Soldato
Came across this thread on reddit which pointed to a 'fix' for the above issue: https://www.reddit.com/r/nvidia/comments/kbtuec/possible_cyberpunk_2077_on_amd_cpus_performance/
I tested hex editing the executable and it does cause the load to be spread across all cores instead of mostly on real cores though performance seemed the same in the brief test. Perhaps it would make more of a difference on older gen ryzen chips compared to this 5800X ?
Before:
After hex edit
1st line below D3D12 is t0 core usage percents , 2nd line below t1 cores.
5600x seems to be having issues, probably down to the load being mainly on just 6 cores v 8 on the 5800X. Be interesting to see of it boosts the 5600x up.