What should i upgrade to

Currently running a

i9-13900k

64 Gigs Ddr5

Amd 7900xtx

Asus Rog Z790

Built this pc a few years ago now and my motherboard won’t work with 2 sticks of ram any more and asus wont warranty it.. don’t really care to keep fighting it so i’ve been stuck on if its worth it right now to upgrade my motherboard and cpu (and to what) or if i just buy another z790 board.

Thanks!