Review: Hothardware
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As Computer Enthusiasts, we all love to see PC components get more and more powerful. Unfortunately, with this increasing power often comes an increase in power demands. This is especially true of video cards. In fact, it can be reasonably argued that if it weren't for the high-end video card market, power supplies probably wouldn't be anywhere near the 600W or more that we see in typical enthusiast-level PSUs these days.
When you begin to crave high-end dual or quad GPU configurations, you must realize that a high quality and high capacity power supply is probably in your future. Fortunately, both NVIDIA and ATI make your search for an acceptable PSU a little easier as both companies have certification programs to verify if a PSU is suitable for multiple video cards.