Help with a strange issue.

Qitarah

Qitarah

Qitarah

Associate
Joined
25 Nov 2011
Posts
1,394
Hi,

Got an issue with my girlfriend PC that is confusing me and wondering what you guys think.

4670k (Not over clocked).
Asus z87-pro
Sapphire tri-X 390
8 Gb Gskill 2100mhz ram
Xfx 650w xtr PSU.

The PC randomly turns off and restarts when under stress (in games, benchmarks and stress tests). Not a blue screen, just straight turns off and turns back on again.

I tried all the basics (different socket, cable, checked CPU & GPU temps and checked if every cable was seated properly). CPU temps are pretty high (stock cooler) but it is still within normal operating ranges - 60-80c depending on the application/stress test. Every other temperature I noted was fine (including gpu vrms). Tried defaulting bios and they are up to date. Nothing has changed within the last month that this has started p, but it's been getting progressively worse.

Luckily everything had literally one day of warranty left on it, so it's at the PC shop. They said they changed PSU and it still does the same, and they think the issue is most likely An overheating CPU (I'm really not convinced, their engineer told me the highest he saw was 86c during prime, which isn't that abnormal).

What else could cause a computer to turn off and restart instantly when under stress? Motherboard VRMs maybe?

Any help would be great,

Thanks.
 
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what PSU have they fitted?
My old system was doing the random restart and it was the PSU that was at fault.

It could be the VRM's on the motherboard getting hot but as your not overclocking or using an AIO I would be surprised if there getting that hot.
how is the case for airflow?
 
I was super sure (like 95% sure) it was the PSU, I told the guys at the shop and the engineer as much. They said they tested with a 750w XFX and it still did the same thing.


Case airflow is not amazing but not bad either. It's a noise dampened case so isn't ideal still, it has two intakes and two exhausts (+PSU intake). Even then I've tested with the case open and it still does the same.
 
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I know they said they changed the psu.. but I would deffo point at the psu at its limit.. I has this issue .. new psu fixed it for me.. it was just like some had pulled out the power lead in my case.
 
joedeath332 said:
I know they said they changed the psu.. but I would deffo point at the psu at its limit.. I has this issue .. new psu fixed it for me.. it was just like some had pulled out the power lead in my case.
Click to expand...

I was the same with my old FX8350 set up. it would just shutdown and restart anytime I tried to do anything stressful. quick trip to a local high street shop dropped in a new PSU and the problem had vanished.

at the time I bought a CX750M which carried over to my i5 4690k build but have read they arent that great so just dropped in a new XFX XTR 750 from overclockers
 
Event viewer was just some non description error code, tried googling but nothing specific. As mentioned it just literally turns off and restarts straight away, no blue screen of any kind.

Gonna probably buy some cheapish heatsink&fan for it, let them install it and see if it really is the issue. Not like £15 is really that a big of a deal and the stock coolers are really junk. If it still is crashing it's obviously gonna be a PSU or mobo issue.

Thank you all for your relies, I appreciate it.
 
I was wondering earlier.. have they tried new Ram sticks? it could be a bad stick of ram
or is the xmp setting set? I had a little bit of grief when that was set on mine.
 
Small update.

The shop was convinced it was overheating issues, we replaced the heatsink and dropped the temps a bunch (admittedly they were quite high but again nothing catastrophic that is for sure).

Brought PC back, everything worked fine for a while, no crashes when gaming or stress testing.

Fast forward 24 hours and its crashing again (as in instantly turning off then restarting itself), same situation as before when any significant stress is placed on the GPU (like furmark, and in games). I can stress the CPU and ram with linpack and no crash.

VRMS and core temps are fine on the GPU.
Tried moving ram around different slots & trying one stick.
Tried resetting gpu
Updating / rolling back drivers,

Even tried under clocking gpu (adding solve problem just decreased the frequency that it happens).


Zzzz how annoying. I'm guessing Either PSU or motherboard. Highly doubt it's the gpu itself.
 
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