Large-scale compute, told as a supply chain.

Rankings tell you how fast a machine is. They do not tell you who built it, whose fabric it runs on, which of those vendors still exists under its own name, or which listed company carries the exposure. Compute Atlas is the layer underneath: a parts graph with 52 systems, 31 sites and 90 companies as first-class nodes, every fact carrying its own source.

Browse systems The analyses How supercomputers work How this is sourced

Systems: 52
Component edges: 279
Parts: 138
Companies: 90
Countries: 12
Aggregate Rmax: 7.27 EFlop/s

What this answers that a ranking cannot

All analyses

Accelerator share, weighted by FLOPS

Machine-count share understates whoever supplies the largest systems. Weighting by capability reorders it.

Interconnect share over time

Two acquisitions in twelve months ended the independent fabric business. Invisible without entity resolution.

Domestic substitution index

The European line sits at zero in every year. Not one European system is fully domestically supplied.

The shadow list

Two clusters on no ranking anywhere come to roughly a quarter of every ranked system here combined.

Announcement to first light

Median 34 months. The worst case took nine years, and it was a vendor-execution story, not a facility one.

Silicon generation decay

Vendors ship a generation every 18 months. The installed base turns over on a seven-to-ten-year cycle.

Installed power by cooling architecture

Air stops being physically capable around 20 kW a rack. Current cabinets are rated to twenty times that.

Every analysis carries a chart, a written read, a note stating exactly how it was calculated, a table of the same numbers, and a CSV of our derived output. The eighth, the shadow list, has not shipped: it needs an estimator we are not willing to publish until the method can be published with it.

Three things the spec strings hide

Who a 2002 supplier is today. ASCI Q ran on Alpha processors designed by Digital Equipment Corporation. Compaq bought DEC in 1998, HP bought Compaq in 2002, and the enterprise business became HPE in 2015. Three hops from the silicon to the ticker. Quadrics, which supplied its fabric, wound down in 2009 with no acquirer at all, so that row simply terminates. See it.

Where the substitution line actually moved. Tianhe-1A was American compute on a Chinese fabric in 2010. Sunway TaihuLight was fully domestic silicon in 2016. Tianhe-2 was rebuilt with domestic accelerators after an export control blocked the upgrade it had planned, and it got faster. See the index.

What is missing entirely. The largest AI clusters built in the last three years mostly never submitted results, so they appear on no public ranking. We carry ranked and unranked systems in one taxonomy with explicit confidence tiers, rather than pretending the ranked world is the whole world. See a system with no rank.