Learning path

Cooling: liquid to the chip, heat to the air

Above roughly 20 to 30 kW per rack, air stops being practical. NVL72-class racks are cooled by liquid at the chip, with a small air remainder. NVIDIA specifies 45 deg C inlet water for GB200, GB300 and Vera Rubin. Thirteen topics are described further down.

Source: https://neocloud.fyi/sources/ Checked 2026-09-18

site's own compiled learning path, synthesised from the sources cited in each step

10 h · free

  1. core ASHRAE: Emergence and Expansion of Liquid Cooling The standard-setter's primer and the source of the W17 to W45 water classes. Start here for vocabulary. free0.75 h
  2. core Schneider White Paper 133 Six liquid-cooling architectures for AI halls: CDU type against heat-rejection method. free1 h Opened 2026-10-06: Schneider's download page for White Paper 133 (version 2) offers the PDF with no price or purchase step: https://www.se.com/uk/en/download/document/SPD_WP133_EN/
  3. core Vertiv: Deploying Liquid Cooling in the Data Center Practical guide to CDUs, manifolds and rear-door heat exchangers. free1 h
  4. core OCP Academy: Introduction to Liquid Cooling Free introductory course. free0.7 hunverified Existence and content found via search; not independently confirmed by fetching OCP's own page directly.
  5. core OCP Academy: Liquid Cooling Technologies Overview Four short parts: fluid selection, chemistry, commissioning, monitoring and maintenance. free1 hunverified The course listing page did not fully render on fetch; content not independently confirmed.
  6. core OCP Academy: Project Deschutes CDU Forty minutes on Google's open 2 MW CDU specification. A real specification with numbers is the best anchor for vendor conversations. free0.7 h
  7. core Coolant chemistry: OCP PG25 guideline and Dell's TCS/FWS guidance Skim both for water-quality talking points.
    Also: Dell coolant guidance · OAI liquid cooling guidelines     free0.5 h
  8. core NVIDIA's 45 deg C warm-water specification What NVIDIA states for the MGX platform. free0.5 h
  9. optional Schneider University: DLC challenges and economizer modes Two free one-hour modules. free2 hunverified Existence and content found via search; not independently confirmed by fetching Schneider's own page directly.
  10. optional Uptime webinar: direct liquid cooling, pressure is rising Recorded, under an hour. free1 h Opened 2026-10-06: Uptime's own page lists the webinar on demand; viewing needs a free BrightTALK account. Running time was not checked.
  11. optional Vertiv and Stulz continuing-education webinars One-hour sessions with a certificate: CDUs, manifolds, rear-door heat exchangers, liquid-cooling capex and opex. free1 each hunverified Existence and content found via search; not independently confirmed by fetching the vendor's own page directly.
  12. later ASHRAE Datacom Book 4, Liquid Cooling Guidelines The paid deep reference. The free white paper covers most of what a non-designer needs. paid

What was not found

Germany's Energy Efficiency Act is the European reference for heat-reuse obligations; no equivalent applies across the EU as a whole.

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