Game performance is fine. It is the desktop performance that’s the issue.

https://github.com/NVIDIA/open-gpu-kernel-modules/issues/538 https://github.com/NVIDIA/open-gpu-kernel-modules/issues/693 https://github.com/NVIDIA/open-gpu-kernel-modules/issues/777

I would not recommend going to the open ones just yet. There are major performance issues with the GSP firmware. You can disable it on the proprietary modules but you can not do so on the open modules since they rely on it for functionality.