My next project is based on the platform ASRock DeskMini X300. I have been planning the implementation for a long time.The temperature in the test (CR23=30 min) became 69*C versus 91*C with Noctua NH-L9a-AM4/

The main stand:
• Mobo: ASRock X300M-STX
• CPU: AMD Ryzen 5 4650G
• Liquid colling custom: AlphaCool + EKWB
• RAM: Kingston HyperX Impact SO-DIMM @4000MHz 16Gb (2 x 8)
• VGA iGPU: AMD Radeon Vega 7
• SSD: Team T-Force Cardea Zero Z440 1Tb
• PSU: Rgeek LD120180
• Case: custom 3D

I have written a full review with the stages of creation. Who is interested: https://club.dns-shop.ru/blog/t-325-sborka-computera/73851-lichnyii-opyit-kastom-na-baze-asrock-deskmini-x300-korpus-print/