GPUs in Space - a simulation

Recently, large datacenters in space have been proposed. See Starcloud, Axiom, Thales Alenia, Google Suncatcher, SpaceX.

Aside from the launch cost and many other challenges, one principal question is:

How doe s GPU, producing significant amounts of heat, get rid of thermal energy? And even the solar panels, with efficiencies of around 30%, turining 70% of all incoming energy into thermal - how do they?

This project should do the calculations as well as build a small demonstrator - a source of thermal energy, potentially a real GPU (we have various small Nvidia EdgeAI devices to burn …), to be deployed in a Mars simulator vacuum tank.