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HBM is the bottleneck, not GPUs

High-bandwidth memory is the real constraint on AI compute. Here's the supply map.

Silicon & Signal
June 22, 2026 9 min read

The market keeps counting GPUs. The actual ceiling on AI buildout is high-bandwidth memory, and the supply curve there is far steeper than consensus models assume.

NVDA — live

Three suppliers, one constraint

Capacity is concentrated, qualification cycles are long, and the packaging step is its own separate bottleneck.

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