GPU racks that consumed 10 kW two generations ago now regularly exceed 60 to 80 kW per cabinet. The facilities built to support traditional compute, room-level air cooling, raised-floor plenums, and broadly distributed CRAC units were not designed for this.
This white paper examines the options available to operators today: hot/cold aisle containment, rear-door heat exchangers, and direct liquid-to-chip (DLC) cooling. It explores why rack-level containment is the most complete, fastest-to-deploy, and most future-flexible solution for operators who cannot wait for a multi-year infrastructure overhaul.
It also addresses a gap that is consistently underestimated in DLC-only deployments: the 7 to 40% of rack heat that direct liquid cooling does not capture, the water damage risk it introduces into the cabinet environment, and the operational complexity it creates without a containing enclosure.
The retrofit approach described in this paper is deployable today, in existing data halls, without full facility overhaul, for operators who need GPU density now, and the flexibility to scale further tomorrow.
Inside this paper:
- Why traditional room-level cooling fails above 20 to 25 kW per rack
- An honest comparison of four retrofit approaches and where each breaks down
- The water-in-the-whitespace risk that DLC-only deployments consistently underestimate
- A facility readiness assessment checklist across power, cooling plant, structural, and DLC-specific domains
- A five-phase retrofit playbook deployable without disrupting live adjacent infrastructure
- Design recommendations for colocation operators, neocloud tenants, and enterprise IT teams
Get the full breakdown.
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