I have an ASUS KCMA-D8 motherboard with two Socket C32 CPU sockets. Only one is used right now. Can if put a different (better) CPU in the other socket and have the motherboard use both? Or do motherboards with two CPU sockets require that both CPUs be identical?
I guess you technically CAN do this... but it's just not a good idea.
I'd plan for equally-spec'd CPUs if you ever need to upgrade.