I love all the breathless stories about data centers in space that seem to forget the biggest problem with launching compute.

You have to read to the very last paragraph of this Payload article to learn that they still haven’t overturned thermodynamics:

Of course, in space there’s no conduction, there’s no convection, there’s just radiation, and so we have to figure out how to cool these systems out in space but we’ve got lots of great engineers working on it.

Earlier, the article claims both “low-SWaP” and also 25x the performance of the H100.

And, presumably, no cooling necessary.