Comment by dgoldstein0

Cooling.

Radiative cooling is the only option, and it basically sucks vs any option you could use on earth.

Second, ai chips have a fixed economic life beyond which you want to replace them with better chips because the cost of running them starts to outpaxe the profit they can generate. This is probably like 2-3 years but the math of doing this in space may be very different. But you can't upgrade space based data centers nearly as easily as a terrestrial data center.