While the ThermalTake ToughPower 550W may not be the most powerful PSU out on the market right now, that is not it’s purpose.  The idea behind this PSU is to provide stable power, with the least variation on the lines possible.  Read the review at Bjorn3D to see how well it does it’s job.
“Today, I’m looking at Thermaltake’s yet to be available ToughPower 550W power supply. You might ask what’s the big deal? Let’s say you already have a PurePower / PowerStation ~500W model. While the amount of Watts may be enough, your new components may require more stable voltages and higher amperage (strength of an electrical current). As the name implies, ToughPower is all about stability.”

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