cpu load

Build Specs: Intel i7 6700k NZXT Kraken M22 120mm AIO ASUS Z170-A Motherboard Crucial Ballistix 4x4 16GB DDR4-2400mhz Ram Nvidia Geforce GTX 980ti 6x120mm Case Fans Corsair 1200W Platinum Certified 80+ PSU (Yes overkill on the PSU, had 2x980ti's at the time of the build 4 years ago.)...

Recently My PC has been crashing when I have been playing games for a couple of hours or so. It either hard freezes or BSoDs. I have had the errors Clock_watchdog_Timeout, WHEA_uncorrectable _error and Machine_check_exception. I have run ChK dsk and sfc/scan and no problems have shown up...

View: https://imgur.com/a/8nlrrGW You can see in the row "GPU Load", every 30 seconds or so, it drops to 0, freezing my game, for a few seconds, then returns back to normal. This only happens in Steam games as far as I can tell, and it makes them unplayable. I've tried reinstalling Windows...