Cyberpunk 2077 isn’t running to its full potential on AMD processors, or at least that’s the case going by a good deal of online feedback.

VideoCardz unearthed a report on Reddit into the issue, which appears to revolve around SMT not working – that’s simultaneous multi-threading, and the apparent bug means that AMD CPUs are only using their physical cores, rather than the full amount of threads available to them.

So for example, with a Ryzen 3700X, that’s an 8-core processor but with 16-threads, meaning that if the physical 8-cores aren’t being fully utilized, you can effectively have more cores (‘virtual cores’ as it were) with simultaneous multi-threading (up to 16) – and therefore better performance.
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https://www.techradar.com/news/cyberpunk-2077-is-reportedly-underperforming-with-some-amd-ryzen-cpus