Radiation cooling is pretty dramatic in space. With an isolated radiation shield/mirror from the sun and a decent sized heatsink, you can have a lot of cooling

Radiation cooling is pretty dramatic in space. With an isolated radiation shield/mirror from the sun and a decent sized heatsink, you can have a lot of cooling power on hand. A server isn't going to be pumping out nearly as much heat as a rocket engine, and launch vehicles don't tend to overheat.