What is the limiting factor for AI scaling?

Q3832 answers2019-2026
Short answer

He cited a consensus estimate of at least a 15 GW power shortfall for AI chips in 2027.

From his 2026-09 answer in G20 Innovation Ministerial Summit — Remarks (North Carolina). Summary is ours; see the quotes below.

All 32 answers, oldest to newest

2019 · 1 answer
🎙 Interview · 2019-06 · E3 Coliseum · asked by Todd Howard / E3 Coliseum moderator · watch at 26:56 · transcript ·
He said all you needed a GPU for was to help the game look better, and those same GPUs ended up being very useful — a huge boost to AI. Better graphics to AI, and that same path is key to self-driving.
"those same GPUs ended up being very useful, huge boost to AI"
2022 · 1 answer
🎙 Interview · 2022-03 · Giga Berlin Opening · asked by Press · watch at 7:11 · transcript ·
He said two to three years out, total gigawatt hours of battery production will be the limiting factor.
"if you start going like two, three years out, it's all about total how many gigawatt hours of battery are produced, that will be the limiting factor."
2023 · 5 answers
🎙 Interview · 2023-04-19 · Tesla Q1 2023 earnings call (2023) · asked by Tesla Investor Relations · watch at 10:58 · transcript ·
He says Dojo could become a sellable service like Amazon Web Services.
"Dojo also has the potential to become a sellable service"
🎙 Interview · 2023-04-19 · Tesla Q1 2023 earnings call (2023) · asked by Tesla Investor Relations · watch at 10:51 · transcript ·
He says Tesla buys Nvidia GPUs while pursuing Dojo for an order-of-magnitude cut in training cost.
"Dojo, which we believe has the potential for an order of magnitude improvement in the cost of training."
🎙 Interview · 2023-07-14 · xAI launch X Spaces (2023) · asked by X Spaces host · watch at 18:58 · transcript ·
He says a lot of AI is data curation, with surprisingly few lines of code.
"A lot of AI is data curation. It's like shocking. It's not like vast numbers of lines of code."
🎙 Interview · 2023-07-14 · xAI launch X Spaces (2023) · asked by X Spaces host · watch at 29:52 · transcript ·
In July 2023 he predicted a shift from a silicon shortage to a voltage-transformer shortage in about a year and an electricity shortage in two years.
"My prediction is that we will go from an extreme silicon shortage today to probably voltage transformer shortage in about a year and then an electricity shortage a year in two years."
🎙 Interview · 2023-07-14 · xAI launch X Spaces (2023) · asked by X Spaces host · watch at 30:23 · transcript ·
He says the most important metric in a few years will be useful compute per unit of energy.
"the metric that will be most important in a few years is useful compute per unit of energy."
2024 · 7 answers
𝕏 post · 2024-03-18 · @elonmusk on X · asked by @DrJimFan · open post ·
He said the rate of change of the ratio of digital to biological compute is hyper exponential
"The rate of change of the ratio of digital to biological compute is hyper exponential"
🎙 Interview · 2024-04-23 · Tesla Q1 2024 earnings call (2024) · asked by Tesla Investor Relations · watch at 24:47 · transcript ·
He notes it is pretty hard to put together 100 gigawatts of AI compute.
"It's pretty hard to put together 100 gigawatts of AI compute."
𝕏 post · 2024-06-02 · @elonmusk on X · asked by @AravSrinivas · open post ·
Asked Who’s likely to build the first 1 million H100 GPUs (equivalent) data center, he said given the pace of technology improvement, it’s not worth sinking 1GW of power into H100s. The @xAI 100k H100 liquid-cooled training cluster will be online in a few months. Next big step would probably be ~300k B200s w...
"Given the pace of technology improvement, it’s not worth sinking 1GW of power into H100s. The @xAI 100k H100 liquid-cooled training cluster will be online in a few months. Next big step would probably be ~300k B200s with CX8 networking next summer."
𝕏 post · 2024-07-22 · @elonmusk on X · open post ·
He said nice work by @xAI team, @X team, @Nvidia & supporting companies getting Memphis Supercluster training started at ~4:20am local time. With 100k liquid-cooled H100s on a single RDMA fabric, it’s the most powerful AI tra...
"Nice work by @xAI team, @X team, @Nvidia & supporting companies getting Memphis Supercluster training started at ~4:20am local time. With 100k liquid-cooled H100s on a single RDMA fabric, it’s the most powerful AI training cluster in the world!"
🎙 Interview · 2024-07-23 · Tesla Q2 2024 earnings call (2024) · asked by Tesla Investor Relations · watch at 21:51 · transcript ·
He says he is quite concerned about getting state-of-the-art Nvidia GPUs when needed, hence doubling down on Dojo.
"I'm quite concerned about actually being able to get state of the art Nvidia GPUs when we want them."
🎙 Interview · 2024-07-23 · Tesla Q2 2024 earnings call (2024) · asked by Tesla Investor Relations · watch at 22:11 · transcript ·
He says Tesla will double down on Dojo and sees a path to compete with Nvidia.
"we are going to double down on Dojo and we do see a path to being competitive with Nvidia"
𝕏 post · 2024-09-02 · @elonmusk on X · open post ·
He said this weekend, the @xAI team brought our Colossus 100k H100 training cluster online. From start to finish, it was done in 122 days. Colossus is the most powerful AI training system in the world. Moreover, it will doubl...
"This weekend, the @xAI team brought our Colossus 100k H100 training cluster online. From start to finish, it was done in 122 days. Colossus is the most powerful AI training system in the world. Moreover, it will double in size to 200k (50k H200s) in a few months. Excellent work by the team, Nvidia and our many partners/suppliers."
2025 · 11 answers
🎙 Interview · 2025-01-29 · Tesla Q4 and full year 2024 earnings call (2025) · asked by Tesla Investor Relations · watch at 14:16 · transcript ·
He says Optimus will ultimately need at least 10 times the training compute of the car.
"the training needs for Optimus, for Optimus humanoid robot are probably at least ultimately 10x what's needed for the car"
𝕏 post · 2025-05-20 · @elonmusk on X · open post ·
He said colossus 2 will be the first Gigawatt AI training supercluster
"Colossus 2 will be the first Gigawatt AI training supercluster"
𝕏 post · 2025-07-22 · @elonmusk on X · open post ·
He said 230k GPUs including 30k GB200s are operational for training Grok in Colossus 1, and Colossus 2’s first batch of 550k GB200s and GB300s starts going online in a few weeks.
"230k GPUs, including 30k GB200s, are operational for training Grok @xAI in a single supercluster called Colossus 1 (inference is done by our cloud providers). At Colossus 2, the first batch of 550k GB200s & GB300s, also for training, start going online in a few weeks. As Jensen Huang has stated, @xAI is unmatched in speed. It’s not even close."
𝕏 post · 2025-08-22 · @elonmusk on X · open post ·
He said Colossus 2, built by xAI, will be the world’s first gigawatt-plus AI training supercomputer.
"Colossus 2, built by @xAI, will be the world’s first Gigawatt+ AI training supercomputer"
🎙 Interview · 2025-09 · Elon Musk on DOGE, Optimus, Starlink Smartphones, Evolving with AI, Why the West is Imploding | All-In Summit 2025 · asked by All-In hosts (live, All-In Summit) · watch at 29:49 · transcript ·
He treats intelligence vs compute as roughly logarithmic: as a rule of thumb, 10× more compute might double intelligence, which is still a jump from IQ 100 to 200. He expects scaling to continue until most of the Sun's power, then the galaxy's, is used for compute.
"say for argument sake like 10x more compute will double the intelligence"
𝕏 post · 2025-09-17 · @elonmusk on X · open post ·
He said Colossus II is the world's first gigawatt AI training cluster.
"Colossus II, the world’s first Gigawatt AI training cluster"
𝕏 post · 2025-09-19 · @elonmusk on X · open post ·
He said xAI has 1.21 gigawatts of training compute, actually slightly more.
"1.21 Gigawatts of training compute! (Actually, slightly more)"
𝕏 post · 2025-09-23 · @elonmusk on X · asked by @techdevnotes · open post ·
He said xAI will be first to a gigawatt of coherent training compute and also first to 10 GW, 100 GW and 1 TW.
"Just as we will be the first to bring a Gigawatt of coherent training compute online, we will also be the first to 10GW, 100GW, 1TW, …"
🎙 Interview · 2025-11 · Ron Baron and Elon Musk Discuss the Future · asked by Ron Baron · watch at 50:11 · transcript ·
He respects TSMC and Samsung and uses both, but from their standpoint they are already moving like lightning — five years to a new fab is infinity to him, so chips would otherwise limit Optimus and self-driving.
"five years to get to blind production. I'm like five years to me is infinity"
𝕏 post · 2025-12-24 · @elonmusk on X · open post ·
He said xAI will have more AI compute than everyone else combined in less than 5 years.
"xAI will have more AI compute than everyone else combined in <5 years"
𝕏 post · 2025-12-30 · @elonmusk on X · open post ·
He said xAI bought a third building called MACROHARDRR that will take training compute to almost 2 GW.
"xAI has bought a third building called MACROHARDRR. Will take @xAI training compute to almost 2GW. Try @Grok. Download latest app."
2026 · 7 answers
🎙 Interview · 2026-01 · Conversation with Elon Musk | World Economic Forum Annual Meeting 2026 · asked by Larry Fink · watch at 16:54 · transcript ·
The limiting factor for AI deployment is electrical power. Chip production is rising exponentially while electricity is only ~3-4%/year, so later this year we may make more chips than we can turn on, except in China.
"limiting factor for um AI deployment is fundamentally electrical power"
🎙 Interview · 2026-01 · Elon Musk on AGI Timeline, US vs China, Job Markets, Clean Energy & Humanoid Robots | 220 · asked by Peter Diamandis · watch at 1:47:08 · transcript ·
Electricity generation is the innermost-loop limiting factor, along with transformers and cooling. He said that remains the limit for at least the next two years, until humanoid robots can help build power and cooling.
"it's basically electricity generation and cooling um are limiting factors for AI"
𝕏 post · 2026-01-17 · @elonmusk on X · open post ·
He said Colossus 2 for Grok is operational — the first gigawatt training cluster — upgrading to 1.5 GW in April.
"The Colossus 2 supercomputer for @Grok is now operational. First Gigawatt training cluster in the world. Upgrades to 1.5GW in April."
🎙 Interview · 2026-02 · Elon Musk – "In 36 months, the cheapest place to put AI will be space" · asked by Dwarkesh Patel (with co-hosts) · watch at 2:45:30 · transcript ·
Energy within a year, chips in three to four years.
"In the one year timeframe, it's energy"
🎙 Interview · 2026-06 · SpaceX Elon Musk Technical Talk on manufacturing, launch and AI satellites at scale (June 8th, 2026) · asked by SpaceX technical talk host · watch at 8:32 · transcript ·
Three things: large mass-to-orbit (Starship), a lot of solar power and radiators, and a lot of AI chips. He says they ultimately need to send millions of tons to orbit and toward a terawatt of solar and chips.
"the three things on you need are mass to orbit, lot of solar power, and and radiators"
🎙 Interview · 2026-07 · Tesla Q2 2026 earnings call · asked by Dan (Barclays) · watch at 1:06:51 · transcript ·
He said power is a major issue for turning on AI computers. Hyperscalers struggle to find power and to smooth training-run swings of as much as 70% in 100 milliseconds, which is why SpaceX bought Megapacks for its data centers.
"power constraints are going to be, they really are a major issue for AI"
🎙 Interview · 2026-09 · G20 Innovation Ministerial Summit — Remarks (North Carolina) · asked by G20 Innovation Ministerial Summit · watch at 11:07 · transcript ·
He cited a consensus estimate of at least a 15 GW power shortfall for AI chips in 2027.
"there will be at least a, a 15 gigawatt shortfall of power in 2027 for AI chips"

Last updated: 2026-09 (newest answer).

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