Windows 10: Persistent crashing. Even after fresh install.

I’ll try to make this as brief as possible. I’ve had an issue for months now where my computer runs totally stable, until I try to play any game, nothing ever gets hot even slightly when I monitor temps, the only codes I keep getting on the blue screen which flash’s and I had to record it with my phone and pause it to get the code. It says “critical process died”. Ive reinstalled windows twice now and both main hard drives are clean other than a third hdd storage drive for movies and music is plugged in. If i stress test all the components separately they pass, I've even tried replacement har

:)

 

The Vista SP2 install thread

kept crashing on the last step when i used the installer from sp1 to sp2, better to start fresh with an iso

 

CLOCK_WATCHDOG_TIMEOUT after a fresh install

 

all games crash!

I suggest you run rthdribl > http://www.daionet.gr.jp/~masa/archives/rthdribl_1_2.zip
Increase the window size step by step and watch your vga temps permanently.
What happens?
If it crashes, run at stock speeds as suggested before and retry.

P.S.: When your system locks, does the display signal turn off after a time?
Stuttering sound or no sound at all when freezing?
What X1800XT model do you own exactly?