*Review: Viperlair (
http://www.viperlair.com/reviews/cas.../index.shtml)*
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Power Supplies have been changing a lot in the past 2 or 3 years. At one time, there was little difference to distinguish one from another, but now we have differing colours, cooling configurations, LED lighting, some with fans and some without, some with modular cabling and some with standard fixed cabling; a very diverse item. Of course one thing that has continued to change is the power output. Gone are the days of the 250w PSU, and even a 500w PSU is a common item these days. When you consider the power draw of a HD 2900 XT, it's easy to see why a 600w, 700w even 800w is needed, especially if you're running crossfire or SLI.
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