Achieving 1500W liquid cooling with Iceotope

Key takeaways:

• AI workloads are driving CPUs and GPUs toward 1500W and beyond, making traditional air cooling and many first‑generation liquid solutions insufficient for future data center needs.
• In laboratory tests, Iceotope’s Precision Liquid Cooling technology cooled a 1500W thermal test vehicle, breaking the perceived 400W limit of single-phase cooling.
• Precision liquid cooling architecture uses environmentally safe dielectric fluid to deliver up to 40% lower energy use, up to 100% water savings, and as much as 6x rack‑level density vs. air and tank immersion.
• By proving the viability of 1500W single‑phase cooling, Iceotope positions its liquid‑cooled, rack‑based systems as a scalable, sustainable foundation for next‑generation AI infrastructure from data centers to the edge.

Single‑phase liquid cooling proves it can keep up

AI workloads are pushing CPU and GPU power budgets into territory air cooling simply can’t handle. Within the next few years, dense AI servers will routinely host 1000–1500W processors, with roadmaps already pointing higher. Iceotope’s latest white paper shows that single‑phase liquid cooling—long perceived as capped around 400W per chip—can not only reach 1500W, but do so with better performance than comparable tank immersion systems.

Breaking the 1500W barrier

The paper centers on a key milestone: achieving reliable chip‑level cooling at 1500W using Iceotope Precision Liquid Cooling and a copper heatsink.  To validate performance, the engineering team used Intel’s Airport Cove thermal test vehicle (TTV), which emulates the die area of 4th Gen Intel Xeon processors and allows apples‑to‑apples comparison of heatsinks and thermal interface materials.

The test setup circulated Shell S3X single‑phase dielectric coolant at 40°C through the heat sink at flow rates up to 8 l/min, while the TTV was evenly heated from 250W up to 1500W.  Thermocouples embedded in the TTV and heatsink enabled precise calculation of thermal resistance from the chip case (Tcase) to the coolant.

At 8 l/min, the copper pinned heat sink achieved a thermal resistance of 0.037 K/W at 1500W—an 11.4% improvement compared to a like‑for‑like tank immersion product using a forced‑flow heatsink.  Just as important, the thermal resistance stayed effectively constant at a given flow rate as power increased from 250W to 1500W, confirming that a well‑designed single‑phase system can scale with rising chip TDPs.

Beyond cooling: efficiency, density, and roadmap alignment

The whitepaper ties the 1500W result to broader data center priorities: energy efficiency, sustainability, and future‑proofing. Iceotope Precision Liquid Cooling technology can reduce energy usage by up to 40% and water consumption by up to 100% versus traditional approaches, thanks to direct‑to‑chip heat capture and dry operation.

The modular, rack‑based design supports up to 6x density uplift compared to both tank immersion and air‑cooled infrastructure, all within a familiar vertical form factor that simplifies deployment, maintenance, and scaling from a single rack to many—whether in core facilities or edge locations.  Using minimal volumes of people‑ and planet‑safe dielectric fluid, the system avoids many of the environmental and serviceability concerns associated with some two‑phase immersion chemistries.

Ultimately, operators must choose cooling technologies that align with processor and server roadmaps heading to 1500W and beyond.  By demonstrating stable, high‑performance 1500W cooling with single‑phase liquid and showing clear efficiency and density benefits, Iceotope positions its Precision Liquid Cooling as a practical, future‑ready foundation for next‑generation AI infrastructure.