Two AI Accelerator Makers Simultaneously Update Rack-Level Thermal Design Whitepaper
Leading vendors tighten chip thermal specifications; liquid cooling standardization accelerates; OCP to discuss conformal connector interoperability draft next week.
Taipei COMPUTEX — Two leading AI accelerator manufacturers simultaneously released a supplementary chapter to the "2027 Rack-Level Thermal Design" whitepaper today, tightening recommended ranges for cold plate inlet temperature and chip junction temperature to 45°C±2°C and a 100°C ceiling respectively, while providing the first quantitative thermal throttling curve model.
Technical Details
Tightened Temperature Specifications:
- Cold plate inlet temperature: reduced from 50°C to 45°C±2°C
- Chip junction temperature ceiling: maintained at 100°C, with new transient peak tolerance window
- Temperature gradient: cold plate and secondary liquid cooling circuit differential must not exceed 5°C
New Additions:
- Thermal throttling trigger curve with 5-level temperature-frequency mapping table
- Impact assessment model for liquid cooling pipeline pressure fluctuations on thermal efficiency
- Recommended sensor deployment density (3 temperature probes per kilowatt)
Industry Context
With single-chip power consumption exceeding 1kW, traditional air cooling solutions are reaching their limits. Liquid cooling technology penetration in data centers has risen from 23% in 2025 to 61% in 2027, but industry standards remain fragmented.
The simultaneous whitepaper update by two major vendors is seen as a signal toward standardization.
OCP Community Updates
The Open Compute Project (OCP) announced it will discuss the interoperability draft for conformal quick-disconnect connectors at next week's meeting. This connector technology enables liquid cooling pipeline maintenance without thawing, considered key to improving data center operational efficiency.
If the draft passes, it would establish the first unified interface standard for liquid cooling equipment from different manufacturers.
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