BSOD and crashing while playing CSGO, sometime other games

My PC started crashing suddenly after installing Windows 10. I obviously thought it was fault of the OS so I reinstalled 7 Ultimate x64, yet the crashing kept on happening. I haven't done any changes to my PC and it's been stable for months. Last change was GTX970 in May. i5-3570K is overclocked to 4,4GHz but it's been rock solid so I doubt it's the cause of issues. I'm honestly completely out of explanations.

Setup: i5-3570K (4,4GHz @ 1,32V), MSI GTX970 (Stock, was OC'd before), ASRock Z77 Pro3, 2x4GB G.Skill Ripjaws 1600MHz, Samsung 840 Evo 250GB, Kingston 60GB SSD cant remember model, 1TB HDD.

From what I can tell, the issue shouldn't be GPU, Memory, PSU or SSD/HDD drives. I doubt my OC'd i5 would suddenly start acting up as it's been stable and temps have been good (I'm running AIO water). I'm pointing the finger towards motherboard as it's been acting up once in a while, but I'm not sure if that makes any sense.

I've tried:
Reinstalling clean Windows a few times - crashes and BSOD here and there keep on happening with nothing installed apart from standard drivers, Steam and CSGO.

Reinstalling Windows to another SSD - no effect.

Downgrading to 3 different Nvidia drivers and been using 353.30 - maybe little bit less crashes, no real effect

Running Memtest86 for 8 hours - 0 errors

Running 3Dmark on loop for 2 hours while overclocking the card - stable as a rock, TDP 110% so PSU should be fine

Taking another memorystick out - no effect

Hiya and welcome to SevenForums!

Code:

BugCheck 101, {31, 0, fffff880009ef180, 1}

Probably caused by : Unknown_Image ( ANALYSIS_INCONCLUSIVE )

Code:

BugCheck A, {2d, 2, 1, fffff80002ed3c94}

Probably caused by : ntkrnlmp.exe ( nt!KiSearchForNewThread+214 )

Code:

BugCheck 3B, {c0000005, fffff80002c861b9, fffff880046e7e30, 0}

Probably caused by : ntkrnlmp.exe ( nt!KiSystemServiceHandler+7c )

Reset any overclocking, because 0x101's are a overclock related issue. Reset all overclocking.


Run sfc /scannow and chkdsk /r.
Install the latest updates from Windows Update.

Do the exact same steps for chkdsk /r but instead of typing in sfc /scannow type chkdsk /r.

SFC /SCANNOW Command - System File Checker

Hey, thanks for your help!

I did both and neither showed any issues. I lowered my OC and haven't had a crash yet, though I've been busy with MGSV and even Ground Zeroes never really had crashes. I do find it strange I can loop 3DMark for an hour with no issues but something lightweight like CSGO could start crashing because of OC that's been stable for months.

Anyway, if the reason is the OC, is it certain the CPU is breaking down or could the motherboard power delivery be dying or something?

No, it's not that. Nothing is occuring, it's just the system that doesn't like the overclock.