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GPU's degrading?

post #1 of 17
Thread Starter 
Over the last week I've been folding like crazy and today my rig just shut off instantly and rebooted. No warning, nothing whatsoever, just a "kernel power" error in the eventlog.
It apparently happens when my GPU's are clocked at 880Mhz core & 1.088V. It takes about a few minutes folding and then it suddenly shuts off.
At 850Mhz & 1.088V things are running since 50 minutes without any errors so far. GPU temperatures are in the 75-80°C range and have always been that way.

I've had similar symptoms on another PSU that was dying last year so I added more tests. It is now folding at 850Mhz & 1.088V. 10 Minutes ago I added about 170W worth of halogen bulbs attached to various 12V molex plugs. Its still going strong so I'd guess this rules out the PSU but I'd like to have more opinions.
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post #2 of 17
Have you dropped any screws recently?
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post #3 of 17
As an example my HD 5970 was running at 1.162v @ 925 vcore and 1200 memory with my last build and I had to lower it to 900 vcore and 1100 memory on my new build. Was it the GPU degrading or was it the new components (PCI-e slot/mobo/PSU) affecting the changes?
 
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post #4 of 17
Also stable folding and stable gaming are two different things entirely. Stable for folding may be higher than stable for gaming. I can crank my 7970 up to 1230 for BOINC, but cannot go past about 1150 for gaming. Most of the time I game on stock. With the FPS I get there's no need atm.
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post #5 of 17
Thread Starter 
Hmm, I don't think there are any stray screws in there. I may have dropped one or two on the top GPU while no power was attached though when building.

So far this 880Mhz was pretty much stable for months even in gaming. It was loud as hell but the FPS were good so I ran the cards at that setting. Last weekend we had another Borderlands2 session for hours and more hours and yet more hours. Nothing bad happened so yeah, it was as stable as it gets.
The problems seemingly started during this night, can't remember anything bad before.

Some weeks ago I built a custom loop for the CPU but even since then things were stable. It's still folding with the extra lamps attached btw. No errors in the folding log so far.

It's kinda weird though. I'd have expected the software to fail if things became unstable and not the whole rig to go *click* power out all of a sudden. Sometimes Precision forgets to set the VCore and then the driver just fails and reverts to defaults. It doesn't even crash a game, just black screens for a second and comes back. This here is totally different and looks kinda scary.
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post #6 of 17
I had this problem before when I was folding like crazy. I determined the psu was degrading. I was running a 1050 corsair then switched back to my 850. No more random shutdowns. I haven't folded since because of this but gaming is fine. BTW I folded for a solid 8 months or so.
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post #7 of 17
Thread Starter 
For a solid 8 months... I guess they'd ship our power bill in boxes instead of envelopes then and not even the solar panels on the roof would save me. eek.gif

But yeah, my former Antec PSU was dying this way. It just couldn't sustain the load anymore and broke down more frequently over the course of a few weeks, hence the test with the added load that should be way more than the added load of a 30Mhz clock increase per GPU. I wouldn't suspect a Seasonic X-1250 to just crap out on me after 9 months but you never know...

Also my former 280 GTX really degraded somehow. At some point it just didn't want to OC all that much anymore and slowly got worse. Its running on stock in my former rig that my mom now uses for office stuff. The machine didn't shut off hard, rather got unstable. I've pretty much seen both camps sort of but more input from other people never hurts smile.gif
Edited by mosi - 10/3/12 at 4:03am
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post #8 of 17
I think it's the power supply still.

If it was gpus, the driver would recover or the computer would just freeze.

Not enough power to the components, then the computer would shut down under a heavy load.
    
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post #9 of 17
I think I can answer this... You see, when your running a PC for that length of time, errors are more likely to be prominent. However, with that said it's not unusual for fluctuations in power to cause random shut-downs. This is where component quality comes into play, for example - the mosfets and coils associated with power delivery to the CPU require very strict limits to reliable power delivery. However sometimes errors or over/under fluctuations will occur that cause the system to shut down.
To note, as previously stated, if a PSU is degrading (which it will) its power delivery will become less reliable and there may be times where it doesn't provide enough juice in that instant.
So it could be the result of a multitude of issues. PSU, mosfets, coils, poor quality, under-powered...
Also, I wouldn't run a GPU at 80c for sustained periods of time, poor silicon :'(
However if it was the card itself, as said already, it would just driver recover.
If your hardware is pushing the PSU wattage then fluctuations that cause the power draw to over-volt the PSU may cause it too fail.
So make sure you have sufficient watts with a little headroom for your PC.
Hope this helped.
G
post #10 of 17
Thread Starter 
Quote:
Originally Posted by GreenNeon View Post

I think I can answer this... You see, when your running a PC for that length of time, errors are more likely to be prominent.
Agreed, the process seems to only happen when folding so far, not while gaming. Maybe I should try a Demo loop of 3DMark, that one also stresses out the GPU's pretty much. The PSU has about 33% headroom at full load according to specs, if everything still was within spec that is.

So far no pinpointing but it's still happening. Over the weekend it also happened when folding on 850Mhz @ 1.06V so maybe it's slowly getting worse. As weird as it sounds, I'd be pretty happy if the component in question just gave up and died so the search would end right then and there. Today it also happened with the CPU running stock settings. that kind of rules out the CPU I think.

Maybe I just have to be patient but if anyone has any idea what I could try to find the culprit or make it die faster without too much fallout, I'm all ears!
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