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Originally Posted by Dragonlich
The Nvidia claim of needing 450 Watt PSUs with their new cards is usually bullocks. You'd need a 450 Watt *crappy* PSU to run their cards, or a 300/350 Watt *good* PSU.
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Roger that! Anytime ya hear PSU wattage recommendations, it's concerning shitcan PSUs (RAIDMAX, POWMAX, etc.). A 300-350w good PSU is the same as a 500w+ crappy PSU. A good way to tell how good a PSU is how heavy it is...this sounds amateurish, but it's the truth. Better PSU's have more heatsinks and more voltage rails which ends up meaning a heavier weight. You can tell how good the PSUs are at Best Buy by picking them all up and feeling how heavy they are. Some of them feel like a couple of wires inside an aluminum casing while others feel like a brick encased in aluminum.
For the average user, a POWMAX or RAIDMAX PSU will do fine (until it inevitably blows). I've had two or three blow out on me, and I only have 1 hard drive. If ya wanna go quality, get a good PSU at 300-350w. If you have lots of hard drives, get a 400w quality PSU. Further than that is a waste unless you're running some massive terabyte server.
-Lasereth