confidential cpus are typically engineering samples, usually given to motherboard companies to work on bioses for the cpu generation and meant to be returned to the company after done. engeering sample cpus can be missing features, lower clocks and such that the retail varient may have.

as for geneeation of cpu, its easier to find out via what motherboard socket it is

on thecontext of finding second hand, i wouldnt say its common, but can happen. some chinese companies sell dirt cheap ES cpus for basic computing.

the ilm says lga 115x, so its either 1156(1st gen), 1155(2nd or 3rd gen), 1150(4th and 5th gen) or 1151(6th to 8th gen)

arms not ready yet for gaming. id expect at least 1 more generation of x86 hardware. especially if AMDs 1W optimized efficiency cores end up becoming an option.

so the most populous states, and somehow, 2 in the bottom 5.