500w PSU too low for this specs?

My computer restarts itself after 1 hour of gameplay i thought it was my gpu that got to almost 90c but then after configuring it to be 70c still my computer restarts itself any ideas? maybe the PSU wattage is too low...

Intel Core i7 X980 3.33Ghz Processor
Gigabyte GA x58A UDR3
ATI Radeon HD 5870
Cooler Master HAF X Case 932
WD Caviar Black 1.5 TB
Cooler Master Stock PSU 500W
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More about 500w specs
  1. Best answer
    Try this PS calculator from Thermaltake and you will have an idea if your PSU will handle your system.
  2. i would say yeah your a little to low. 650 for that build would be a safer choice although its unlikely that that build will go over 440w all in which sounds ok but 1s you take cap ageing into account your 500w psu will likely only manage 400w stable after the first year.
  3. Best answer selected by irvinth.
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