Windows 10: All DirectX12 games crash on startup

I've recently come across this bug while trying to play Sea of Thieves. I had a different crash message, but when I tried to launch another UE4 game PUBG in this case, I had a crash like this. This error message is from Dead by Daylight, of course, but it hasn't worked in Deep Rock Galactic or Insurgency: Sandstorm either. What really perplexes me is the fact that Tower Unite works, despite the game being on UE4. Due to this, I have reason to believe that DX12 is the problem, since all of those previously mentioned games run off of DX12 except for Tower Unite, which is run from DX11.

I am running an underclocked for the sake of trying to fix this EVGA GTX 1080ti and an i7 8700k OC to 4.7GHz

I've tried uninstalling and reinstalling my graphics drivers both manually and through GeForce Experience, uninstalling each game in question, doing registry edits TdlDelay to 10, reinstalling DX from the installer on the Microsoft website, and virtually every solution I've found on the internet.

Any assistance would be appreciated. I am really going insane trying to find a solution.

Here is an example of the crash log I get while trying to launch Dead by Daylight:

1. Assertion failed: [File:Unknown] [Line: 198] Unreal Engine is exiting due to D3D device being lost. Error: 0x887A0020 - 'INTERNAL_ERROR'
3. DeadByDaylight_Win64_Shipping {0x0000000000000000} + 25327097 bytes
4. DeadByDaylight_Win64_Shipping {0x0000000000000000} + 25073690 bytes
5. DeadByDaylight_Win64_Shipping {0x0000000000000000} + 24830071 bytes
6. DeadByDaylight_Win64_Shipping {0x0000000000000000} + 24829816 bytes
7. DeadByDaylight_Win64_Shipping {0x0000000000000000} + 29637364 bytes
8. DeadByDaylight_Win64_Shipping {0x0000000000000000} + 29642646 bytes
9. DeadByDaylight_Win64_Shipping {0x0000000000000000} + 29643743 bytes
10. DeadByDaylight_Win64_Shipping {0x0000000000000000} + 29600907 bytes
11. DeadByDaylight_Win64_Shipping {0x0000000000000000} + 35190731 bytes
12. DeadByDaylight_Win64_Shipping {0x0000000000000000} + 35181399 bytes
13. DeadByDaylight_Win64_Shipping {0x0000000000000000} + 40378236 bytes
14. DeadByDaylight_Win64_Shipping {0x0000000000000000} + 40386633 bytes
15. DeadByDaylight_Win64_Shipping {0x0000000000000000} + 24136899 bytes
16. DeadByDaylight_Win64_Shipping {0x0000000000000000} + 35475826 bytes
17. DeadByDaylight_Win64_Shipping {0x0000000000000000} + 35478984 bytes
18. DeadByDaylight_Win64_Shipping {0x0000000000000000} + 25361339 bytes
19. DeadByDaylight_Win64_Shipping {0x0000000000000000} + 25350204 bytes
20. kernel32 {0x0000000000000000} + 97236 bytes
21. ntdll {0x0000000000000000} + 446161 bytes

:)

 

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?

 

Can't get GPU-Z to start with Windows 8.1 startup

I'm not sure how to do that. Could you list the steps for a noob?

 

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.