Smallest possible mini-itx build

It seems z590 and z690 are the only chipsets that can handle thunderbolt 4.

Since z690i unify have only a single m.2 slot, it be better to have bigger capacity for system storage.

For the Case, if it goes for a internal GPU, Skyreach 4 mini seems the best option so far.

For the external GPU, it seems it could have more option but Skyreach 4 TINY looks good.

Check out Not From Concentrate and Optinium Tech Youtube channels for good reference of tiny PC build.

Edit(3.12) As long as I can accept the look and using Intel CPUs, Intel Dragon Canyon NUC 12 barebone is the absolute best option. It's not that thinner than S4 Mini but comes with 3 thunderbolt 4 port.