Standard kits ship from one piece, with STEP models and test records available to server builders on request
HUIZHOU, China — November 11, 2026 — ToneCooling Technology Co., Ltd., a manufacturer of liquid cold plates and data center liquid cooling hardware, today published measured datasheets for two standard direct-to-chip cold plate kits: the GB300 4G+2C kit (TC-BZP-GB300-01A) and the GB200 kit (TC-BZP-GB200-01A). Both kits are supplied as standard products to their published datasheets, from a single evaluation sample to production volumes.
The GB300 kit cools one GB300 NVL72-class compute tray. It includes four GPU cold plates, two CPU cold plates, a manifold, two color-coded quick disconnects and ten hoses. In ToneCooling’s steady-state test with pure water, each GPU cold plate removed 1,066.94 W at 1.7 L/min with a 12.06 kPa pressure drop and 0.0130–0.0133 °C/W thermal resistance. Each CPU cold plate removed 485.46 W at 0.7 L/min with a 10.39 kPa pressure drop and 0.0220 °C/W. The kit is designed for 800–1,200 W per GPU, pure water or PG25, a 20–30 °C inlet and up to 3 bar working pressure. A full NVL72 rack uses 18 kits. A production GB300 kit shipped in October 2026 measured 33.03 kPa flow resistance at 8.2 L/min and a helium leak rate of 1.2 × 10−11 Pa·m³/s at 0.6 MPa, against a 1 × 10−7 Pa·m³/s requirement.
The GB200 kit cools one GB200 superchip with two GPU cold plates and one Grace CPU cold plate on one manifold, rated 1,200 W + 1,200 W + 300 W. A full GB200 NVL72 rack uses 36 kits. In a July 2026 production batch, the kits passed a helium leak test at 0.6 MPa with a measured leak rate of 1.2 × 10−11 Pa·m³/s, against a 5 × 10−6 Pa·m³/s requirement, and a 12-hour nitrogen pressure hold at 0.4 MPa.
“Server builders tell us the hardest part of an AI rack project is getting verified numbers early,” said Shourong Tang, Founder of ToneCooling. “We publish measured flow, pressure drop and thermal resistance, and every kit is leak tested before it ships, so engineering teams can size the loop before they place an order.”
Both datasheets download without a form (GB300 datasheet, GB200 datasheet). STEP models, pressure-drop data, leak-test records and thermal test reports are available on request. Evaluation samples are typically available in 4–6 weeks; production lead time is normally 6–8 weeks and is confirmed at quotation.
- GB300 cold plate kit: tonecooling.com/nvidia-gb300-nvl72-liquid-cold-plate/
- GB200 cold plate kit: tonecooling.com/product/gb200-liquid-cooling-plate/
- STEP model request: tonecooling.com/gb200-gb300-step-model-request/
About ToneCooling
ToneCooling Technology Co., Ltd. designs and manufactures liquid cold plates, manifolds and coolant distribution units for AI servers, EV batteries and power electronics. Founded in Huizhou in 2004, the company manufactures in Huizhou, Guangdong, in an ISO 9001 facility, and exports to more than 30 countries. Regional support is provided through ToneCooling Texas LLC (United States), ToneCooling Europe OÜ (Estonia) and ToneCooling Australia Pty Ltd.
NVIDIA, GB300 and GB200 are trademarks of NVIDIA Corporation. The kits are platform-compatible products; no affiliation with or endorsement by NVIDIA is implied.
Media contact: sales@tonecooling.com · tonecooling.com
