ATX 2.0 Ultimate LCD Power Supply Tester (20/24 pin ATX, SATA, P4, Xeon, PCI-E, Floppy, 4 pin)

Featuring a backlit, bright blue LCD display - our power supply tester can verify that every part of your power supply is operational. It gives voltage read-outs and beeps if there is a problem. It even works with 20-pin power supplies (though it will complain about missing second 12 volt rail).