Hello! I have a very similar build. Motherboard is Gigabyte Z390 UD but rest is basically the same. i9 9900K, Gigabyte RX VEGA 64, 32GB G.Skill RAM, Corsair SATA SSD 500GB and Samsung 970 M.2 SSD. I still have some serious issue with random freeze. After booting to the Desktop, it sometimes works for half an hour and sometimes just freezes in couple of minutes. I have tried different .efi memory fixes one at a time but with no luck so far. Does anyone have an idea what could it be? I probably should link some config or debug files to the post, but I'm not really sure what files would point to the issue.