Computer randomly shuts down

[asdf2061]

I built a computer about 2 months ago, and now I have these sudden random shutdowns that occur arbitrarily. Can someone help me?

 

Things I've done/Tips/Clues etc.

 

• Used one stick of RAM at a time, tried both by themselves.
• Cleared CMOS
• My computer had updated its BIOS, but I've since flashed it back.
• Exchanged both my processor an MoBo at my nearby MicroCenter for new ones.
• Booted without GPU
• RealTemp says my CPU doesn't go above 40C when this happens. (usually) Realtemp isn't that big of a help as the temps it gives me are too wobbly to create a valid temperature.
• It happens when I do something with my computer like clicking on a link, changing in-game settings, pressing enter,etc.
• Re-applied thermal paste.
• The computer just shuts down. After that, it will either attempt to reboot and into a cycle or go back to Windows.
• Event Viewer just says "This computer rebooted without clearly shutting down" as a Critical Warning. No help there.
• After the computer shuts down, I turn off the computer altogether to prevent it from going in a reboot cycle. If I directly turn it on at that time, it ether doesn't POST (fans spinning loudly with nothing happening) or it goes back into a reboot cycle. If I wait about 10 min, it can boot up correctly again.
• I've reformatted my SSD and reinstalled Windows around 5 times now with no results.

 

Specs

• CPU: Intel i3-6300
• Motherboard: Asus Max. 8 Hero Alpha
• RAM: G.Skill TridentZ 16GB 2800MHz
• PSU: EVGA P2 650W
• GPU: Asus Strix 1060 Non-OC
• SSD: Sandisk 480GB Ultra II

 

[Valkyrie Lenneth]

sounds like a power supply rail issue to me, that drops voltages output on certain loads, could be as somthing as simple as a chipset driver or ssd/hdd problems though

[asdf2061]

7 minutes ago, Valkyrie Lenneth said:

sounds like a power supply rail issue to me, that drops voltages output on certain loads, could be as somthing as simple as a chipset driver though

But could that explain why my computer actually boots when I let it "rest" for a few minutes after I shuts down? As I said above, if I let it directly reboot, it will start looping and when I do otherwise and let it stay powred off for a few minutes, it's fine.

[Valkyrie Lenneth]

 

1 minute ago, I_IHaveNoLife_l said:

But could that explain why my computer actually boots when I let it "rest" for a few minutes after I shuts down?As I said above, if I let it directly reboot, it will start looping and when I do otherwise and let it stay powred off for a few minutes, it's fine.

yes powersupply failures can explain that, but then again  if its powered off for a few minutes and then its fine, it could also be static electricity which would be rare,  but also try unplugging ur powersupply from the wall and then press the pc powerbutton for like 5-10sec to drain electricity left in it, then connect it again and start,,, if it is fine then its due to static electricity or powersupply failure ( confirmed then )

[Valkyrie Lenneth]

also to check temps download CPUID HWMONITOR aka HWMONITOR it reads sensors from ur mobo nothing else

 

run prime95 small fft to check maximum temperature @ cpu , but first ofc check idle

 

for general stability checking run prime95 blend or custom mode ( filling ur ram manual ), if prime95 crashes no matter the circumstances there is an instability in the system

[asdf2061]

1 minute ago, Valkyrie Lenneth said:

also to check temps download CPUID HWMONITOR aka HWMONITOR it reads sensors from ur mobo nothing else

 

run prime95 small fft to check maximum temperature @ cpu , but first ofc check idle

I've tried multiple benchmarks and they all work fine.

[Valkyrie Lenneth]

8 minutes ago, I_IHaveNoLife_l said:

I've tried multiple benchmarks and they all work fine.

sounds more like it is driver related to the chipset then, but then again due to the pc not working after a while i have more thoughts on a failing psu in that case, it could be either psu or driver related( or at last the hdd/ssd ), other then that i doubt it really as u already switched mobo and cpu

 

check with hwmonitor if ur +3.3 +5 +12v rails are stable,   if they do drop voltage or increase voltage while stressing the system the psu is unstable, a good psu shouldnt drop any of these rails at all, and rail drops can cause instability or even in the long term damage to hardware, if the rails are fine however it must be static electricity or driver related , unless u havent set ur ram timings manual in the bios to their proper timings, i doubt it could be ram however it is possible if u didnt set the timings manual

 

for now i cant think of more for u to check other then all this