This Dynamode 10cm 4 Pin Molex to 6 Pin PCle Cable will power a PCI Express expansion card. The cable is necessary if your power supply unit PSU does not have a PCI Express port but has two 4 pin peripheral cables available. Let the 4 Pin Molex to 6 Pin PCle Cable handle all your expansion card power needs! General Information Connectors 4 Pin Molex to 6 Pin PCle Length 0.10m Material Liquid Crystal Polymer LCP Plastic Resin Tin plated