The 24-pin ATX/EPS power startup jumper bridging tool is compatible with the 20/24-pin connector. The test initiator allows the PSU to be powered on without being plugged into the motherboard. The 24-pin bridge connector plug can operate and start any ATX/EPS power supply by itself. The jumper uses 1007 18AWG cables to ensure long-term reliability. Commonly used to assemble/test PC water cooling systems BTC miners test lights fans hard drives or power supplies themselves etc.