Windows 10: Crashing (?)

I have recently encountered a problem with my PC
Whenever I boot up a game and play for about 10-20 minutes (First noticed and happens irregularly with HoI4 and Stellaris, but happens 100% of the time within 5 minutes of Life Is Strange 2), my computer screen loses signal. Audio and applications still run for about 20-30 seconds but then they all stop functioning as well. The computer is still on but the only thing I can do is perform a hard shutdown by holding the power button My computer isn't overheating, and I've already run a check disk prompt, repaired the disk, installed and updated my drivers and my issue still continues.

I'm running a custom rig with an i7 8700k, GTX 1070ti, 16GB RAM, and a 1tb SSD.

:)

 

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?

 

all games crash!

ive watch my temps and both the cpu and gpu are within normal ranges. when it freezes it simply freezes the image and stops the sound. i must reboot to get back to windows.

 

GPU-Z 0.8.7 crash on launch

W1zzard is asking you to test so that he can suggest next steps and be able to troubleshoot the issue you have.
If another version works, it would be one set of steps.
If several other versions also fail/crash, then it would be another.