Theses›Datacentre & AI compute›Datacentre scale-out

Datacentre scale-out

Scale-out pulls three enabling layers at once; the durable value is in the layers, not the buildout

  • Closing
  • $235B by 2035

The call, a draftScale-out keeps optical interconnect, cooling and power delivery growing with every larger cluster, and the listed suppliers are taking that money. The window is late: everyone sees it, and the test is whether these layers out-grow the accelerators themselves.

D1D2D3R1R2R3C1C2C3foragainst D1D2D3R1R2R3C1C2C3foragainst
Fig. 1The balance. Drivers and catalysts against restraints, each block sized by its weight; catalysts hang dashed because they have not happened yet, sized by their odds. It tips toward the drivers.
  1. D1About 190GW of hyperscale capacity is announced across 777 projects as of early 2026, against McKinsey's estimate of $5.2T of datacentre capex through 2030.
  2. D2NVIDIA's Quantum-X InfiniBand co-packaged optics switches ship in early 2026 and Spectrum-X Ethernet follows in 2H 2026, all liquid-cooled.
  3. D3Racks past 100kW force liquid cooling past most new AI capacity around 2027, and the 800VDC change reworks power delivery inside the rack.
  4. R1NVIDIA's datacentre revenue grew 66-77% a year in recent quarters, a high bar for enabling layers whose commodity part grows at 12-14%.
  5. R2The $63B size rests on report-house figures with uniform double-digit growth and thin method behind them.
  6. R3Vertiv, Eaton and the other incumbents see the demand and are scaling to meet it, so little of it is open to newcomers at this level.
  7. C1NVIDIA's Spectrum-X Ethernet co-packaged optics switches ship in volume.31 Dec 2026
  8. C2Combined optical interconnect, liquid cooling and power-delivery revenue grows faster than merchant accelerator revenue across fiscal 2026-2027.31 Dec 2027
  9. C3Liquid cooling becomes the architecture for most new AI capacity.31 Dec 2027
Rests onthe beliefs underneath
Supported by · confidence
What would prove itdated tests, open and resolved
202720282029today12345predictionswatch 202720282029today12345predictionswatch
Fig. 2Each ring is a dated test: dashed while open, struck through when overdue, ticked or crossed once resolved.
  1. 1Across FY2026-2027 combined revenue of the scale-out enabling layers grows faster YoY than merchant GPU/accelerator revenue.Dec 2027 · open
  2. 2Dell'Oro and Yole segment data on enabling-layer revenue against accelerator revenue for fiscal 2026-2027.Dec 2027 · open
  3. 3Liquid cooling passing half of new AI capacity.Dec 2027 · open
  4. 4Through 2028 the datacentre scale-out enabling layers grow faster than accelerator spend.Dec 2028 · open
  5. 5Whether the enabling layers still out-grow accelerator spend through 2028.Dec 2028 · open
Expressionslisted, private, technologies
Technologies