Accelsius

Company brief

What Accelsius does

Accelsius builds NeuCool, a two-phase direct-to-chip platform in which a commercially available, non-conductive refrigerant boils at the processor cold plate and condenses elsewhere in a sealed loop. It supplies the cold plates and circulation hardware as rack and multi-rack systems. The linked IR80 is an in-rack design installed at Equinix's Ashburn Co-Innovation Facility, giving customers a place to examine an operating system.

The linked MR250 is a 250-kilowatt in-row unit that Accelsius supplied for testing under a United States Department of Energy research program. A planned Ontario campus selected NeuCool, but the public record does not establish that the full 300 megawatts is built or operating. Founded in 2022 and backed by Innventure, Accelsius has less public operating history than long-established water-loop suppliers.

Its distinction is the dielectric, phase-change loop and the ability to accept warmer facility water, not ownership of the entire plant. Buyers should verify exact processor and server support, refrigerant supply and regulatory treatment, pressure and containment strategy, redundant pumps and controls, local technician training, condenser and heat-rejection requirements, and warranty ownership after server modification. They should also request sustained-load data at their design conditions.

Product capacities, efficiency comparisons, and project status in this profile are company-reported by Accelsius or its partners; independent fleet-wide reliability and cost data are not publicly established.

Use the connected product and deployment records to distinguish a stated capability from evidence that the company has delivered it.