Supermicro has expanded its rear-door heat exchanger (RDHx) lineup as part of its Data Center Building Block Solutions (DCBBS) liquid cooling portfolio, targeting high-density AI and HPC racks in both new builds and retrofit data halls. The company says the expanded range is meant to provide a lower-disruption path to liquid cooling at the rack level, particularly where operators want to raise kW per rack without major facility changes.
The RDHx portfolio now spans 10 models with “chill door” cooling capacities ranging from 10 kW up to 120 kW at the door level. Supermicro also lists a maximum of 240 kW of cooling capacity at the rack level. For data center engineers, those figures put the product squarely in the category of rack-scale heat removal, where the practical question is less “can it cool” and more “how cleanly does it integrate with the rack, controls, and operations you already run.”
Supermicro says the RDHx units can be deployed as a primary liquid cooling approach or paired with its direct-to-chip (D2C) liquid cooling technologies as part of a broader DCBBS rack-scale infrastructure build. The company positions RDHx as a way to increase compute density and cooling efficiency for AI and HPC workloads “without requiring major facility modifications.”
On mechanical fit, Supermicro lists compatibility with standard EIA, ORv3, and MGX racks, aiming for installation in both new deployments and existing facilities. That rack compatibility matters because rear-door approaches often live or die on whether they can be added without reworking aisle geometry, rack layouts, and service clearances.
For operations and controls, Supermicro lists monitoring of temperature, pressure, flow rate, and pump status, with interfaces including Redfish, SNMP, and web-based management, plus integration with Supermicro SuperCloud Composer (SCC). The company also calls out intelligent fan control, n+1 redundancy, and anti-condensation protection.
Supermicro says the RDHx line includes both DC-powered and AC-powered models, with DC options designed to integrate with rack busbars. As part of DCBBS, the company also ties RDHx to rack-scale integration, facility power and cooling, intelligent management software, and deployment services, with the goal of reducing integration risk and time-to-online.
Charles Liang, president and CEO of Supermicro, said, “Our expanded RDHx portfolio helps customers realize the benefits of liquid cooling, with a range from 10kW up to 120kW of cooling at the door level, with a max of 240kW of cooling capacity at the rack-level.”
Source: Supermicro
