System Crashing under CPU & GPU Load

[muzz it]

Hello LTT Community.

 

I am trying to solve a stability issues a friend is having with his computer.

 

The issue only appears when running full load GPU and CPU stress tests at the same time, I thought the issue was a unstable overclock, however its having the same issue at stock setting.

 

The system is

CPU: i7 3770k @ 4.5 GHz 1.20v

Motherboard: Gigabyte Z77X-D3H

Memory: Corsair Vengeance Low Profile @ 1600 Mhz 9-9-9-24

Primary Graphics Card: Sapphire R9-280x

Second Graphics Card: Gigabyte 7970OC Edition

Power Supply: FSP Aurum 1000w Pro

CPU Cooler: Cooler Master Seidon 120XL Water Cooler.

Boot Drive: Samsung 840 EVO 120GB SSD

 

For the stress test we are running Valley Benchmark in 1920x1080, 8x MSAA, Ultra qualtiy Windowed (so we can see other programs as well) along with OCCT CPU stress test (4 threads to max out GPU and CPU)

We are also running MSI afterburner to track the GPU usage

 

 

Best we have managed is around 1 Hour 15 mins before OCCT says error detected in core etc (so far all 4 cores have had the error).

 

CPU Temps are maxing out in the high 70's (peaking around 78 - 79) so its not a temperature issue.

 

Now the weird part...

 

if we stress the CPU at 100% by its self it has run 12 hours + with no issues.

If we stress the GPU's at 100% by them self if has run 12 hours + with no issues.

 

The issue only appears when running both the CPU and the GPU at 100% at the same time.

 

We have also had some crashing in BF4, Crysis 3 and Assassin's creed 4 after more than 1 hour of continuous game play.

If we pay BF4 for 40 mins then switch to Assassin's creed 4 it ill easily run for another 40 + mins with out issue.

 

We have also ran memtest for 4 hours with no errors as I did suspect a memory error.

 

Any help would be greatly appreciated

Thanks

 

Muzz.

[AidenNeill]

mine crashes if i overclock it above 4.2 and i have a 4770k and temps aren't a problem etc but it goes to a blue screen with writing on it when i stat playing a game then shuts down...weird

 

god knows what it is 

[kizoku_95]

Is the PSU trustworthy???

[brob]

Do you have an overclock on the gpu?

[Guest Generallee]

I would say the PSU is failing, never heard of that brand before.

[brob]

Unlikely it's the psu. FSP is a major manufacturer of psu and the Aurum Pro 1000W unit has been quite well reviewed.

[muzz it]

Do you have an overclock on the gpu?

No over clock on the GPU's they are stock.

 

I would say the PSU is failing, never heard of that brand before.

 

Is the PSU trustworthy???

 

FSP Aurum 1000w is a Modular 80 plus Gold power supply, they have gotten pretty good reviews. Also less than 6 months old.

[Guest Generallee]

Reduce your OC on the CPU and see if it's more stable

[s3ns3]

I would say the PSU is failing, never heard of that brand before.

wow FSP is a manufacturer. its a very good brand and most of the psu out there are FSP inside

[Guest Generallee]

wow FSP is a manufacturer. its a very good brand and most of the psu out there are FSP inside

 

My bad   just used to Seasonic based PSU's, but good to know 

[brob]

Has this behavior always been present in the system?

[LogicalDrm]

That sounds like power delivery problem. Have you connected all power cables to mobo? Maybe its mobo that can't deliver power that PSU is feeding.

[muzz it]

That sounds like power delivery problem. Have you connected all power cables to mobo? Maybe its mobo that can't deliver power that PSU is feeding.

That looks like the issue, the power delivery section of the motherboard was getting very hot (60deg+ in some places) we jerry rigged a fan to blow air on the back of the board to get the temps more even and its ran for 7hours 30mins 100% cpu and gpu now with no issues.

So i think the issue is not enough airflow over the power modules by the cpu.

We are running the test now with the fan on the back of the motherboard removed to see how long it takes to crash now.

Sorry if this post is bad im posting from my lg g2

[muzz it]

For an update we have had the system running stable for a day or so now.

It was a power delivery / heat issue due to the vrm on the motherboard getting too hot. 

 

We are in the process of sourcing a better case to give us more airflow as the one we were using has no airflow over the top of the motherboard and no top exhaust so the hot air up there just sits there.

 

Thanks for everyone for there help and input