Windows 10: Games crashing after 30min playing them

Hello, I just built d new pc and all my games are crashing after some time of use. Here is some Minidump fileshttps://1drv.ms/u/s!AjofvVKVOE37jkWFHN3v6TMQbFAd?e=TFpFn6pls help me with this issue

:)

 

Games crash or system crash frequently when playing games

Initially I thought it was the problem of a specific game. But later on I found for all the games (COD16, DOTA2, APEX, Satisfactory, Conan exile and so on) I'm actively playing, either the system would crash (bluescreen) or the game itself would crash once
I've played it for a while (e.g. more than 30min). In certain extreme case, the game would crash three times in an hour. I would really appreciate it if someone would be willing to look at the minidumps. All dumps are shared

here.

FYI: I'm using win10 home 1909 with all available updates installed. I was using 64GB RAM before september and later on I took 32GB away to see if it's the problem of RAM.

 

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?

 

Xbox Play anywhere games

I uninstalled and re-installed the game. The freezing is still happening.