Help. Lag Spikes followed by restart

shamiro.shamiro

Prominent
Nov 21, 2017
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Hello guys, so after a really long time of searching through various forums for a clue to my computer issue I've decided to finally come here and rely on Tom's Hardware community for an answer or some tips.

So basically I get a random lag spikes mostly followed by hard crash on my computer quite often when on the load. like playing games or watching movies. And it is extremely weird of how it happens.
So let's say I'm playing something, so the Screen will freeze for 3seconds, and then everything gonna come back to normal for a few seconds, and it will freeze again, and like this for a few minutes then hard crash.
Or sometimes after first time it freezes it will hard crash with no error message what so ever.
So here's things I've tried so far.

I've noticed after crashes if I go back to the game, it's textures become black weird moving squares, only on some bits, but it will then come back to normal and run properly until it crashes again. These crashes are extremely random I've noticed, but usually on the intense graphical load.

*Took all components apart and cleaned it
*Installed a new CPU tower fan (thought it's overheating - false)
*Ran a CPUID monitor software to check for temperature issues (none)
*Ran a stress test on my GPU (5minutes)(75C max) , does not crash at all
*Ran a stress test on my CPU (10minutes)(72C max), does not crash at all
*Took my bios battery and let it sit for a few days (No luck)
*Checked the wiring from the PSU (seems fine)

Unfortunately I'm not a tech wiz so I don't have a tool to check for the wattage of the components.

My event log before crashes has some errors like: "source" nvlddmkm "event id" 14
and there's a lot of the same one's
I can count 10 of the same errors in the past 10minutes or so.
(I'm not sure if this is related but it would make sense, because it crashes after this)
I've researched online - it's nvidia drivers fault. I had a latest drivers it was doing the same, now I've dowgraded by a few years, it still does it.

And lastly that's my PC information. Sorry for a long post btw, but I'm getting desperate.

Windows 10
Intel core i5 4690k
8GB of ram
Nvidia Geforce GTX 770
AsusTEK Computer INC z97-A
1TB HDD
250GB SSD

I appreciate for all the answers, thanks in advance.