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Microsoft claims a 'breakthrough' in AI chip cooling
Microsoft claims a 'breakthrough' in AI chip cooling

AI is an enormous energy drain, contributing to greenhouse gas emissions at a time when the planet desperately needs progress in the opposite direction. Although most of that comes from running GPUs, cooling them is another significant overhead. So, it's worth noting when a company of Microsoft's stature claims to have achieved a breakthrough in chip cooling.
Microsoft's new system is based on microfluidics, a method long pursued but hard to implement. The company claims its approach could lead to three times better cooling than current methods.
Many data centers rely on cold plates to prevent GPUs from overheating. Although effective to a degree, the plates are separated from the heat source by several layers of material, which limits their performance. "If you're still relying heavily on traditional cold plate technology [in five years], you're stuck," Microsoft program manager Sashi Majety is quoted as saying in the company's announcement.
In microfluidics, the coolant flows closer to the source. The liquid in Microsoft's prototype moves through thread-like channels etched onto the back of the chip. The company also used AI to more efficiently direct the coolant through those channels.
Microsoft
Another aspect separating this prototype from previous attempts is that it drew inspiration from Mother Nature. As you can see in the image above, the etchings resemble the veins in a leaf or a butterfly wing.
Microsoft says the technique can reduce the maximum silicon temperature rise inside a GPU by 65 percent. (However, that number depends on the workload and chip type.) This would enable overclocking "without worrying about melting the chip down," Microsoft's Jim Kleewein said. It could allow the company to place servers closer together physically, reducing latency. It would also lead to "higher-quality" waste heat use.
Although this sounds good for the environment in a general sense, Microsoft's announcement doesn't lean into that. The blog post primarily discusses the technique's potential for performance and efficiency gains. Green benefits are only alluded to briefly as "sustainability" and reduced grid stress. Let's hope that's only a case of a cynical observer overanalyzing framing. Our planet needs all the help it can get.

This article originally appeared on Engadget at https://www.engadget.com/ai/microsoft-claims-a-breakthrough-in-ai-chip-cooling-193106705.html?src=rss

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