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Computer Powers off unexpectedly

Just installed new power supply as previously seemed to have died.

i3 core
ASRock P55 Extreme LGA 1156
CORSAIR|CMPSU-650TX 650W RT

The computer completely cuts off without notice after about 10 mins. Is this a bad power supply or bad install (user error?).
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  1. Best answer
    Corsair PSUs are good and reliable. I would look for the problem elsewhere.

    1. Are the 24-pins and the 8-pins power connectors plugged in and well mated?
    2. Do you have a good power outlet strip? Plug in the computer directly to the wall outlet to verify.
    3. Is the heatsink installed well? No overtemp on the CPU? Check this with RealTemp. (If the CPU heats up beyond the design specs, it will shut off as a protective measure).
  2. Best answer selected by direrage.
  3. Thank you!
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