Last weekend I finally build my first SFF PC.
I used ASRock Z390 Phantom Gaming-ITX/ac motherboard, Intel i9 9900K CPU (yeah, I know - I'm crazy)), Noctua NH-L12S CPU Cooler and Corsair SF 600 80+ Platinum Certified PSU.
Noctua NH-L12S didn't fit :(
So I replaced it with Scythe...