Data Centers Are Becoming Supercomputers, Whole-Rack, Supernode and Liquid Cooling

From Buying Servers to Buying Racks, From 8 Cards to 384 and Beyond: The Supernode and Liquid Cooling Architecture Above 100 Kilowatts

The data center is becoming a single supercomputer, with the whole rack as skeleton, the supernode as neural network and liquid cooling as the circulatory system, and the supernode bonds dozens or hundreds of GPUs with scale-up interconnect at hundred-nanosecond latency, climbing from 8 cards to 384 and beyond. Above 100 kilowatts air cooling fails, cold plate passes coolant over the chips and immersion holds PUE as low as 1.04. Competition has shifted from single-server performance to whole-rack capability and from BMC quality to liquid cooling PUE. EXTRCOOL provides one-stop liquid cooling solutions.

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Area 51, NV, USA

EXTRCOOL INDUSTRY LIMITED

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CDU Commissioning, From Four Measurement Points to the Temperature Budget

P-in 25, S-out 30, Target 28: Why the 5-Degree Approach Exceeds a 3-Degree Budget and Where the Heat Balance Breaks

CDU commissioning starts from four measurement points: P-in for facility water entering as the primary cold inlet, P-out as the primary hot outlet, S-in for server return as the secondary hot inlet, and S-out leaving toward the servers, with the approach temperature defined as S-out minus P-in. With the primary inlet at 25 and supply at 30 against a target of 28, the app...

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Liquid cooling has moved into data centers on high reliability and low energy draw: thermal conductivity is 25 times air and the same volume moves nearly 3,000 times the heat, saving 30 to 50 percent of cooling energy. Immersion submerges heat sources in dielectric fluid, cold plate removes heat through high-conductivity channels, a lake-water project reaching PUE 1.28, ...

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