https://wccftech.com/heres-how-to-tell-between-an-avx-512-non-avx-512-supporting-intel-alder-lake-desktop-cpu/

AVX512 support on Intel Alder Lake CPUs was a considerable gamechanger for the company, but not in how the company intended for it to be. The series was released with the option to instruct users to activate the AVX512 option on applicable CPUs to allow for overclocking.

Intel did not intend for users to create workarounds to access the capability to stress the Alder Lake processors, so the company locked the option from users, stressing that anyone accessing the AVX512 process would void their warranty. Now, the company has a way to tell the difference between the intended AVX512 compatible Alder Lake CPUs and locked processors from the company.