my pc is shutting down in games even after getting a new heatsink

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vortex_nations

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a few weeks ago i bought a cooler master hyper tx3 evo and some Arctic mx-4 thermal paste in order to reduce the temperature of my scorching hot AMD a8-6600k. This caused a small drop in heat so that I can now idle at around 45 degrees instead of the 70 it was at before. however even after doing this my pc continued to shut down after half an hour or so of playing certain games. my peripherals flash on and off afterwards and the CPU and GPU fans continue to run as well as the power button and fan lights. i have tried under-clocking my APU to 3.6 GHz however it still has the same issues. i have also noticed that my voltages and core frequency for my APU constantly fluctuate, with the frequency shooting between 1.8 GHz and sometimes even over the 3.6 GHz I had set.

Thank you in advance for any replies
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Processor: AMD a8-6600k
GPU: MSI GTX 660 OC edition
Motherboard:ms-7721
CPU cooler: Hyper tx3 evo
Thermal paste: acrtic mx-4
 
Solution
10tacle
What power supply are you using? Do you have a spare one laying around or can you borrow one from someone so you can swap it out and see if that one works fine? It could be many things: but with voltage spikes it may be a motherboard going bad or a bad power supply. I've had similar symptoms in two older rigs, and one turned out to be a motherboard with failing capacitors and the other a failing power supply. Very hard to diagnose without trying different components and swapping them out one by one.

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10tacle

10tacle

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What power supply are you using? Do you have a spare one laying around or can you borrow one from someone so you can swap it out and see if that one works fine? It could be many things: but with voltage spikes it may be a motherboard going bad or a bad power supply. I've had similar symptoms in two older rigs, and one turned out to be a motherboard with failing capacitors and the other a failing power supply. Very hard to diagnose without trying different components and swapping them out one by one.

 
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vortex_nations

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unfortunately I don't currently have a spare power supply. nor can I confirm the brand of my current one. i am using the standard 500w psu that came with my pc. something that may be worth noting is that the shut-downs started to happen after i had installed my gpu, the pc i bought came just with the motherboard,psu and apu. i have only had the pc for around 1-2 years so i think the psu could be the cause rarther than the motherboard, i dont have alot of money to replace it though. are there any budget ones you could recomend?

thank you very much for your very fast reply

Update:
i have recently been looking through manuals to try to find the source of the problem, it seems that my GPU requests a 550 watt PSU when the one I have is only 500w, could this be causing the problem?
 
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10tacle

10tacle

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Sorry I never got a notification you had replied. That PS should be fine with a GTX 660 if it is a decent quality one. Keyword: IF it is a decent quality one. Your card uses 150W maximum or so and unless you have a lot of internal drives running and overclock your CPU, you shouldn't be coming close to maxing out the power supply. However cheaper/failing power supplies may cause these symptoms as well. Not sure where you live, but if you have a retail store nearby that allows easy hardware returns, pick up a Corsair or EVGA 500W and see if that fixes the problem. If not, then take the PS back and you've narrowed down one thing.
 
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vortex_nations

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the power supply i am using looks exdingly cheap and low quality, and to be honest i don't trust it.unfortunately I don't have anywhere for easy returns to test a different power supply, instead i have ordered an xfx proseries 650W psu and im gonna hope for the best.It will help me out later on anyway. ive been asking around multiple hardware shops for advice and they all seem to think it is a problem with the psu.The problem has gotten worse with the more hardware i have put in, so to me that says that the psu cant supply everything with enough power (im kinda new to pc stuff so im not quite sure ). another thing that may be worth noting is that the pc runs perfectly fine untill the system is under heavier load and the fans start to speed up.

thanks again for your support.
 
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vortex_nations

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Feb 3, 2015
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i am pleased to announce that the problem has been resolved. the new psu did the trick. the old one had melted one of the peripheral connectors leading to my GPU. however my APU is still experiancing some heat issues (idleing at 45 and maximum at 82). any suggestions would be very helpful.

thank you for your kind help and support throughout this issue.
regards
vortex_nations
 
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10tacle

10tacle

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That's great news on the PS! Unfortunately I'm an Intel guy and am not familiar with AMD processors, but even I know that is on the warm side by at least 10C, especially if you are not overclocking. With that said, check to make sure your heat sink is completely secured down as tight as it can go. Also make sure the thermal paste is spread evenly and not too thick (very thin layer that is almost transparent). There are arguments out there of the best way to spread paste...some say drop a half pea-sized amount in the middle of the chip and let the heat sink from the cooler spread it out as it gets screwed down. Others say spread it out thinly with a putty knife before attaching the cooler heat sink.

Try removing your cooler, cleaning off the bottom and the processor of all traces of thermal paste (hopefully it's of decent quality like Arctic Silver), then re-apply fresh paste and re-attach and get it as tight as you can safely. Also check to make sure your cooling fan is spinning at speed and it is installed in the correct direction of airflow (I've been there, done that!). You might need to take this to an AMD specialist forum. Good luck and glad you at least found your power problem!

 
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vortex_nations

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The system seems to be running absoloutly fine at the moment, with its highest temps reaching 70. apparently cpu sensors for amd chips are quite a bit off so it may well be cooler. i have managed to play a gtood 2 hours of heavy gaming without any sighns of throttleing or overheating so i would say that all of my problems have been resolvedl.i might try reapplying my thermal paste later on though.
thanks again for all of your kind help support, i wouldnt have managed without your support
 
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vortex_nations

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Feb 3, 2015
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4,510
The system seems to be running absoloutly fine at the moment, with its highest temps reaching 70. apparently cpu sensors for amd chips are quite a bit off so it may well be cooler. i have managed to play a gtood 2 hours of heavy gaming without any sighns of throttleing or overheating so i would say that all of my problems have been resolvedl.i might try reapplying my thermal paste later on though.
thanks again for all of your kind help support, i wouldnt have managed without your support
 
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