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Prime95 Instant Shutdown

post #1 of 27
Thread Starter 
Hey all, I just finished my new build and I'm running into some stability problems. I threw it together and it's been working great for a week or so, and I decided to download Prime95 just to check everything was okay.

As soon as I start a small FFT or blend test, the computer resets with no BSOD. I don't believe it's my power supply so I'm trying to look elsewhere before narrowing it to that...

i7 4790K
Gigabyte Z97MX-Gaming 5
4x8GB DDR3 2400mhz
Visiontek 7970
Seasonic X650

I've tried fooling around with a few settings in the bios on this board (while always returning to stock after) to no avail. I tried boosting the CPU voltage thinking it might be too low, and I also tried boosting the memory voltage since I thought that might be the issue. I have no desire to overclock this rig, but I really just want it running stably from here on out. It's been a long time since I've built a decent rig, so I'd appreciate any help and direction at this point.

Thanks guys!
Edited by xDriftyy - 9/16/14 at 5:46pm
post #2 of 27
I actually just put together a 4970k build myself. For some reason P95 gives HUGE temperature readings (95+). Only happens with P95 though, not any other stress programs like AIDA or OCCT.

Might be that it's getting too hot and resetting.
post #3 of 27
Thread Starter 
Quote:
Originally Posted by The Prodigy View Post

I actually just put together a 4970k build myself. For some reason P95 gives HUGE temperature readings (95+). Only happens with P95 though, not any other stress programs like AIDA or OCCT.

Might be that it's getting too hot and resetting.

It's not fast enough to generate temperatures. It's within half a second of clicking the button to start testing.
post #4 of 27
Thats same with mine, a second or 2 after starting the workload, its jumps from ~30C to 95C. Doesn't reset though, try running OCCT or even Intel burn test. Can at least try and rule out some variables. thumb.gif
post #5 of 27
Different stress tests leads to different temperatures. Try x264 or P95 1366k/1366k instead to stress, both stresses (is this even a word? haha) the CPU, and both runs AVX(2) instructions as well while being cool on the CPU. thumb.gif

Also this is a good thread to read: http://www.overclock.net/t/1411077/haswell-overclocking-guide-with-statistics/0_100
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post #6 of 27
There might be some sort current/power protection on the motherboard you're using causing it to shutdown. Had a similar experience on my z97 motherboard
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post #7 of 27
Thread Starter 
So I checked the temps and sure enough, Prime 95 caused an instant spike to 95+C and then the shutdown. I then researched the issue and my H100i backplate was a little loose, which is a known issue. I corrected the problem and reseated the cooler after a nice cleaning. All is well right? No wiggle with the backplate, it mounted perfectly.

I ran IBT for about 6 seconds and the temps are okay, slowly going up to 50, 60... They settled at 65 or so. Then my rig still reset. Prime is still immediate... This time with no change in temps.

Any ideas from here guys? I'm unfamilliar with the UEFI on my mobo, so if you could point me into the right direction if it's a setting there I would appreciate it.
Edited by xDriftyy - 9/16/14 at 7:53pm
post #8 of 27
Looks like its a MB and CPU issue. there are a lot of other people who are running into the same situation. it seems like if the CPU runs above 30% usage the temps will go above 80C and 90C in some cases.

This would explain why prime instantly shuts down cause the system is shutting off to protect against thermal issues.

"Thanks for the update boolybooly. An update for me, I updated my BIOS to F5 for my mobo and found cpu usage has decreased a little bit resulting in temps lowered by maybe 10-15 degrees celcius. However, should cpu usage increase beyond say 35%, temps increase past 80 going into 90s degrees celsius. I see that we are the guinea pigs on this new processor. Very poor testing standards by Intel and Gigabyte."

you can read about some of this from this link:

http://www.google.com/url?sa=t&rct=j&q=gigabyte%20z97mx-gaming%205%20shutting%20down%20issues&source=web&cd=9&cad=rja&uact=8&ved=0CFwQFjAI&url=https%3A%2F%2Fcommunities.intel.com%2Fthread%2F54032&ei=XfoYVKbOL8PkoATk2YLYDA&usg=AFQjCNGF5PDRCOKPqP2UMxU5VJ62i9YQSg


seems like the only longterm solution is to delid the cpu and add enough TIM so that the heat transfers properly.

either way good luck with you situation.

edit: here is another link of people in your situation some tried delidding.
http://www.google.com/url?sa=t&rct=j&q=ngptim%20issues&source=web&cd=2&cad=rja&uact=8&ved=0CCoQFjAB&url=http%3A%2F%2Flinustechtips.com%2Fmain%2Ftopic%2F179597-intel-%25E2%2580%2598devil%25E2%2580%2599s-canyon%25E2%2580%2599-chips%25E2%2580%2599-ngptim-is-still-not-efficient%2Fpage-2&ei=MP4YVIuUCI7koAS-qYDABA&usg=AFQjCNGCXsnrziL2khkEoI26yP0dFz9a5w&bvm=bv.75558745,d.cGU
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post #9 of 27
Thread Starter 
Quote:
Originally Posted by wooshna View Post

Looks like its a MB and CPU issue. there are a lot of other people who are running into the same situation. it seems like if the CPU runs above 30% usage the temps will go above 80C and 90C in some cases.

This would explain why prime instantly shuts down cause the system is shutting off to protect against thermal issues.

"Thanks for the update boolybooly. An update for me, I updated my BIOS to F5 for my mobo and found cpu usage has decreased a little bit resulting in temps lowered by maybe 10-15 degrees celcius. However, should cpu usage increase beyond say 35%, temps increase past 80 going into 90s degrees celsius. I see that we are the guinea pigs on this new processor. Very poor testing standards by Intel and Gigabyte."

you can read about some of this from this link:

http://www.google.com/url?sa=t&rct=j&q=gigabyte%20z97mx-gaming%205%20shutting%20down%20issues&source=web&cd=9&cad=rja&uact=8&ved=0CFwQFjAI&url=https%3A%2F%2Fcommunities.intel.com%2Fthread%2F54032&ei=XfoYVKbOL8PkoATk2YLYDA&usg=AFQjCNGF5PDRCOKPqP2UMxU5VJ62i9YQSg


seems like the only longterm solution is to delid the cpu and add enough TIM so that the heat transfers properly.

either way good luck with you situation.

edit: here is another link of people in your situation some tried delidding.
http://www.google.com/url?sa=t&rct=j&q=ngptim%20issues&source=web&cd=2&cad=rja&uact=8&ved=0CCoQFjAB&url=http%3A%2F%2Flinustechtips.com%2Fmain%2Ftopic%2F179597-intel-%25E2%2580%2598devil%25E2%2580%2599s-canyon%25E2%2580%2599-chips%25E2%2580%2599-ngptim-is-still-not-efficient%2Fpage-2&ei=MP4YVIuUCI7koAS-qYDABA&usg=AFQjCNGCXsnrziL2khkEoI26yP0dFz9a5w&bvm=bv.75558745,d.cGU

Thanks for the reference links. I managed to tweak my setup a little and I can pass 5 tests of IBT with all 32GB of my RAM now. Prime95 is still an instant reboot but I really don't care. I undervolted a little and I'm in good shape, maxing out at 85C.
post #10 of 27
What version of IBT are you using? Have you updated to the latest Intel Math Kernel Library?

Prime95 instantly rebooting is indicative of a major issue somewhere. Even if you don't see any problems in anything else, yet, it would still be a good idea to figure out exactly what's going on so you don't run into any unpleasant surprises down the line.

First thing I would do is redownload and reextract Prime95, incase the program has been corrupted somehow. Then I'd see if the system can run it at stock without issue.
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