I just upgraded to 4090 and there is some bizarre latency / lag that is absolutely nauseating and every 5-10 seconds the image will glitch, swap positions for a split second frame, don’t know how to describe it. I just tried clean updating the display driver, disabled HAGS, I don’t know what else to do short of reinstalling SteamVR.
Zero problems in 2D.
90 Hz, Windows 10, everything worked perfect with the 3090, upgrading the GPU was the only change that was made.
Clean installed 526.61 Hotfix, problem existed with previous driver as well.
The irony is that I upgraded from 3090 to 4090 primarily for VR as the 3090 handles 2D 5120x1440 just fine (dips to 70 FPS in the most demanding RT titles) so this just makes the purchase feel like a big waste of money.
See the comments in that thread, it seems everyone with a 4090 has this issue and nothing resolves the problem. Before Pimax address the issue via firmware there first needs to be acknowledgement of the problem. Right now Pimax is gas-lighting those who have submitted tickets with copy-and-paste “disable HAGS” “solutions”.