On Dreame robot vacuums you can actually flash your own firmware like Valetudo which is also quite popular in Home Assistant peers since it no longer phones home

I’m using an Odroid H3 with an Intel N5105 and you actually get a fan if you buy one of the bigger official Odroid Cases
which I set in the Bios settings to start at higher temperatures

so far the loudest noise is the HDD while the fan basically just runs as fallback if needed but even transcoding 4K HDR HEVC content on Jellyfin doesn’t raise the SoC temperature to above 70° C (passive cooled)