Okay, then it's probably a driver issue. Try reinstalling the GPU drivers.
Mine, I have 64GB RAM, running a GTX 4070, had similar issue. Reinstalled the drivers, cleared it right up.
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Hello, Xanthicis! Sorry to hear that! But, pls don't panic. We're here for you. ;)
For the D3D issue, it could be many things. Please let's start with this: D3D ISSUE, POSSIBLE SOLUTION .
CaetusGorebite, thanks! :)