As we have already indicated, the B660 chipset does not allow overclocking processors, even non-K. Also, and even if the bios allows to indicate a ratio different from the original one, it is only applied on a single heart. We tested with our i6-12600K, on the P-Core side, the maximum ratio is 49. But whatever happens, the frequency is stuck at 4500 MHz for the P-Core and 3400 MHz for the E-Core.
Read more @ Pause Hardware (French)