The sense wires are the double wires that are found on the 24 pin cable. These wires sense the voltage at the motherboard end and do not send any voltage of their own. Corsair, Silverstone, and Cooler Master power supplies use four sense wires and EVGA uses five. They are used to monitor the 12v, 5v, 3.3v rails, as well as a ground (with two ground sense wires on the EVGA PSU).The sense wires are required for stable operation with Corsair SF Platinum, Cooler Master, and EVGA PSUs.Cables for Corsair SF Gold and Silverstone PSUs are still 100% stable without the sense wires installed. Myself and many of my customers have found their overclocks and undervolts to be completely stable without the sense wires with the above power supplies. However, the sense wires can still be added to these PSU types if desired.A Corsair 24 pin cable with sense wires has full compatibility with both the Corsair SF Gold and Corsair SF Platinum PSUs.