Rexus 3Pin Fan Cable To Dell Pin Adapter. This 3-Pin Fan Cable Adapter is compatible with Dell Compatible desktops that require the special connector. A great way to use other high quality fans for your Dell system without having to pay extra for their proprietary fans. Standard white 3 pin housing on one end and the Dell 3 pin connector for attaching to Dell main boards. 12 inch length, 3 wire.