I run a G2 with a 6800XT which is pretty much identical performance to a 3080 so I am happy to share my settings.
1. I use CSP version 0.2.5-preview1
2. I use the latest Pure
3. I use LCS not Gamma (that is automatically selected if you load in my settings file below)
4. I don't use SteamVR I use OpenXR -
https://mbucchia.github.io/OpenXR-Toolkit/
In-car OpenXR toolkit settings
Performance Mode -
CAS On
CAS 70%
Turbo Mode On
Appearance -
Post Processing Off
System Override Resolution Yes - (2837x2763 gives me solid 90fps driving hot lap Ferrari GTO at Brands Hatch GP at noon)
Motion Reprojection Off
Here are my other settings - NOTE: I have Anisotropic Filtering forced on at x16 in my GPU software
View attachment 1409570
Click on this to import my CSP settings if you wish
VR Sim Racer has shared latest Custom Shaders Patch settings
acstuff.ru
and manually edit the Settings-Assetto Corsa-Video as per the image above
I don't claim to have the best settings and rather drive than spend endless hours tinkering with them but I hope this helps.
If not get back to us.
VR Sim Racer