Pc keeps restarting by itself

CajunJ · Jul 12, 2014

I have been dealing with this problem for about a week now since I've upgraded my motherboard, CPU and video card. I though it was because of thermal paste so I reapplied paste. That didn't work. I bought a new PSU and when that didn't work I bought the 212 evo fan for CPU. Ran memtest86. Ram is fine and still having random restarts. Someone please help.

ekagori · Jul 12, 2014

Did you reinstall windows? If you didn't, improper drivers can cause problems. Are you getting blue screens?

CajunJ · Jul 12, 2014

I have reinstalled windows and no blue screen

ekagori · Jul 12, 2014

Did you make sure that your old RAM is compatible with your new motherboard?

CajunJ · Jul 12, 2014

I am not a home to check at the moment but I do have DDR3 r with a Z97 motherboard if this helps

ekagori · Jul 12, 2014

CajunJ :

Check RAM compatibility and also are you overclocking your system? If so, it might be unstable and need to dial back settings to a stable overclock.

CajunJ · Jul 12, 2014

Still not home to check RAM and no overclocking.

CajunJ · Jul 12, 2014

Checked RAM and it's good for my motherboard.

ekagori · Jul 13, 2014

Ok, I know you said you bought a new psu, which one did you buy? What are the rest of your system's specs? And what temperatures do you get on your cpu and gpu when running your pc?

CajunJ · Jul 13, 2014

i7 4790K
GIGABYTE GA-Z97X-UD5H LGA 1150 Intel Z97
EVGA 780 FTW edition
G.Skill 8G
Corsair RM750

ekagori · Jul 13, 2014

Hmmm... try checking your motherboard installation for any potential shorts. Also try discharging your motherboard from static by powering off the psu from the back switch, unplug the cord, hold down the pc's power button for 30 seconds, plug the psu again, turn it on and power your system back up. See if that helps.

I can only think you either may have a defective motherboard or RAM. It might pass memtest but still cause other errors that memtest won't pick up.

CajunJ · Jul 13, 2014

it seems to do it when cpu is at heavier load. when i try and run Prime95 the pc restarts itself about 1 or 2 second into the test

ekagori · Jul 13, 2014

Try checking the temps on your cpu while running prime and if they're high, check that your evo is making good solid contact with the cpu.

CajunJ · Jul 13, 2014

Was only able to run prime for 2 seconds before it restarted my pc. Temps didn't seem to raise in those 2 seconds

ekagori · Jul 14, 2014

Which prime test are you trying to run? Small fft or blend? Small ffts stresses could, blend stresses ram more. If it is blend, try to run it using just one stick. One of your sticks might be defective if it is a blend test.

CajunJ · Jul 14, 2014

I woke up to a error that windows gave me. 0xc000021a not sure what that error code means

CajunJ · Jul 14, 2014

I tried all test. Blend I get 2 seconds in and on the other one it instantly reboots

ekagori · Jul 14, 2014

I'm not sure about the error code, not my area of expertise, but I think it's related to windows not being able to boot up. Might want to start a thread on the debug side, some good guys here that can help you out there.

As for the prime test, I'm a little at a loss now, do you have the heatsink's cpu fan connected to the motherboard's cpu fan header? Otherwise it's almost as if it was your cpu that is going bad. As if it can't handle a big load. Do you have another socket 1150 cpu to test with? perhaps a friends? Otherwise it could be the motherboard.

CajunJ · Jul 14, 2014

You think these reboots can be from a failing hard drive? I tested one of my hard drives and it failed to read element on the extended test.

ekagori · Jul 16, 2014

Unless the hard drive in question is the one with your os on it, then it shouldn't matter. But if a hard drive is failing try to chkdsk /r to try a repair of bad sectors.

Pc keeps restarting by itself

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