PC jittery / crashing temporarily when under heavy load

Neirid

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Dec 27, 2015
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Hi all,

Recently my PC had started crashing temporarily when under heavy load (~5 minutes into a game), the screen won't refresh, keyboard / mouse input won't be registered and the last .1ms of sound that was being played will repeat. After a few seconds, the screen will refresh and some input will be registered but the problem persists until the game is stopped, where everything is mostly fine. I've found this happens very occasionally as well when watching videos, but the crash will only be very quick.

Temperatures when it crashes are around 68c for the CPU and 60c for the Graphics card, which rest at around 25c and 45c respectively, not ideal but acceptable as far as I can tell.

I'm under the impression that it's my graphics card, I've completely removed and re-installed the drivers which has only made the 'crash' occur a bit later than usual. No changes have been made to my computer (that I know of) in the last 4 days as I've been away, and everything worked absolutely fine before this. Would anyone know if there's been an AMD driver / windows update that I didn't notice which might have caused this?

From what I can tell, the voltage from the PSU isn't dropping outside of acceptable ranges, there aren't any processes sucking up any resources apart from the game and Virus, Malware and Spyware scans have all turned up with nothing.

Could anyone help me find the source of the problem? I'd like to avoid buying a replacement graphics card on a hunch. My current specs are below:

CPU: AMD FX-6100 (6 core, 3.3Ghz)
GPU: Sapphire AMD R9 270x 4Gb
PSU: Powercool Modular 750W
RAM: 8Gb Corsair xms3
MB: Gigabyte GA990XA-UD3

Thanks in advance
 
Solution
Yep, that is thermal throttling. FX processors can be damaged if run over 70C so if you have been having this issue for awhile you may have caused damage to your processor, impossible to know until you get better cooling. A good thing to do right now would be to clean out your case of any debris and dust, clean out your heat sink and cooling fans and reapply your thermal compound (may have dried out). You may find that after a good cleaning and reapplying your thermal compound that your temps are back under control.
What program are you using to monitor your CPU temperature? HWmonitor and programs like it can report false temperatures with FX processors. AMD Overdrive is the only program that will measure the actual real temp of your processor. Load AMD Overdrive and see what your temps are doing. FX processors have a thermal max of 70C if you are hitting 68C you may have spikes that are above 70C and what you are experiencing is thermal throttling. You will need better cooling for your CPU (I assume your still on stock cooling).
 

Neirid

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Dec 27, 2015
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4,510


One of the CPU temperature pins in Overdrive hits 72c after a while, which is roughly when the throttling starts, but this continued even when the temperature went back under 70 and only stopped when the game crashed to desktop.
I'm not using a stock fan / heatsink, I'm using a fairly large air tower cooler. I'll have a look into better cooling options, though. Always wanted an excuse to invest in a closed loop CPU cooler.

Would the thermal throttling also explain the mini-crashes I'm getting occasionally when watching videos? It's the same symptoms as when I'm playing a game, but much less common and a lot shorter.
 
Yep, that is thermal throttling. FX processors can be damaged if run over 70C so if you have been having this issue for awhile you may have caused damage to your processor, impossible to know until you get better cooling. A good thing to do right now would be to clean out your case of any debris and dust, clean out your heat sink and cooling fans and reapply your thermal compound (may have dried out). You may find that after a good cleaning and reapplying your thermal compound that your temps are back under control.
 
Solution

Neirid

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Dec 27, 2015
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4,510


I assume the thermal throttling would apply to the GPU as well?
I'll have a proper clean out as soon as I can and report back. It's not overly dusty in there, but I'm sure I'm about to be proven wrong.

Thanks for your help so far!
 


I doubt it, I would say that only your CPU is experiencing thermal throttling. Sapphire is very good at putting very effective cooling on their GPUs. I would say that your GPUs temps are fine (unless you have a big overclock on your GPU), its your CPU that is thermal throttling and causing crashing.
 

Neirid

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Dec 27, 2015
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4,510
Yup, cleaned and re-applied the thermal paste on the CPU and it's much more stable now. Not sure how that could have happened in the four days I was gone, but that'll probably stay a mystery.

Thank-you very much!