Tom's Hardware tested five PSUs, including the CoolerMaster Real Power RS-550-ACLY,
Enermax Liberty ELT500AWT, Hiper Type R 580W, Silverstone Zeus ST56ZF and Silverstone Strider ST56F.
Our live stress tests last year served to weed out which PSUs were good for the electronic waste dump and which units merited a closer look. The drop-out rate of 32% also demonstrated that the underlying quality of power supplies isn't as great as many vendors would like us to believe. The manufacturers of the drop out units went back to the drawing board to make improvements, and sent us new models for consideration. You can read here about how the final version of the CoolerMaster Real Power 550 and the new Hiper Type R fared in our tests, along with information about some new models from other vendors as well.