I don't know what to do anymore. Screen flickering/glitching and random rebooting in Windows 10

[NoL1c]

Hey.

I've been having these problems for a LONG time now, and I've tried everything I can think of to fix it.

Whenever I'm in Windows or trying to install Windows I get terrible screen flickering/glitching and what seems like endless rebooting. I don't know how to best describe the problem, so I made a short video:

[video="https://www.youtube.com/watch?v=0jZRGq7wFMg&feature=youtu.be"][/video]

• 
  - Tried swapping cables on just about everything
  - Swapped SSDs from a computer that works
  - Removed GPU and even tried with a different GPU
  - Updated and rolled back BIOS many times
  - RMA'd the motherboard, they couldn't replicate the issue

Specs:
i7-8700K
ASUS STRIX Z370E
EVGA 1080 Ti FTW3
Samsung 850 EVO 1 TB
EVGA SuperNOVA G3 650W


Please watch the video and tell me what to do. I don't know what to do anymore.

 

[Colif]

Have you tried another screen??

 

[The Paladin]

have you tried a different computer screen or PSU ?