When I first began repairing computers, power supply units caused me the most problems. When a PSU begins to fail, or is faulty out of the box, it is sometimes difficult to determine because the symptoms are similar to other faulty hardware components. One of the best investments I ever made was the PSU tester; until now. CaseBuy now offers a digital LCD display on the EZ Power Supply Tester III. Benchmark Reviews shows you just how important this tool is, and why every technician, overclocker, enthusiast, and even gamers could benefit.