Liquid Cooling Vendors

Direct-to-chip cooling vendors

Direct-to-chip cooling bolts a cold plate onto each GPU and CPU and pumps coolant through it, carrying most of the server’s heat out as liquid. Server makers build their densest racks around it: Dell rates its IR7000 rack at 504 kW with direct liquid cooling, and Supermicro’s DLC-2 rack runs an in-rack CDU of 250 kW. Cold plates come from specialists such as CoolIT, JetCool and Chilldyne, from two-phase makers ZutaCore and Accelsius, and from Taiwanese suppliers Cooler Master and AVC.

16 vendorsChecked

TechnologiesGPU platforms (vendor-stated)Coolant
SupermicroCDU · D2C · Sidecar · Manifold · OEM5,00012502NVIDIA GB200 NVL72; NVIDIA HGX B300; AMD Instinct MI300X/MI325X; AMD Instinct MI300AWG—North America2026-11-09
CoolIT SystemsCDU · D2C · Sidecar · Manifold3,0001—NVIDIA Vera Rubin (CHx3000); AMD Helios (CHx3000); NVIDIA GB200 NVL72 (CHx2000: up to twelve 120 kW racks)WGEcolabNorth America2026-11-09
Cooler MasterCDU · D2C · Sidecar · Manifold2,5001——WG—Asia-Pacific2026-11-09
Motivair by Schneider ElectricCDU · D2C · RDHx · Sidecar2,5001—NVIDIA (CDUs stated as certified for NVIDIA's latest hardware); NVIDIA NVL144 (HDU sized 1:1)WGSchneider ElectricNorth America2026-11-09
Boyd Thermal (Eaton)CDU · D2C · Sidecar · Manifold2,3003——WGEatonEurope2026-11-09
ZutaCoreCDU · D2C · D2C-2φ2,00011201NVIDIA GB200 Grace Blackwell (ZutaCore release); AMD, Intel and NVIDIA CPUs/GPUs (general support)DE-2φ—North America2026-11-09
JetCool (Flex)CDU · D2C · Manifold · QD1,80013001—WGFlexNorth America2026-11-09
HPE (Hewlett Packard Enterprise)CDU · D2C · OEM1,6003——WG—North America2026-11-09
ChilldyneCDU · D2C · Manifold1,5001——WG—North America2026-11-09
AccelsiusCDU · D2C · D2C-2φ25022502NVIDIA H100; NVIDIA H200; NVIDIA B200; NVIDIA Grace CPU; AMD MI325X; AMD MI355XDE-2φInnventureNorth America2026-11-09
AVC (Asia Vital Components)CDU · D2C · Manifold———WG—Asia-Pacific2026-11-09
Dell Technologies (PowerCool)CDU · D2C · RDHx · OEM—5041NVIDIA GB300 NVL72 (PowerEdge XE9712); NVIDIA B200 (PowerEdge XE9680L)WG—North America2026-11-09
EnvicoolCDU · D2C · IMM-1φ · Manifold · QD———WG · DE-1φ—Asia-Pacific2026-11-09
GIGABYTE (Giga Computing)D2C · OEM——NVIDIA Vera Rubin NVL72—GIGABYTE TechnologyAsia-Pacific2026-11-09
Lenovo NeptuneD2C · OEM—1353NVIDIA GB300 NVL72 (Lenovo rack-scale system)WGLenovoAsia-Pacific2026-11-09
WiwynnD2C · OEM—————Asia-Pacific2026-11-09
Technologies
CDUCoolant distribution unit
D2CDirect-to-chip cold plate
D2C-2φTwo-phase direct-to-chip cold plate
IMM-1φSingle-phase immersion tank
IMM-2φTwo-phase immersion tank
RDHxRear-door heat exchanger
SidecarLiquid-to-air CDU
ManifoldRack and row manifolds
QDQuick-disconnect couplings
OEMServer maker with liquid-cooled racks
FluidCoolant fluid supplier
Coolant
WGWater-glycol
DE-1φSingle-phase dielectric
DE-2φTwo-phase dielectric or refrigerant

Single-phase, two-phase and what feeds the plates

How ratings are read

Single-phase water-glycol

Most cold plates run water with propylene glycol (PG25 and similar), fed by a CDU. Designs differ at the plate: JetCool’s SmartPlate fires microjets of coolant straight at the chip’s hot spots, and Chilldyne runs its loop under negative pressure, so a leak pulls coolant away from the electronics instead of spraying it.

Two-phase cold plates

Two-phase plates boil a dielectric fluid or refrigerant on the chip and carry the heat away as vapour. A leak can’t short the server. Accelsius rates its NeuCool plates at 4,500 W+ per socket and its MR250 CDU at 250 kW on facility water up to 45 °C. ZutaCore’s HyperCool runs waterless, from a 20 kW air-based CDU up to 120 kW per rack.

Buy the loop, not just the plate

A direct-to-chip system is plates, rack manifolds, quick-disconnect couplings and a CDU. Check that the couplings follow the OCP UQD spec (Parker, Stäubli, CEJN and Danfoss sell UQD couplings, CPC sells blind-mate connectors) and that the CDU is rated at your facility water temperature. Supermicro, Dell, HPE and Lenovo sell the whole loop with the servers.