New upgraded gaming PC, unexpectedly shut downs

Hi good evening,

I recently upgraded my Gaming PC to play Battlefield 4 smoothly. I am testing the system in a Sharp LED HDTV 46" 1080p. I tried LOW and High settings, in 720p and 1080p.

Intel i7 LGA 1156 860
Corsair H50 CPU Cooling
G.Skill Ripjaws 4GB (2x2GB)
XFX Radeon 5770
Thermaltake ToughPower 750W
Cheap Keyboard/Mice

SAME:Intel i7 LGA 1156 860

SAME:Corsair H50 CPU Cooling
Corsair Vengeance 8GB (4GBx2)
Gigabyte ATI R9 270 2GB (I know that this one is PCI Express 3.0)
SAME: Thermaltake Toughpower 750W
G19 Keyboard G700 Mice

Now when I am playing for example in Test Range on BF4, it lags (even in low settings), also on online servers. FSX runs good. BUT on BOTH games that I tried in about 20-70min the computer just shutdown by itself. I put the EVEREST Ultimate edition and none of the CPU or VGA sensors go over 50C. All other temperatures are kept normal usually 37C.

Why my computer shutdowns unexpectedly?

5 answers Last reply Best Answer
More about upgraded gaming unexpectedly shut downs
  1. you connected the parts on your own?
  2. yes I did, I have been doing this for 10 years now
  3. i had a problem when i built my pc with the memory timings (cas , latency etc.) and it was shutting down. I had to manually set them through BIOS. It took me a month to figure it out. But i guess you have already done it?
  4. Best answer
    troubleshoot your psu...most random shutdowns are caused by defective psu
  5. finally I realized that my 2yrs old PSU cannot handle the loads of new GPUs even that it is 750Watts.
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Corsair EVGA EVGA P55 FTW Battlefield 4 Intel i7 PCI Express 3.0 Thermaltake Toughpower Keyboards Gigabyte ATI Radeon 270 XFX PCI Express 2.0 Gaming Random Shutdown Graphics FSX Radeon 5770 Mice LGA 1156