Hi all,
suggestion please.

Budget 3-4k. the lower the better
I just need 3 more items as I just got CPU(intel i7-8700K)
and recycled old HDD/SDD and PSU (Silverstone 600W).
Purposes: GAMING ofcourse, and a little bit of programming (thinking of better RAM; 16GB at least?) and thinking of upgrading in the future

Mobo:
RAM:
GPU:

Thanks guys.