It is very likely that the HDMI port of the DeskMeet X300 is only HDMI 2.0, not 2.1. This is because no AM4 APU supports HDMI 2.1 - neither the Ryzen 5 4650G Pro nor the 5600G or other APU models on this platform. The HDMI controller is integrated directly into the APU. The mainboard (DeskMeet X300) does not extend the HDMI functionality, but only passes it through. Tools such as CRU (Custom Resolution Utility) also show that the active output is recognised as HDMI 2.0.

No, I didn't dare. The space for the cooler is rather cramped and WaKü plus dedicated GPU is not really an option with this case. The power supply is also rather weak (although I think it should be possible to replace it with a better one) For info, I have an RX6600 with Ryzen 5500 running in it.

Already figured it out thanks:)

Thank you for your advice. According to our information, a 500W 80 Plus Bronze power supply unit should be included here.