Waiting to see your new version benchmark runWell I'm not a Linux user, but I know for sure that under Windows picture differs a lot to that (this is the prior benchmark version though, I'll run later the current version but I highly doubt things change):
On average, 5950X is 18% faster (consuming clearly less power than 12900K)
Also, are you using DDR4 or DDR5 with 12900K? What speed and timings?
If you have a spare SSD, maybe you could run these benchmarks on Clear Linux?