This 20/24 Pin ATX Power Supply Tester offers a convenient way to check this power supply functions on hand, to save time and possible expense. The ATX Power supply tester offers a built-in 25W 5.4ohm load to generate steady outputs, +5V, +3.3V and 12V leads for volt metering, making output voltages easy to check. With straightforward LED indication to let you know your Power Supply is functioning properly, the ATX power supply tester offers the perfect solution for saving time and ensuring system stability.