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[return to "xAI joins SpaceX"]
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1. jopsen+X4[view] [source] 2026-02-02 22:08:43
>>g-mork+(OP)
> In the long term, space-based AI is obviously the only way to scale.

I never questioned it.

Space is also extremely cold, and if it's as dense as Musk cooling won't be an issue.

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2. AceJoh+66[view] [source] 2026-02-02 22:12:42
>>jopsen+X4
I can't tell how many layers of sarcasm are here, but I just want to highlight that aktshually cooling in space is quite difficult because there is no convection, so the only cooling option is radiative. Which gets a bit hard when the satellite gets blasted by the sun.

The ISS doesn't have problems staying warm, it has problems cooling off.

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3. jopsen+w8[view] [source] 2026-02-02 22:21:56
>>AceJoh+66
> the only cooling option is radiative.

It does say he's planning an AI sun, I'm guessing that's the temperature you need to run at for radiation to work.

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4. pantal+q9[view] [source] 2026-02-02 22:25:20
>>jopsen+w8
There are already large communication satellites that consume several kW of power.
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5. FireBe+wb[view] [source] 2026-02-02 22:32:15
>>pantal+q9
Oh, good. So we only need to multiply that by 200 million times, per space datacenter.
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6. pantal+ic[view] [source] 2026-02-02 22:34:25
>>FireBe+wb
The data center would still consist of many individual satellites, much like a earth based data center consists of many individual servers
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7. Bootvi+zd[view] [source] 2026-02-02 22:38:09
>>pantal+ic
A large telecommunications satellite operates at about 15kW. A Blackwell GPU consumes 1kW so you would be at 15 Blackwells per satellite. The cooling surface needs to scale linearly so there is little return to scale.

This doesn't sound like a good idea to me.

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