OnRackCDU™ -- For Liquid Cooled Data Centers

The Asetek OnRackCDU™ is a warm water CDU (Cooling Distribution Unit) system capable of reducing data center cooling cost by over 50% and allowing 2.5x-5x increases in data center server density. OnRackCDU is deployed at a rack level, providing maximum scalability.

Designed to work with Asetek Direct to Chip (D2C) cooling loops that capture between 60-80% of server heat, the heat is rejected by the OnRackCDU to facilities water in a highly efficient all liquid path. RackCDU removes heat from CPUs, GPUs, memory modules and other high heat components within servers using water as hot as 40°C (105°F), eliminating the need for expensive and inefficient chillers.

Features and Benefits

  • Zero-U rack level CDU mounted in a 10.5 inch rack extension to the back of the rack
  • D2C server coolers are drop in replacements for standard server air heat sinks
  • Captures between 60% and 80% of server heat with Asetek D2C cooling loops
  • 2.5x-5x increases in rack density
  • Liquid -to- liquid heat exchangers transfer heat between facilities liquid and server liquid, the two liquids never mix
  • Tubes attached with dripless quick connects to move server cooling liquid between RackCDU and servers
  • Monitoring system reports out system warnings and alarms


OnRack CDU