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What are the physics constraints holding back AI infrastructure? Meltem Demirors and Kelly Greer: "AI is basically just taking electrons from the ground and running them through GPUs, you get tokens out of your computer." "Power is the ultimate constraint, gigawatts of backlog to connect to the grid. How...

22,835 views • 3 months ago •via X (Twitter)

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Microsoft's Fairwater Wisconsin went live today, ahead of schedule. It's the world's most powerful AI data center. Hundreds of thousands of NVIDIA GB200 GPUs, wired to behave as a single computer. The physical build is biblical. 315 acres. 1.2 million square feet across three buildings. 26.5 million pounds of steel. 46.6 miles of foundation piles. 120 miles of underground cable. The storage wing alone runs the length of five football fields. Each rack holds 72 GPUs sharing 14 terabytes of pooled memory, pushing 865,000 tokens per second. One rack generates more text per second than you've written in your entire life. Fairwater holds thousands of racks. The speed of light became a real bottleneck. Cable lengths between racks were introducing latency that slowed training. Microsoft's fix was a two-story layout so racks sit directly above and below each other. We are now architecting around special relativity to train AI. The power numbers are where it gets surreal. Phase 1 pulls 400 megawatts. Full build-out approaches 900 megawatts. Roughly a nuclear reactor, feeding one computer. The grid draw equals 300,000 homes. Fairwater Wisconsin is only the first. Atlanta is already online. Norway and the UK are next. Microsoft is stringing them together over 120,000 miles of dedicated fiber into one AI superfactory with 2+ gigawatts of total capacity. The buildings outlast the chips. GB200 gets swapped for GB300, then Rubin. The cells are modular. Microsoft's real bet is on the real estate, the power hookups, and the fiber. AI progress is now gated by concrete and megawatts.

Aakash Gupta

382,823 views • 5 months ago

Eric Schmidt just told Congress the number that kills the AI race on Earth: 92 gigawatts of new power, and we can’t deliver it. Former Google CEO laid out math everyone’s ignoring. Average nuclear plant: 1.5 gigawatts. AI demand: 92 gigawatts. That’s 60+ new nuclear facilities needed now, not decades from now. Schmidt: “We need 92 gigawatts more power.” Not happening. Infrastructure doesn’t exist. Approval takes years. Grid physically can’t absorb it. We’re out of electricity. Schmidt investing in Relativity Space isn’t billionaire space hobby. He spotted the bottleneck killing everything and he’s building the only exit that works. Can’t build power plants on Earth fast enough? Move compute off Earth. Schmidt: “You see the problem.” AI doesn’t hit an algorithm wall or chip shortage. It hits power ceiling. The grid can’t deliver 92 gigawatts at the speed AI development demands. Physically impossible to build that capacity terrestrially in relevant timeframes. Not a grid problem. A location problem. Next phase of compute can’t happen on the surface. Period. Heat, power draw, infrastructure limits, all of it forces migration to orbit. Only place with unlimited energy and zero conflicts is space. Schmidt: “We’re running out of electricity.” Direct assessment from someone watching what’s actually being deployed. The gap separating what AI needs and what Earth can provide is unbridgeable at required speeds. Not technical constraints. Physical reality. His aerospace play isn’t exploration. It’s escape route from a grid approaching collapse under computational demand it was never designed to handle. Scaling AI to the levels every major company is planning requires abandoning the planet. Not eventually. Now. Because the alternative is power walls that stop everything regardless of algorithmic genius or hardware breakthroughs. Doesn’t matter how perfect your models are or how many chips you fabricate if you can’t turn them on. And Earth can’t generate power fast enough for what the next five years require. Space isn’t the ambitious choice anymore. It’s the only choice avoiding hard physics limits on how fast you can deploy power generation on a regulated planetary surface. The AI race doesn’t end when someone builds superior intelligence. It ends when they can’t power it while competitors in orbit operate without energy ceilings. And that’s not distant future. That’s the constraint arriving right now that nobody building exclusively on Earth has an answer for.

Dustin

160,358 views • 7 months ago

.Naval: Every human is a lottery ticket bet on the future of the species. One of the things that you really learn when you read David Deutsch’s theories and you authenticate them for yourself is you realize humans are universal explainers. That means everything that we know in the universe follows the laws of physics, and there’s no reason to believe otherwise. If you think otherwise, then please present your better theory that explains the world. If you can’t do that, then you have to go with the laws of physics. Well, the laws of physics are completely computable. They can fit inside a Turing machine or computer, and a computer can simulate the laws of physics with arbitrary accuracy, limited only by the specific power of that computer. If you increase the power of that computer, you can simulate them more accurately. So humans already simulate—in our minds we simulate—and through our computers we simulate the weather, we simulate quasars, we even simulate human systems. We simulate the economy. We simulate all kinds of things. So anything that can be understood, we can understand in our minds. This is something the AGI people get wrong when they talk about superintelligence. There is nothing out there that can understand something fundamentally that we can’t understand. It might be faster at it, it might have more compute, it might have more memory, but there’s no concept that it can understand that we can’t ourselves understand. So we are maximal universal explainers. That means every human is capable of unbounded creativity. Anyone could be the next Einstein or Fermi or Elon Musk or Jeff Bezos or Jonas Salk or whatever. So we can create anything. And if we can create anything, every human is a lottery ticket bet on the future of the species.

Arjun Khemani

33,110 views • 1 year ago