.Make sure you know what you are buying.sale is Sold as-is. same as if you bought this at a garage sale. No returns.