PC Shuts Down starting GPU stress test

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Sailing_Nut

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Hi, I have a PC that I put together from components lying around. Of importance is the PSU that is a 550w model that is space'ed out to supply 22A on the +12V rail for the PCIe GPU connection.

I am running an NVIDIA BTX 460 76MB card. When I start a particular 3D program (Zwift cycling simulator) or a GPU stress test, the PC shuts off immediately.

My research shows that the GTX 460 wants 22A on the +12V rail, so it seems I'm a bit on the edge. However I don't want to upgrade the PSU if that is not really the cause. My gut says it might not be the cause because (to the eye) the programs that cause the shutdown never even display anything. So, I'm concerned that the power requirements of the card have not really ramped up to the full 22A at the point the PC shuts down. But, an over current situation on the PSU would most likely exhibit the immediate shut down problem.

Can anyone suggest additional troubleshooting steps to be certain that it is the PSU not being up to the demands of the GPU?

TIA!
 
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ingtar33
glad it's sorted :D Generally i dislike telling people to buy new parts until every other possible cause has been explored (hence why all the tests).

But a bum psu was definitely in the cards.
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Sailing_Nut

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I'm not thinking this is heat related because it happens immediately after starting the stress test or other 3D application. I can run this for hours not pushing the GPU.
 
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ingtar33

ingtar33

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dude. listen. there are 3 parts that can overheat. motherboard/cpu, gpu and psu. typically your pc will shut down (black screen like someone pulled the plug) if something is overheating. Power issues usually show up with black screen REBOOTS. now is your computer turning off or rebooting?

 
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Sailing_Nut

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It is shutting down so from your description it would seem to be an overheating issue. Do you know of any good programs that will log temps of all 3 components so I can make a 100% determination that it is heat and not power related?
 
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ingtar33

ingtar33

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Dec 17, 2012
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Can't trust the thermometers in your system. the safest way to test would be to pop the side of your case off and stick a box fan in the opening and turn it on full blast. then see what happens when you run your stress test... if the problem goes away then you have a temp issue. If the problem doesn't go away (or change or get delayed) then the next most likely issue is the PSU is failing in some way.

that said, MSI Afterburner will give you temp reading for your gpu
HWMonitor will give you the temps of everything.

while it may seem like a no brainer just to get HWMonitor and skip MSI Afterburner, i suggest you get them both, as MSI Afterburner may possibly let us figure out what's going on if its NOT temps.
 
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Sailing_Nut

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Thanks for the reminder on MSI Afterburner and HWMonitor! I used those a few years ago when I was working to stabilize an overclock.

I'll also use the box fan method too and report back on the results.
 
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Sailing_Nut

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I got the time to run with the box open and a huge fan blowing on it at full speed. Same exact result. Just as the stress test is about to render it's first frame the PC shuts down.

I checked the log from MSI Afterburner and the GPU temperature is only at 29C when it shuts down. There is not even a 1 degree rise in temperature before the shutdown.

Here is the log from Afterburner. (I could not figure out how to make HWMonitor log periodically to a file.)

MSI Afterburner Log
 
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ingtar33

ingtar33

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Dec 17, 2012
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that looks like a gpu driver crash; since you're not getting blue screens i sorta dismissed driver issues, but that's about what i'd expect to see with one.

How about try to fresh install gpu drivers? first note what version your nvidia drivers are, then download DDU from here http://www.guru3d.com/files-details/display-driver-uninstaller-download.html; load your pc into safe mode and uninstall your nvidia drivers, reboot your pc, download the latest drivers and install them. give it a try. let me know if that helps

if it doesn't work, post what version of drivers you had (before you uninstalled them), and we'll go from there
 
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Sailing_Nut

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Thanks for all of your help and suggestions!
 
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