Liquid cooling has till now been pretty much confined to CPUs and GPUs, but Intel’s Gaudi3 AI accelerator can be liquid- or air-cooled cooled to a partnership with cooling specialist Vertiv.
Gaudi3, due to arrive in 2024, will support Vertiv’s pumped two-phase (P2P) cooling infrastructure. The liquid cooled version has been tested up to 160kW accelerator power using facility water from 17?C up to 45?C (62.6?F to 113?F). For air-cooled data centers the Vertiv air cooled solution supports up to 40kW of heat load at up to 35?C (95?F).
The numbers reflect the efficiency of liquid cooling and liquid cooling can handle four times the power can handle much higher temperatures.
Vertiv’s P2P liquid cooling is architecturally similar to currently available single-phase liquid cooling, but more efficient and with better performance, the vendor says. It uses cold plates in a closed loop direct liquid cooling (DLC) technology, similar to direct-to-chip cooling, with a low power pump to move non-toxic refrigerant through cold plates attached directly to the chip.
Heat from these components is transferred to the fluid via heat of vaporization, whereby the fluid changes phases from liquid to gas. The gas is then captured and cooled, turning it back into liquid. This supports customers in reducing or possibly eliminating chillers altogether in their data centers.
Its yet another sign of the growing acceptance of liquid cooling, being driven by the need to cool these exceptionally hot chips used in AI processing.
