Hi all, I have 2 systems (laptop and desktop) that seem to be behaving reliably after I put 5.10.16-200.fc33.x86_64 and i915.mitigations=off on each system. Time will tell if they remain graphically stable.
My desktop GPU chipset is the same as @sameyepatch and @anthonys53 so if your mileage is different, I would suggest running
journalctl -b0 | grep mitigations and see if the i915.mitigations=off made it into the log without errors other than the kernel tainting message. I also took the defaults for the Compositor settings in System Settings.
Supposedly the 5.11.x kernels will have the i915 fix based on my earlier post with the link in it.