[roryirvine]

Those temperatures aren't necessarily a problem for the chips (there are some minor design changes needed, so it's more a question of having enough volume to justify doing it). The real issue is that this is yet another thing you could do better on earth.

In other words, run fully lights-out datacentres that no humans will access during normal operation - this allows you create more extreme temperature gradients and to replace the atmosphere with CO2 (or even He2), both of which will make your cooling solution much more efficient as well as increasing rack density and perhaps even taking the place of a fire suppression system.

The reason that no-one's actually doing that at scale is that it's currently significantly more expensive than traditional datacentre designs. And yet, that's still much less expensive than boosting racks into space and then letting them burn up in the atmosphere five years later.