My 2020 Mac Mini Graphics Card has trouble rendering a video game

Hi, Albatr0ss1, here are the specs for your 2020 Mac Mini, which I think is an M1 (Apple silicon)

Mac mini (M1, 2020) - Technical specifications (CA)....no, not really, there aren't any efficient solutions to this problem....m1 Macs don't support eGPU's at all. although they probably have a Thunderbolt 3 socket on them, for eGPU support, it needs to have an Intel Processor in it, and the 2020 Mac Mini has Apple Silicon (M1) system on a chip...which really cannot be changed or added to at all, even the RAM is soldered in and the SSD.... so, you have what you have....which video game? maybe there's an M1/more compatible version of it out there...maybe ask at the game maker's website (under "Support" or "Forums"

As Johnb-one suggests, I too feel only the game developer can advise you. You cannot upgrade any hardware inside a Mac Mini 2020.

If you you need help interpreting their system requirements, maybe we can assist you and suggest options, if any, if you tell us the game title and its developer.

It is possible the developer has not yet released a game version that is optimized for Apple Silicon models. Older games may require running under Rosetta 2 emulation, and any emulation can slow performance.