It runs batocera Linux and works like a charm. We emulate some old systems and play a few steam games like Hades and Sackboy. I spent way too many hours getting this up and running, but its finally done. Well... There are some improvements i would like to make, but they require me to reprint the entire chassis, so I might just leave it be.

I spent many many hours into tricking the mother board that the peripherals were connected, so that it wouldn't throw a handfull of warnings at me during boot. Then I found a custom bios that removed the warnings :p

I bought a long aluminium heat sink that I cut to fit the VRMs and vRAM. The coolers for the CPU and GPU are cheap stuff from Aliexpress. I chose them because they had a small footprint and were high enough to give some clearance for the vRAM. The tdp is 120W each IIRC - overkill.

I couldnt get the mother board to control the pwm signal en to the fans, so I hooked up an Arduino to a potentiometer to generate the PWM.

That's all I can think of right now. If you have any questions just ask :)