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Installed new GPU, computer now shuts down under heavy loads

I recently swapped my old GeForce 630 for the GTX 660. I immediately saw a massive performance increase when gaming. However, my computer now shuts down at random intervals. Whenever I play a graphically taxing game, within 10 minutes to an hour(it's inconsistent, even with the same game), the computer will suddenly shut down. When it shuts down, the screen goes black, and audio flickers in and out. After about 5 seconds, the computer shuts down, and then reboots itself. No errors ever show up before the shut down or after the reboot.

This only occurs with the GTX 660 installed. With my old 630, I could have two games open, along with an internet browser and music in the background, and nothing would occur. Now all it takes is one graphically intensive game. It does not shut down when playing less intensive games or applications. Would this be a problem with the CPU overheating, or a problem with the GPU itself?

My drivers are up to date. I have two hard drives. A 112 GB HDD, and a 1.81 TB SSD. It was a pre-built computer by ZT Systems. It is a ZT IntelCore i7-3770 3.40GHz Processor Desktop.
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  1. what's your PSU wattage?
  2. vagrantsoul said:
    what's your PSU wattage?


    I actually replaced the power supply because that was what I believed the issue was at first. The new supply's maximum load is 600W.
  3. sounds like a faulty psu since it's happenign during a peak pull on it... could be a video card error as well, but leaning more towards the psu, are you getting any nvidia errors on the reboot?
  4. vagrantsoul said:
    sounds like a faulty psu since it's happenign during a peak pull on it... could be a video card error as well, but leaning more towards the psu, are you getting any nvidia errors on the reboot?


    No error messages ever occur at any point during or after the reboot. It reboots as though I did it manually, nothing out of the ordinary.
  5. vagrantsoul said:


    That's extremely similar. I even bought the same brand PSU. Corsair CX600 with a 40A 12 volt rail. I suppose I'll have to start with replacing the replacement.
  6. Best answer
    see if the store will rma it for being faulty, might have to deal with the manufacturer, corsair is excellent with customer service usually
  7. vagrantsoul said:
    see if the store will rma it for being faulty, might have to deal with the manufacturer, corsair is excellent with customer service usually


    Thanks, already submitted a ticket. We'll see how this goes.
  8. good luck, hope things turn out for you
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