PC Shuts down while playing high end games


My PC shuts down during a game play at 1080p resolution. I bought the PC primarily for playing high end games such as Battlefield 3 or higher versions, FSX and GTA IV.. etc. But whenever i start the game at the higher resolution, PC shuts down within 15-20 mins

Here are my Specs:
Motherboard: MSI 890GMX G65
CPU; AMD Phenom 2 X4 955
RAM: kingston 8GB DDR2
GPU: AMD Radeon HD 6850
PSU: Cooler Master Silent Pro M2 850 Watts
Operating system: Windows 7 Ultimate x64

Any suggestions or solution can you please provide? Or if i do have to change the configuration what do you suggest?
2 answers Last reply Best Answer
More about shuts playing high end games
  1. probably overheat
  2. Best answer
    The two most likely possibilities are overheating and problem with the power supply.

    For overheating:
    Download HWMonitor and check the temperatures while playing games, you should be worried if the temperatures go over 65 degrees Celsius

    For power supply:
    You can try testing to see if the power supply is faulty with a multimeter.
    If it isn't faulty, it could be not enough power, in which case, you would need to get a better power supply.

    I would test overheating first, then faulty power supply. If both of those check out, then I would consider trying new PSUs.
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