Delta’s GoCool-150 Goes Big To Enable 150kW Liquid-To-Air Cooling for ASRock Rack’s NVIDIA VR NVL72

NVIDIA Corp. — a great deal has been made about the power and cooling needs of AI servers, and for good reason. The high TDPs of individual chips, combined with the densities vendors are pursuing, are resulting in racks that draw 200kW today and plans for 600kW+ racks in the future.

As a result, data center operators have to contend not only with powering these systems but also with keeping them cool. Of the two, power is arguably the easier problem to solve, thanks to designs such as 800VDC busbars. That still leaves the burning topic of how to cool these systems. At ASRock Rack’s Computex 2026 booth, the company showcased a complete NVIDIA Rubin Vera NVL72 setup. This included not only the NVL72 hardware rack itself, but also, in conjunction with partner Delta, a potential cooling option for the power-hungry rack. An even more massive liquid-to-air coolant distribution unit. Designed to discharge up to 150kW of heat, Delta’s GoCool-150 is positioned as a solution for data centers that want to house direct-liquid-cooled server racks but do not have a larger liquid-cooling loop integrated into the facility. Historically, discharging 150kW of heat from a single computing rack would be kind of an absurd proposition to begin with. If you look at what folks consider “high-end,” like the new IBM Z17 mainframes, even those run at much lower power density. And yet, here we are. To that end, Delta has built an equally crazy heat exchanger to accomplish the task. The GoCool-150 is essentially a massive radiator designed to cool a single liquid-cooled server rack. The company is aiming the CDU at data centers that want to accommodate liquid-cooled servers in facilities originally designed for classic air cooling, relying on air handlers and hot-air containment. As a result, those data centers cannot be easily retrofitted with building-scale liquid-cooling loops. Absent the ability to use those larger heat exchanger setups, Delta has developed a rack-sized(ish) heat exchanger to be placed in air-cooled data centers. Build a big enough heat exchanger and run enough air through it, and you can indeed discharge upwards of 150kW of heat into such an environment. The resulting system is an impressive sight of heatsinks, pumps, and fans.