CoolIT, a company specializing in liquid cooling solutions for data centers, has debuted a new liquid cooling cold plate, advertised to dissipate 4kW of heat, which is four times what Nvidia’s B200 accelerator is rated at. The company claims a doubling of heat dissipation over current industry standards regarding single-phase Direct Liquid Cooling (DLC) solutions. This announcement falls right before GTC, where Nvidia is expected to introduce its GB300 Blackwell Ultra offerings and discuss plans for the next-generation Rubin architecture. The timing may be more than a coincidence.
As the name suggests, Direct Liquid Cooling brings the liquid coolant in direct contact with the heat-generating components, such as a CPU or GPU. The single-phase part refers to the state of the coolant; in single-phase, the coolant remains a liquid while in two-phase it changes state by boiling / condensing. In general, this is quite similar to the AIOs (All-In-Ones) and custom liquid cooling loops your PC might have. Both rely on the same principles and fall under the umbrella of the direct-to-chip (D2C) cooling approach.
