PC keeps suddenly turning itself off completely

Koushick Talukdar

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Oct 31, 2014
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Hi folks,

Recently, my PC keeps shutting itself off. This mainly happens when I am playing games but it can happen during normal browsing. I took it to my local computer repair shop and asked them to diagnose the problem since I didn't have time to spare to do this myself at the time. The guy came to the conclusion that it was my graphics card that was causing the problem and its gone faulty. I replaced my graphics card since then, however I'm still getting them same problem. Obviously, my money was wasted.

I did some CPU stress testing and using CoreTemp and IntelBurn test. These are my min max temps (degrees Celsius):


Core 0 Min 38 Max 86
Core 1 Min 36 Max 84
Core 2 Min 38 Max 82
Core 3 Min 80 Max 81

I did the stress testing until the PC shut itself off again. This suggests to me that the CPU temps are the problem here and is the cause of them problem.

What does everyone else think? What is the cheapest solution in this case? I've already cleaned dust out of my PC as much as I can. And also my PC is situated inside my desk's compartment below and I close the door on it., there really isn't any other place I can put my PC on its a small desk and a small room.

I am using Intel 4670K processor although I did not bother overclocking it, right now I replaced my old GPU with alternative one - GTX 960 Nvidia. And I am using a 600W EVGA power supply. I have had this PC for roughly 3-4 years now.

I'll be grateful for any suggestions. Thanks in advance :)
 

JalYt_Justin

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Any PSU of decent quality between 550-700W should be good for that system. If I had a recommendation, I'd say the Corsair TX650M. It's a good quality power supply that's quiet with 80+ Gold efficiency for a decent price. Nearly all SeaSonic PSUs are really good too.

Your PC will likely not thermal shutdown until about 95C. Really your temps are past what I'd want on my CPU, as getting to 80+C is quite toasty for a CPU. It's not dangerously high, but definitely getting there. But it won't thermal shutdown, and it's pretty hard to get CPUs to actually thermal shutdown in general, they usually throttle hard before they get to that point.
 

Koushick Talukdar

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Oct 31, 2014
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Thank you for your informative answer. The model you have suggested doesn't seem to be available in the UK. I'm opting to purchase the Corsair RM650x:

I'm still very concerned about my CPU temps though. I have not applied thermal paste in a long time. Perhaps its time to apply a fresh coat?

I'll purchause a PSU soon and come back to verify if that actually solved the problem.

Many Thanks

Koushick
 

JalYt_Justin

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Sure, it would be worth putting new thermal paste on. If you take off your cooler and notice that it's dry and cracked, definitely time for a new round of paste. I recommend Arctic MX-4. What is your CPU cooler in particular? Some coolers aren't made for higher TDP CPUs and it could just be that it's not strong enough of a cooler to handle it under full load.
 

agello24

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keep an eye on your corsaid psu. i currently own a 750m. i had to rma it about a yr and a half ago. it went out 2 weeks after purchasing it. the replacement has been working without a skip.
 

Koushick Talukdar

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So I bought the new Corsair power supply, as well as a cooler master hyper cpu cooler and a new case because my old one was in bad shape anyway. However , when I stress test in Valley benchmark it still turns off without warning. I even reset my pc back to factory settings just in case it was a software problem. Not sure what to do now, any advice ?