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CDUs & Direct Liquid Cooling

ToneCooling publishes measured datasheets for GB300 and GB200 direct-to-chip cold plate kits: about 1,067 W per GPU plate at 1.7 L/min

. Source published 11 Nov 2026. Original reporting: ToneCooling (press release) (opens in a new tab).

What changed

Chinese cold plate maker ToneCooling published datasheets for two standard direct-to-chip kits on 11 November. In the company's own steady-state test with pure water, each GPU cold plate in its GB300 NVL72-class tray kit removed 1,066.94 W at 1.7 L/min with a 12.06 kPa pressure drop and a thermal resistance of 0.0130 to 0.0133 °C/W; each CPU plate removed 485.46 W at 0.7 L/min. The GB300 kit is designed for 800 to 1,200 W per GPU, pure water or PG25, a 20 to 30 °C inlet and up to 3 bar, and a full NVL72 rack uses 18 kits; the GB200 kit is rated 1,200 W + 1,200 W + 300 W and a rack uses 36. These are manufacturer test results, not independent measurements. The company quotes 4 to 6 weeks for samples and 6 to 8 weeks for production.

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Read the original: ToneCooling (press release): ToneCooling publishes measured datasheets for GB300 and GB200 direct-to-chip cold plate kits: about 1,067 W per GPU plate at 1.7 L/min (opens in a new tab)
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Related on CoolPower Index: Chip power and cooling.

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