L1800C45 is the line’s density ceiling: 1,800 kW and up to 220 kW/rack in the same 45 ft High Cube as L1240, dual loop, UPS left outside. Buy it when the pad already has distribution. Expansion blocks: 90 days ex-works.
The line tops out here. L1800C45 is the only liquid SKU rated R220 — 220 kW/rack — for GB300 NVL72 / B300 HGX in a 45 ft shell. Omitting UPS is not a missing part: the site already paid for power, so the box does not bill you twice. Dual loops (GPU 36–45 °C, in-row CW 10/15 °C) stay in the same factory-tested enclosure.
L1800C45DR220Roadmap A separate MDCX power module (UPS / battery / PDC) is in development for sites where the boundary must sit outside the compute enclosure.
Cold plate is the entry ticket for SXM-class density. Why Liquid Cooling →
L1240 is the empty-pad buy — UPS in the box, 150 kW/rack. L450 is the 20 ft first placement at a higher cost per kW. L1800C45 is neither: same 45 ft footprint as L1240, 560 kW more IT, 70 kW more per rack, and the power plant stays in the yard.
Explore the 45 ft high-density Liquid Cooling container — gullwing doors and rack access.
The OpenUSD reference model is published in the annex of the L1800C45 Reference Design. Heavy USD is explicit download only. Specs: USD output.
Single-line power, cooling loops, ratings, and downloads for engineers.
L1800C45 (L1800C45DR220) is 1,800 kW in the same 45 ft shell, dual loop, up to 220 kW/rack, with UPS outside. L1240C45 is 1,240 kW, single 26 °C loop, UPS inside.
Up to 220 kW per rack (R220) — the density ceiling of the Liquid Cooling line.
First delivery is 90 days ex-works from receipt of down payment. Expansion blocks: 90 days ex-works.
Specifications updated August 2026 · design targets, site conditions apply.