What is the CoolIT CHx2000?
The CHx2000 is a row-based coolant distribution unit (CDU) for moving heat from direct-to-chip server loops into facility water. CoolIT rates it at 2 MW and says its 1.2 liter-per-minute-per-kilowatt flow can support as many as twelve 120 kW NVIDIA GB200 NVL72 racks. Those figures describe a design point, not a guaranteed rack count. CoolIT's comparison table uses a 4°C approach-temperature difference and 25% propylene glycol; warmer facility water, a smaller temperature difference, added glycol, or more pressure loss in site piping can reduce usable capacity. The same release reports 53 psi of secondary head pressure, stainless-steel piping, 25-micron filtration, and hot-swappable pumps, filters, and sensors. It also describes built-in redundancy, group control for up to 20 units, and Redfish, Simple Network Management Protocol, Modbus, and other remote interfaces. A buyer should still request the full pump curve, electrical load, primary and secondary connection data, water-quality limits, sound level, and capacity at the site's actual supply and return temperatures. Confirm server-vendor approval, manifold and quick-disconnect compatibility, control integration, service clearances, and which components remain redundant at full load. The release states six-nines availability, but it does not publish the calculation, maintenance assumptions, or field data behind that claim.