"You get what you pay for!" Is this maxim realy true? On the one hand there are more than enough expensive PSUs with high ripple and noise results with a noisy fan thrown in as well; on the other hand, you can't get the best capacitors without paying a premium. So let's see how three different 550W power supplies compare, particularly in light of their pricing. There's quite a spread here in terms of cost; how much PSU can you get for your dollar?

Although many users are currently looking for smaller power supplies below 500W, there still is a demand for stronger ones, particularly if you are a gamer with Triple-SLI or Quad-Crossfire systems. Those planning on running NVIDIA's next generation "Fermi" will want a fairly beefy PSU, and the same goes for Folding@Home farms where you'd want a lot of stable power. For the upper end PSUs there are a wide range of models, which doesn’t make the purchase decision easy. In addition, these power supplies are usually expensive so you'll want to get the best features and a reliable power supply that can operate even under maximum load and summer temperatures. The Antec TruePower Quattro 1200W aims to satisfy those requirements.