Accelsius

Austin maker of NeuCool two-phase direct-to-chip cooling, rated up to 4,500 W per socket. The row-based MR250 CDU delivers 250 kW, and the IR150 puts a 150 kW two-phase CDU inside an 800 mm rack.

CDU, Cold plate, Two-phase cold plate HQ Austin, Texas, USA Owned by Innventure Checked 9 Nov 2026

Smallest CDU: 150 kW Converge Digest: Accelsius IR150, 9 Nov 2026
Largest CDU: 250 kW Accelsius introduces NeuCool MR250 (Oct 2025), 9 Nov 2026
Max per rack: 250 kW Accelsius introduces NeuCool MR250 (Oct 2025), 9 Nov 2026

Rating conditions

MR250: 250 kW (1 x 250 kW or 2 x 125 kW per rack), facility water up to 45°C, R1233zd(E) or R-515B. 4,500 W+ per socket.

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Datasheet

Source on every value

Technologies Liquid cooling product types the vendor sells today. 'Liquid-to-air CDU' is a sidecar unit or heat dissipation unit that needs no facility water. 'Two-phase cold plate' boils a refrigerant or dielectric on the chip.: CDU, Cold plate, Two-phase cold plate 1
Smallest CDU kW Rated cooling capacity of the smallest shipping CDU in the line, as the vendor publishes it. Rating conditions (approach temperature, fluid) are in the spec notes. Blank when not published.: 150 3
Largest CDU kW Rated cooling capacity of the largest shipping CDU, as the vendor publishes it. Prototypes and announced-only units are left out and named in the spec notes. Blank when not published.: 250 2
GPU platforms (vendor-stated) GPU or rack platforms the vendor itself names as supported, certified or targeted, such as NVIDIA GB200 NVL72 or Vera Rubin. Vendor statements only, each with a source. Blank when the vendor names none.: NVIDIA H100; NVIDIA H200; NVIDIA B200; NVIDIA Grace CPU; AMD MI325X; AMD MI355X 1
Level Where the products sit: in the server, in the rack, in the row, or at facility scale (skid or facility distribution unit).: Server, In-rack, In-row 1
Coolant Coolant on the IT side: water-glycol (PG25 and similar), single-phase dielectric (oils, GTL, synthetic hydrocarbons) or two-phase dielectric or refrigerant.: Dielectric, 2-phase 1
Max per rack kW Highest rack density the vendor publishes for its own system (immersion tank, in-rack CDU, rear door or OEM rack). Filled only when the vendor states a per-rack figure.: 250 2
Rear door max kW Highest published heat removal of the vendor's rear-door heat exchanger, per rack.: Not published
Vendor type Liquid cooling specialist, thermal and HVAC major, power and data center infrastructure major, server OEM, component maker (cold plates, connectors, CDUs sold to OEMs) or fluid supplier.: Specialist 1
Parent company Owner or controlling shareholder when the vendor sits inside a larger group, such as CoolIT under Ecolab or Motivair under Schneider Electric.: Innventure 1
HQ region Region of the vendor's (or brand owner's) headquarters.: North America 1
HQ country Country of the vendor's (or brand owner's) headquarters.: United States 1
Headquarters Headquarters city and country as the vendor states it.: Austin, Texas, USA 1
Manufacturing Regions or sites where the vendor says it builds liquid cooling products. Blank when not published.: North America (Austin, TX) 1
Key products Main product lines and model names for data center liquid cooling.: NeuCool MR250 (row CDU), NeuCool IR150 (rack-integrated), NeuCool iCDU, cold plates 1
Spec notes Rating conditions behind the numbers (approach temperature, water temperature, fluid), conflicting figures, and prototypes left out of the ranges.: MR250: 250 kW (1 x 250 kW or 2 x 125 kW per rack), facility water up to 45°C, R1233zd(E) or R-515B. 4,500 W+ per socket. 1

Sources

Accelsius NeuCool solutions accessed 2026-11-09
Accelsius introduces NeuCool MR250 (Oct 2025) accessed 2026-11-09
Converge Digest: Accelsius IR150 accessed 2026-11-09

Accelsius alternatives

Largest CDU

Johnson Controls (Silent-Aire) 1,050 kW1
LiquidStack 1,350 kW1
Chilldyne 1,500 kW1
Delta Electronics 1,500 kW1
Rittal 1,500 kW2
HPE (Hewlett Packard Enterprise) 1,600 kW3

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