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After a relatively long hiatus and a long series of hardware and software updates I have a VR rig that’s working extremely well.
However, at some point a problem crept-in with vorpX that I’ve yet to solve:
Fast and Alt Fast Sync used to work just fine to my Pimax 5K+ for me on my older rig, but on this one neither of those methods is working reliably. I’m getting flickering scenes, lack of sync, different frames in each eye, and that kind of thing. And while it’s somewhat related to overall GPU usage, it’s not any kind of a direct correlation (see below).
Important rig details: Ryzen 5900X and RTX 3080 Ti, 32GB ram. I’m on PiTool v.1.0.1.272_20210917, which I believe is a release-version (non-beta; or at least as non-beta as anything out of Pimax is!) Video drivers are up-to-date (and this issue has survived several updates thus far.)
I have excellent performance in native VR titles and things run nice and cool. I can push the GPU to nearly 100% all the time and it generally won’t even hit 80 degrees c. CPU likewise stays nice a cool (of course, it’s often sitting there not doing a whole lot in GPU heavy games anyway.) For example Alyx runs at 200+ Steam SS in Wide FOV totally without issue and often sees GPU usage clear up at 95+%. Cyberpunk (on my 3D display) will again run at 95%+ for hours. So I’m convinced this is a software issue, possibly an incompatibility between vorpX and my PiTool version? I’ve also tried manually under-clocking my GPU, just in case. Made no difference (beyond reducing my performance.)
More info: This issue *does* depend on the title: I’m having zero issues with Greedfall for example – I have it running at 72hz in virtual cinema mode with no motion smoothing. GPU is often pegged way up above 90% in this title, and everything remains perfect. In FO3 however, I’ve had to switch to “Safe” sync mode. Same for Cyberpunk. The problem worsens with either kind of motion-smoothing (vorpX or Brainwarp) enabled, but is not completely related to motion smoothing. It’s also somewhat related to total GPU usage, but it’s again not completely related to total GPU usage (see Greedfall example above). Both Fallout 3 and Cyberpunk are good examples of titles where I’m seeing this behavior, and I’m having to leave a huge amount of GPU power on-the-table now to get these games to display properly as I’ve now got both of them in Safe sync mode. In Fallout 3 I was pushing 4K, G3D, 45fps/90Hz using vorpX motion smoothing, on my 2080 Super with no issues. Now, on my 3080 Ti those exact same settings result in sync-glitches. (I currently have it running safe Sync mode, 64Hz, no motion smoothing). In Cyberpunk I’m having to leave tremendous GPU overhead in order to maintain a properly synced experience, since Safe mode causes the FPS in the game itself to drop considerably and either of the faster HMD sync modes causes significant sync issues. I can push the GPU usage a bit higher with motion-smoothing off before this issue presents itself. For example, in Cyberpunk, Fast or Alt Fast sync mode, motion smoothing ON, I might start to see this clear down around 50% or 60% usage. With motion smoothing OFF and still in Fast or Alt Fast sync mode I might be able to push as high as 70% GPU usage before I start to have problems. In Safe sync mode all is good but of course my overall frame-rate suffers greatly. I haven’t tested Fallout 4 yet (I have the VR version now, so I’m not really using vorpX for F04 at this point.) I’ve picked-up Life is Strange True Colors recently, so I’ll test that soon.
Sorry for the incredibly long post, but it’s a weird issue and varies considerably title-to-title.
Is there a specific PiTool version I should be trying to use? Any other info on how I might try to get Fast or Alt Fast sync modes to work correctly again?
Thank you!
Topic: Tip: Fallout 3 with VorpX
I am currently playing Fallout 3 with VorpX. Even after the awsome FO4 experience i must say this game (2008!!!) looks so incredibly nice with vorpx, especially with the Fellout mod which removes the greenish lighting in favor of crisp colours and a blue sky. These ini settings my be helpful on random crashes. These settings will also improve FPS and minimize studder. Dont go too high in resolution though which may result in crashes or freezes. I found a resolution of 3600×3700 (Gtx108ti) working well. Push the VorpX sharpness slider all the way up to 2 makes the image look very clear. In my eyes no need for texture mods etc.
The Game (Game of the Year) with 5 add ons is currently 86% off Here

