PC rebooting while playing games

bryan1291

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Aug 4, 2011
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PC specs:
Core i7 920
Nvidia GTX 275
6GB DDR3 RAM
700 Watt PSU

Temperatures:
Idle

GPU ~ 50-54c (fan at 100%)
System ~45c
CPU ~39c
Core 0-4 ~44-48c

During gameplay

GPU max temperature ~80c (fan at 100%)
CPU upto ~60c



I've had this problem for a while, and I have thought it was temperature issues, but I'm not sure anymore. Last night I tried to play and within 30 minutes of play with GPU temp reaching only 75c my pc rebooted. I tried to play again and within 20mins I had a reboot with about the same temps.

I have tried cleaning my system many times, but the problem keeps on happening.
 

foverosiv

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Jul 18, 2011
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have you tried playing over games, and does it have the same problem?

try using the same PSU on another computer and see if you have the same problem, or use another PSU on this one.
 

bryan1291

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The PSU i have is :
http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story4&reid=109

apparently it's a piece of trash, but I want to be certain the PSU is the problem before I go out and buy a new one.

I was just playing World of warcraft for about 3hours during these 3 hours my pc shut down 3 times

@11:12pm first reset
@1:07am second reset
@1:51am third reset

During these resets my GPU was under 75c and CPU under 55c

Again it only shuts down when I play games, can it be a PSU issue?
 

bavman

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May 19, 2010
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Can you get a hold of a decent psu from a friend or something so you can see if thats the problem? Some cheaper brand psu, even though theyre rated at 700w can give out under load even at low loads like 400ish.
 

sandrockcstm

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Unfortunately I'd say you're at a point where you have to start doing process of elimination with your hardware components. There's definitely something going on with either your heat levels or electricity, and if the psu is rated poorly that's the first culprit you should test. Go to a local computer shop and ask what their return policy is. Explain your situation, and they might take pity on you and let you test a new PSU in your system at the shop.
 

bryan1291

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Tomorrow I will buy a new PSU, and run memtest, but the only thing that I'm still unsure of is that my PC shut off after 10 minutes or furmark and my GPU was at 105c, I mean It never gets that hot during games, but still.

Also unsure about my CPU getting to 90c from prime95 after 20ish minutes.
 

bavman

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Those are bad temps to hit. Do you get any indication as to why your computer has rebooted? Like when you log into windows after a bsod you get a box that says your computer recovered from an unexpected shutdown. That popup creates a dump file with information about what went wrong. If your psu is the culprit you wont get that. Usually when your overheating your BIOS will tell you on bootup. If memory is unstable or CPU is then you will bsod and you'll get the message on next bootup
 

bryan1291

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I never get a bsod , It just reboots and when I boot it back it It tells me I think that the system did no shut off properly If i want to boot in safe mode or regular, but no BSOD.
 

bavman

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One thing you could check is output voltages on your psu. Download and install speedfan on your computer and check the 12v, 5v, and 3.3v reported voltages. It shouldnt be more than +/-10% off. I'm not too sure how accurate speedfan is.

If you have a multimeter and feel probing your mobo and psu, you can check it manually:
http://www.lockergnome.com/it/2005/03/02/learn-how-to-diagnose-power-supply-problems/
 

bryan1291

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30mins no reset and the temperature difference is amazing while playing GPU ~55c and CPU 37c, no resets yet and in zones where my gpu used to be 85c is now 55c.

THANK YOU ALL!!!!!