I am having a low performance with my xfx RX 580 8gb in VR. Project cars 2 is no more than 40 FPS, I have the latest version of Radeon 20.2.2, I have already made all the necessary changes and will not. My CPU is a Ryzen 5 2600 with 16 ram.
I use the Oculus Rift S, and always access games via SteamVR windows, open directly through Oculus from the very audio bug. And updates are up to date. I use Afterburne and the Radeon system itself to analyze and I can leave all graphics at a minimum of 40 FPS.
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Not sure if the Oculus VR software is needed to be installed or not.