Comment by Aurornis

Comparing CPUs by clock speed doesn’t work. New CPUs are do more work per clock cycle.

A 9800X3D is twice as fast as your 9900K in benchmarks like GeekBench, despite having similar clock speed and the same core count.

If you could downclock the AMD part to 2.5GHz as an experiment it would still beat your 5GHz 9900K.