Silicon & Hardware · Week of October 20, 2026
Memory and power become the binding constraints of the AI buildout
- Memory Becomes the Binding Constraint as Profit Pool Shifts to HBM MakersThree days' worth of DRAM on hand at the two companies that make most of the world's memory. That is the number KB Securities put on Samsung and SK Hynix in the third quarter — inventories below ten days, a condition res…
- Nvidia co-designs custom HBM, routing Samsung, SK Hynix and Micron through TSMC's 3nmSamsung Electronics is the only company on earth that fabricates both the DRAM core dies and the logic base die inside its own high-bandwidth memory stack. As of last week, it agreed to stop doing that for its largest cu…
- Electrical equipment lead times and supply chains, not chips, delay US data centersArticle — "Power and supply chains, not chips, are delaying nearly half of planned US data centers": In the red dirt of Abilene, Texas, more than 6,000 workers move around on electric buggies, day and night, building eig…
- Cloud capex hits $957bn as memory price inflation, not demand, drives the surgeTwenty billion dollars is a powerful incentive. That is the amount by which Amazon raised its 2026 capital expenditure estimate, from $200 billion to $220 billion, and the company explicitly identified the rising cost of…
- Micron's $250bn Clay Fab Bets DRAM Can Be Onshored at ScaleOn July 9, 2026, Micron poured first concrete at its Clay, New York megafab — more than a full quarter ahead of the original plan, and less than six months after breaking ground in January.
Threads we are following
- Whether regulators treat Nvidia's $279 billion in long-term HBM commitments as a strategic lock-up or an antitrust concern.
- Whether Samsung Foundry will qualify its own 4nm base die for NVHBM if TSMC's 3nm allocation hits a ceiling, and whether Nvidia would accept a second base-die source.
- Whether transformer order books begin clearing faster than interconnection queues, which would signal the grid constraint is easing.
- Whether Citi's call that DRAM and NAND prices peak in Q2 2027 proves right, or Goldman's view that the memory shortfall widens through 2028.
- Whether the $6.1bn CHIPS award and New York's incentive package survive the 2026 midterms and subsequent appropriations cycles through 2035
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