This comparison is not mine, and its excellent: https://giannirosato.com/blog/post/nvenc-v-qsv/ https://giannirosato.com/blog/post/nvenc-v-qsv/ x264 used the

This comparison is not mine, and its excellent: https://giannirosato.com/blog/post/nvenc-v-qsv/ https://giannirosato.com/blog/post/nvenc-v-qsv/ x264 used the medium 10 bit preset, which is a bit of an oddball because 10 bit AVC is "unofficial," and many hardware decoders don't support it.