[boomboomsubban]

I also had a HD 7850, and though I had pushed it less than you I never noticed any huge issues.

It was in a uniquely terrible position of being one of the last cards released supported by radeon when all the development had moved to amdgpu, which it supposedly could run if you jumped through the right hurdles. I remember the xorg feature table having several things working for older and newer models but not the 7850.

Still, my experience with it led to another AMD card that I've also been quite happy with.