A cold plate is a metal heat exchanger typically made of copper or aluminum that is mounted directly onto a heat-generating component such as a CPU or GPU. Liquid coolant circulates through internal channels within the plate, absorbing heat from the component and carrying it away to a coolant distribution unit (CDU) or heat exchanger, where it is rejected before the coolant is recirculated. Cold plates are the core hardware component that makes direct-to-chip cooling possible.
Because the cold plate makes direct contact with the processor, it removes heat at the source rather than relying on air to carry heat away from equipment, making it significantly more efficient than traditional air cooling for high-density workloads. Cold plates do not cool the entire server, however; residual heat from other components such as memory and drives still typically requires supplemental air cooling.
Cold plates are a foundational element of several advanced data center liquid cooling approaches, including microchannel cooling, which uses cold plates engineered with densely packed internal microchannels to maximize heat transfer surface area for the most thermally demanding workloads.
Key Benefits of Cold Plates for High-Density Data Centers
- Higher heat removal capacity per unit than air cooling, enabling support for modern high-TDP (thermal design power) processors
- Improved data center energy efficiency by reducing dependence on mechanical air cooling and lowering PUE
- Compatible with standard rack form factors, making adoption in existing facilities more practical than full immersion cooling
- Supports higher rack densities without the thermal constraints that limit air-cooled deployments
Cold Plates and DCIM
As cold plate deployments increase rack power densities, accurately modeling cooling infrastructure and tracking power consumption, thermal conditions, and capacity becomes more critical.
Modern DCIM software simplifies deployment planning and helps maintain uptime for your high-density and AI infrastructure by providing a digital twin of your liquid cooling environment. You can track, model, and visualize your liquid cooling infrastructure, including CDUs, heat exchangers, piping, valves, and manifold ports. Furthermore, you can map port-to-port connections for direct-to-chip GPU infrastructure and leverage these relationships for impact analysis.
You can also monitor power utilization and environmental conditions in real time and set thresholds to prevent issues before they result in outages.
Want to see how Sunbird's world-leading DCIM software makes it easy to manage high-density, liquid-cooled environments? Get your free test drive now!