With the power supply being one of the most important parts of a computer, you cannot afford to install a damaged or defective unit. Corrupted data, blue screens of death, and even severe system damage can result from incorrect power being supplied to your computer. The Power Supply Tester allows you to check the power from your 20pin or 24pin motherboard, 8pin, 6pin, 4pin and SATA connections. See the voltages your power supply is producing and check each of its connectors with the best power supply tester on the market. The EZ Power Supply Tester with LCD displays each voltage on the clear blue back-light display.