Pc Randomly restarts

Dec 31, 2016 2:12PM PST

Hello i need help

So Basically i just built a new PC for low End Gaming.
Core i7 6700k
HyperX 2133 Mhz Ram 8GB
Gigabyte z170x-gaming 3
and Hyper 212 EVO cooler

This is the new hardware i bought and installed these things from my old hardware
Gigabyte GTX 960 g1 gaming
Corsair vs550 Powersupply

Intel 520 Series SSD
Seagate Baracuda 1TB

So the issue i am facing is that my pc randomly restarts sometimes without even having any voltage problem sometimes my pc run without a hitch for 6 7 hours with gaming streaming etc

but then suddenly it restarts and when it start then the problem become consistent and even the GPU stress test wont work once it start restarting if i try to test it it restarts as soon as i press go for GPU stress test.

but its completely random e.g today in the morning i ran the test for 30-60 mins left my Game on for 2 hours no restart but now iwas just streaming some videos and it restarted btw it only restarts when my GPU fans are turning when they are on idle it never happens after diagnosing it talking to different people about it it seems my supply is weak for all that hardware because it might be old and its not giving that efficiency so i ordered a new supply i will get it in 2 days but i wanted to ask you guys that if it is only the supply problem because i am a bit worried that why wont it consistently restarts why is it random i don't know much about the supplies and yesterday i ran my pppc without the gfx card installed was working fine but i don't know it might have restarted because its random sometimes pc run smoothly for even 7 8 hours constantly sometimes it just start restarting in an hour btw there are no blue screen or anything that can indicate GFX card issue it just resets like i pressed the reset button

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Things to get out of the way.
Dec 31, 2016 2:34PM PST

Be sure the BIOS is latest and in the defaults settings.
Be sure the RAM is on the supported list.
Try it with one stick of RAM.

The quick look at the PSU doesn't tell me it's that. My thoughts are either a motherboard, RAM, CPU or GPU issue.

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Working Fine with GPU or low End GPU compared to 960
Dec 31, 2016 2:58PM PST

It only occurs when my GPU fan starts after that sometimes it happens. tried without the GPU and tried another GPU GTX 650 it was working fine for day with no restart so my guess was either its the GPU issue or Supply output is weaker than before my last build was
Intel Core i5 4590
Corsair Vengeance 8GB single
Asus b85m-G micro-atx
The Supply and Graphic card are both 1.5 years old
PS My windows is 10

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Sounds like the GPU too.
Dec 31, 2016 3:09PM PST

Now there are instances where it's BIOS and drivers but you covered that.

The PSU looks to be over double what the rig requires unless there is some until thing like "I have 12 HDDs."

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Update on the Problem
Jan 1, 2017 7:05AM PST

So i have narrowed down the problem to the source So basically when my GPU temp is over 55 only then my pc restarts if its on idle or even with gaming streaming is stays under 55 it will never restarts does The GPU Draw more power for cooling when its over 55? the GPU is running fine on other pcs over 55 and i don't have another same type of GPU to test it on my pc

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The PSU didn't look to be suspect here.
Jan 1, 2017 9:13AM PST

The PSU looks to be single rail and not overtaxed. There are issues with bus timing on some motherboards so as things heat up, timing skews around and a reboot may happen. I do not suspect a power issue but timing and bus issues you see with OVERCLOCKING, out of date BIOS and drivers.

But you covered that so try another GPU of same and if it does it still, my bet would be the motherboard needs to be another make or model.

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Sorry for Missing out on the Bios update
Jan 1, 2017 12:51PM PST

Sorry i missed that you asked if my bios is updated so now basically what you are saying is that i should flash my bios to the latest one because it is facing issues with setting up bus timing so basically you are saying its not the GPU or PSU issue but timing issues and its working fine with other gpu and without gpu because the timings are different i am pretty amateur in flashing bios i just did it once on my i3 gigabyte board. IT went smoothly but i know its really risky so i will probably take my pc tou me pc guy and will update it there with caution i have ordered the supply already so i will flash the bios as soon as it arrives and hopefully you are right because i don't want to get this new motherboard repaired or rams exchanged i am buying a GTX 1060 anyway so not worried about the card much

Post was last edited on January 1, 2017 12:57 PM PST

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I wish it was a slam dunk.
Jan 1, 2017 12:55PM PST

When I work cranky machines there's a list of items that we just get done. The BIOS is one of them along with BIOS defaults. In decades we have yet to lose a board. But this is not a cure but an item that gets done early on.

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Jan 1, 2017 1:06PM PST

ok so it could still be something else so i have to keep my finger crossed after updating the bios and installing the supply

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Problem Fixed
Jan 6, 2017 1:15PM PST

Hello i just wanted to let you know that what fixed the problem basically i updated my bios but it didn't fix the problem so the power supply arrived i installed it and bam its working fine i checked my old supply the capacitors were old and were not working and since the new hardware had leds etc and the powersupply was not enough to support it so just in case someone else face this problem ask them to check their supply too since alot of people told me that the Corsair VS series PSUs are weak. and alot of people in my Country have faced this problem with the exact psu vs550 or 650

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PSUs do age.
Jan 6, 2017 1:24PM PST

While you used the old PSU I had no reason to call it out. Now if it was in some hot case over a few years, yes, I would have reason to worry.

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Dec 31, 2016 3:34PM PST

Did you reinstall the OS?

Did you install the drivers that came with that mobo?

Did you check the gigabyte site for driver and bios updates?

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Jan 1, 2017 1:54AM PST

Yes Did everything except the bios update

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BIOS sets timing of busses.
Jan 1, 2017 9:14AM PST

I can't guess why you left out a basic item like this. Now if you told me the BIOS was current that's one thing but that's not how I read this.

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Just to get it out of the way
Jan 1, 2017 10:38AM PST

Get the latest bios.
Set the bios to defaults.

Remove the shroud from the gpu and give the innards a good cleaning.
If you have or can get some thermal paste redo that while you've got the card open.

Get the latest driver for that gpu.
Don't let windows update drivers.

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Update on the Problem
Jan 1, 2017 7:03AM PST

So i have narrowed down the problem to the source So basically when my GPU temp is over 55 only then my pc restarts if its on idle or even with gaming streaming is stays under 55 it will never restarts does The GPU Draw more power for cooling when its over 55?

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