PCIE 4.0 is supported on some Motherboards I think.
This is a bit fuzzy on all the documentation out there
The Intel Chipset 490 is PCIE 3.0
BUT the Comet Lake CPU does not.
The Rocket Lake cpu will support 4.0
So you could build and swap out CPU's later I suppose.
That may end up being my plan as my PC is now 7-8 years old.
Still runs great but really ready for serious upgrade as I have several
projects I would like to do but really need the added improvement of cores and threads.
I am also hoping to see Intel XE DG2's listed soon as interested in that for the upgrade
as well