Some have had issues with Antec power supplies but I've had no
problems at all. The don't run 24/7, only when being used. II have 3
Earthwatts units that auto switch 120/240 and claim high efficiency.
Quad core Phenom II with 2 HDD normally run 110 Watts checked with a
Kill-a-Watt. I recommend them.

I have an Antec EA380 running 24/7 without air conditioning. No problem
so far....

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May the Force & farces be with you!