[runako]

Could you build a data center in space? Yes, absolutely I am sure there are no physical barriers. We have computers in space now, and those computers have telecom links to Earth.

Without even going into the numbers, terrestrial data centers have significant cost advantages. They don't have to spend $$$$$$$ to get to orbit. They can upgrade and/or fix components easily (likely safe to assume a hypothetical orbital DC would plan to never replace anything). They don't have to pay for the full capex of their power generation facilities. Lower-latency Internet. Heat dissipation is a (possibly unsolved?) problem. For every input cost to a data center, moving it to orbit massively increases that cost.

From a pure engineering standpoint: orbital data centers are not optimized to solve any common problem faced by data center operators or users. Permitting can get difficult in parts of the US, but at least permitting is a solved problem.

[sakagami0]

If you think launching a rack costs 100k, I think you need to continue your napkin math or youre not being true to yourself.

A GB300 costs about 70k, a rack is 72 of them.

The cost to launch is less than 2% overhead. Its is extremely feasible.

[ericd]

I think you're understating the permitting problem - it's a major reason for the very large/rapid price hikes on power in the PJM region, and the populist backlash against data center construction, including moratoriums on DC construction. The difficulty in getting new electrical generation interconnected in many parts of the US is one of the major marks in favor of the plan.

[runako]

I'm not understating it. But I'm not buying the line that suddenly it's impossible to build industrial buildings in the US. I am realizing that there are thousands of jurisdictions in the US with wildly different permitting regimes, and then hundreds of other countries in the world that might be more welcoming.

But let's say they need to stay in the US. Are DC operators offering to buy down utility capex costs so that existing residents don't see a spike in rates? If not, obviously that is going to create opposition as nobody wants their utility bills to rise rapidly. It would probably be cheaper & easier to e.g. write a check to Southern Company to prevent rate hikes directly tied to their DC than to put a DC in space.

The math also barely pencils? IF Starship hits its $100/kg, getting a single rack of servers to orbit will cost ~$100k. A 500MW data center might have ~5k racks, so ~$500m to orbit. SpaceX estimates $100/kg - $300/kg so it could be $1.5B - $2B just to put the racks in orbit, plus the cost of the servers, plus the cost of the actual orbital data center itself, plus the cost of getting the orbital data center to orbit. That's getting into the "hand every resident a check for $100k in exchange for their county approving the permit" territory.

[ericd]

One Vera Rubin rack costs $3-7M and eats something like 600 kw, so you’re probably looking at more like 800 racks for that 500 MW DC. $100k launch costs per rack doesn’t seem too terrible if that’s what it works out to. I’m sure there’s a mountain of solar panels that aren’t included, though?

And it’s not that simple, building out power generation is very constrained, the interconnection queue is years long in many places, and the current backlog for new natural gas turbines is multiple years right now. Fixing the permitting isn’t impossible with some political will, but energy permitting reform is something that’s been bandied around for years in Congress and hasn’t made it across the finish line. EPRA almost made it at the end of last Congress but that session ended before it did. Hopefully it makes it this time, everyone should contact their congresspeople and ask them to support energy permitting reform.

[muskstinks]

You will have a setup working based on solar energy and battery storage before you get spaceship to not explode anymore and to deliver low price for payload.

And we are talking about AI Datacenters, they are a lot less latency dependend than websites.

Alone the idea that Musk would be able to break through any burocrazy for space stuff and sets up a supply chain for everything space is easier than just setting up some energy and fiber, feels ridicoulys

[runako]

I don't understand how years spent building an orbital DC is better than years spent permitting. I guess maybe they expect to somehow be able to build these faster? (How?)

Anyway, is it technically possible? Yes. My suspicion is it's at best a wash vs building on the ground. Applying a similar price premium & similar engineering resources to a ground-based system is likely to deliver much more predictable results.

Tech obviously can have success at lobbying. The TikTok ban IIRC got 90 votes in the Senate. I'm sure the total cost of the required astroturf campaign was much less than launching a single orbital DC.

[ericd]

Yeah, true, they have gotten pretty good at lobbying. Hoping they can beat the utility lobbies to really open up renewable energy development.