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Old 09-27-2008
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jonnyGURU jonnyGURU is offline
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Your biggest drawback is going to be cable clutter.

You won't have added heat because one PSU @ 80% efficiency putting out 500W is giving off 100W of heat. Two PSU's @ 80% efficiency putting out about 250W each is giving off 50W of heat each.

But I can imagine funky things happening if one PSU were to stop working. I guess you should make sure one PSU powers just the graphics cards because if you lose power on those connectors, you'll know without damaging anything. Not sure how you'll handle the minimum load requirements of the other rails though. Resistors?
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