When recording with OBS CBR is the best option as it gives you complete control over bitrate, and won’t put too much stress on your PC. When using NVENC you also have the ability to use CQP. CQP is the better choice if you want the highest quality video possible, however, this comes with the caveat of larger video files.

For CQP a lower CQ level will result in better recording quality. Typically you won’t want to go any lower than 15. However, when using CBR a higher Bitrate is better. Using a bitrate of 10,000 will typically be fine but on the lower quality side. Instead, a Birate of 16,000 or 20,000 can be used for 1080p recordings.