Z97-A has a physical TPM header, so you'd need to buy a module and install it there. That said, if you're thinking about Windows 11, you may still be out of luck because ASUS never updated that board's BIOS to support TPM 2.0. You'd be able to activate TPM 1.2 at most.
Only a few select older boards, like Sabertooth Z87, received an updated BIOS for TPM 2.0 (ASUS TPM-L module). Sadly, my Maximus VI Formula also did not get the update.
