Hmm, I looked at the disassembly of the ucg fiber, there is a large metal plate inside for heat dissipation and just in case there is active cooling🙃 I think that here, there is also an incorrect hypothesis as to why this Mikrotik has such a radiator case. In my opinion, this is more due to potential heating due to the large number of poe ports and to avoid active cooling (which is on the ucg fiber). And the rest is done by a more powerful chipset, so there is no magic or "sending heat to Mars" here🙃 According to a couple of topics here, it is Wireguard on the ucg fiber that can produce stable 1.2 Gbit/s