I don't have a a very high end PC and I've heard using hardware encoding is much more efficient However the only encoding option I see on OBS is software x264. I tried installing this https://obsproject.com/forum/resources/amd-advanced-media-framework-encoder-plugin-for-obs-studio.427 but nothing changed. I'm using the latest version of OBS 21.1.0 on windows 8. My hardware is FX- 4130, Biostar - TA970, 8 GB DDR3 1866, and a 3GB Radeon 7950.