Just sat in a presentation at Intel Developer Forum. There are interesting facts that are hard to get out of Server OEMs.
Updated 3:21P. Here is the pdf of the presentation
Server Cooling Design Optimization for Low Power Consumption
• Design implications of board layout due to cooling requirements
• Guidelines for evaluating power savings and cooling BOM cost
• Methods for enabling high room ambient capability
• Example next-generation system thermal design comparisons
Platform Thermal Architect
Robin is a thermal architect in Intel’s Server Platforms Group covering future platforms. He has designed cooling systems for servers and workstations for more than 20 years at both IBM* and Intel.
The slides will be up on the www.intel.com/idf site, but here are some pictures that will give you an idea of what was presented.
A choice of what heat sink has a 40% difference in fan power.
Combine the heat sink choice with fan power and look at a range of 75 watts on the high to a low of 25 watts to cool a 95 watt processor.
And this choice can affect the ambient temperatures by 10[ degrees C.
And Robert adds a good call to action.
Fan Power Consumption should be part of equipment specifications.