PC keeps randomly rebooting, no loss of power

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BigBearMeat

Commendable
Dec 27, 2016
3
0
1,510
I apologize if this was asked already, but I am at wits end! My computer randomly reboots, sometimes after hours, but lately only after a few minutes. There is no blue screen or error code (already changing the setting in Windows to make sure it will show up). I have run tests on the RAM and hard drive which both checked out. The self-test on the PSU is ok. I used the Windows cpu diagnostic tool to check on my processor. It passed, though I am not too sure how meaningful that is. The motherboard is securely fastened to all 9 risers required. I have not inspected the processor for any damage or defects or looked at the motherboard for any burnt/bulging capacitors or damage, but there is no blatant signs of damage. Everything runs fine while my pc is on. What am I missing?

I have had this setup for 2 years with no problems. This has started out of the blue a couple of weeks ago.

System Specs:
ASUS STRIX GeForce GTX 4 GB DDR5 256-bit
Kingston HyperX Predator DDR4
ASUS Rampage V Extreme
Intel i7 5930k Haswell 3.5 ghz
Corsair AX1200i
Samsung 840 Pro Series 512gm ssd
 
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MeanMachine41

MeanMachine41

Judicious
May 8, 2014
5,195
336
33,390
Hi BigBearMeat :)

Random shut downs like what you have described can be many things. Lets do some Stress testing and see if we can narrow down the problem to first eliminate most of your hardware from the equation.

Download AIDA64 and HWMonitor and put them side by side on your desktop.
In AIDA64 go to the Tools menu and select to run the stress test.
Check the boxes for CPU, FPU and Cache and run the test for 10mins. Stop the test if temps climb above 80C.
At the 10min mark, take screen shots of HWMonitor and AIDA64 and upload files to IMIGUR or your favorite file server. Obtain the BBurl to link files here for analysis.

I will be wanting to see all rail voltages during the test in HWMonitor to see that your PSU is doing its job.
With 100% utilization of all cores, I want to see what your temperatures are like at the 10min mark.

You can run separately the test on your RAM for 30mins. This however is not as conclusive as using Memtest86 from a USB stick which should be done for 3 passes.
A separate test can be run on the GPU.

If the culprit is not found then you will have to consider a MB or CPU fault however, the easy things first as that would involve a strip down and benchtest.
 
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MeanMachine41

MeanMachine41

Judicious
May 8, 2014
5,195
336
33,390
Well you can rule out the PSU as your voltages are within spec and your temperatures under stress are OK.
It could be Windows related so a few checks for that are in order.

Have you made any changes or added any new software lately.?

In case of any corrupt windows files run "SFC /SCANNOW" in an elevated command prompt which will interrogate your system files and attempt to fix any it finds.

Also do a CHKDSK on your HDD or SSD. If errors are found then use the extensions /r and /f which will schedule a fix or repair on your next boot. The /r will not work with an SSD.

You should go into Device Manager and check for any Yellow Triangles to see if its driver related.

Also check with Task Manager for any service that's running at the time that may be suspicious.

Event Viewer can sometimes identify the culprit so look for any critical events that have been recurring.

Malware can cause these issue so run your Virus software.

If all check out OK then its down to your MB or Peripherals and a breadboard session would be required. In this minimized state you add each hardware component at a time till the culprit is found and this way also eliminates Standoff or Case issues.

Good Luck BigBearMeat and I hope you find the problem soon.
 
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BigBearMeat

Commendable
Dec 27, 2016
3
0
1,510
CHKDSK came out all clean. Running SFC/SCANNOW every test was succesfully completed except for this portion:

Unspecified Changes to system configuration might have caused a problem.

Repair action:
Result: Failed. Error code = 0x32
Time Taken = 297 ms

Repair action: System Restore
Result: Failed. Error Code = 0x1f
Time taken = 113828 ms

Repair action: System files integrity check and repair
Result: Failed. Error code = 0x2
Time taken = 2250 ms

I ran the prompt again a 2nd and 3rd time with the message:

Windows Resource Protection did not find any integrity violations.



And as far as any changes, I did move my PC for a LAN party roughly a week prior to these problems. I also want to say I vaguely remember a Windows update as well. Thinking back, I do remember having some strange issues, though different than this instance, after some connectors jostled loose from my motherboard after moving my PC. Hoping it is just the case as the other parts may prove to be too costly for me to replace at this point in time.

Thanks for the help MeanMachine. I'll likely end up disassembling and piecing together as you advised.
 
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