- Essays··10 min read
The Specification You Can Download Is Not the System You Can Buy
A ratified specification is not a commissioned cluster. UALink 2.0 promises 1,024-accelerator pods at half the TCO of NVSwitch, but evaluation hardware is not expected until late 2026, and your purchase order is due in August. The more productive question for enterprise finance is whether InfiniBand or Ethernet closes your deployment faster than a roadmap that has not yet touched silicon.
ai-infrastructuregpu-clustersinterconnectdata-centre-networkingRead - Essays··9 min read
$130 Billion in Projects Shelved: How Water Panic Broke the U.S. Datacenter Boom
More than $130 billion in U.S. datacenter projects was delayed or abandoned in Q1 2026, and water arrived before power as the binding constraint. Across more than 20 states, moratoriums and permitting overhauls have frozen roughly a third of the new-build pipeline. Closed-loop and immersion cooling can solve the problem; the capex delta means only hyperscalers are currently able to absorb it.
ai-infrastructuredatacenterwater-policyregulatory-riskRead - Essays··9 min read
China's exascale push against GPUs · what LineShine's interconnect says about post-NVLink fragmentation
LineShine, which debuted atop the June 2026 TOP500, is the first system to exceed two exaflops of sustained double-precision performance without GPU accelerators. It was built under US export controls from indigenous Arm processors, on-package HBM, and a custom fat-tree fabric called LingQi. The ranking is the least of it: China has closed the interconnect gap that sovereign exascale programmes could not paper over, and the scale-up fabric market is now genuinely fragmented.
supercomputinginterconnectai-infrastructurechina-techRead - Essays··7 min read
Short of Space or Power
Microsoft is sitting on roughly $80 billion of Azure orders it cannot fill. It has the demand and it can buy the chips. What it cannot get is power. The binding constraint on AI has quietly moved from the fab to the substation, and the hyperscalers' answer, becoming their own utility, is rational for them and corrosive for everyone else standing in the same interconnection queue.
ai-infrastructuredata-centresenergyhyperscalersRead - Essays··12 min read
Sunday Essay · The Substrate Bill Comes Due
For a decade the AI conversation was about the model; the substrate was a logistics problem handed to the cloud team. The last six weeks changed that. A rack that draws a quarter-megawatt, memory sold out before the GPU ships, grid connections you cannot procure inside an investment horizon, and an interconnect that quietly became a vendor product again. The bill has come due.
ai-infrastructuredata-centersnvidiapower-and-coolingRead - Essays··7 min read
2.5 billion gallons · the number Amazon still won't print
Amazon finally printed its water number, 2.5 billion gallons. But read the boundary before you read the figure: the water that matters most is the water nobody puts in the press release.
data-centre-watercorporate-disclosureai-infrastructuresustainability-accountingRead - Essays··7 min read
Brussels finally wrote sovereignty into a statute. The graveyard it's walking into is well-marked.
Brussels has finally written sovereignty into binding law, and the top rungs of CADA's ladder are built so a US-domiciled parent cannot reach them. The law will probably land. The timeline, on this institution's record, will slip badly.
digital-sovereigntycloud-acteu-regulationhyperscalersRead - Essays··7 min read
Copper ran out of road, and nvidia just bought the on-ramp to what's next
Two press releases, forty-eight hours apart, told you more about the next decade of AI infrastructure than any keynote. Copper ran out of road, and NVIDIA just bought the on-ramp to what comes next.
ai-infrastructureco-packaged-opticsnvlink-fusioninterconnectRead - Essays··7 min read
three acts, one substation: Brussels just promised to triple Europe's datacentres
Brussels promised to triple Europe's datacentres in five-to-seven years. That is a power problem dressed as a permitting problem, and the substation queue will decide whether any of it ships.
eu-tech-sovereigntydatacentre-capacitygrid-powerai-infrastructureRead - Essays··7 min read
Brussels wants to triple data centre capacity and asked you to switch off the dishwasher, on the same afternoon
Brussels filed two plans on the same afternoon that quietly cancel each other out: triple the data centres, and please switch off the dishwasher. It's a demand-management answer to a supply problem, dressed as industrial strategy.
data-centreseu-policygrid-capacityai-infrastructureRead - Essays··6 min read
Hedge Funds Are AI'maxxing · the Exit Door Is Getting Narrower
1,059 hedge funds have made a record, leveraged, one-directional bet on AI semiconductors. The underlying thesis is probably correct. But 'probably correct thesis' and 'good risk-adjusted trade at current positioning' are not the same sentence.
hedge-fund-crowdingai-infrastructuresemiconductor-concentrationleverage-riskRead