Impact of retrofitted CPU water cooling on supercomputer performance and power consumption

Water cooling of servers is emerging to high-performance computing (HPC) platforms, not only due to the requirements on effective cooling of high-density server blades, but also for effective recycling of waste heat. In this poster paper, we compare the measurement results of two production-grade HP...

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Bibliographic Details
Main Authors: Ovaska, Seppo J., Dragseth, Roy E., Hanssen, Svenn A.
Format: Conference Proceeding
Language:English
Subjects:
Air cooling
Computation
computing performance
direct water cooling
high-performance computing
Liquid cooling
Power consumption
Power demand
Recycling
Retrofitting
Servers
Supercomputers
Temperature measurement
Waste heat
waste heat recycling
Water cooling
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Summary:Water cooling of servers is emerging to high-performance computing (HPC) platforms, not only due to the requirements on effective cooling of high-density server blades, but also for effective recycling of waste heat. In this poster paper, we compare the measurement results of two production-grade HPC racks of the Norwegian Stallo supercomputer: one with air-cooled CPUs and the other with retrofitted direct-to-chip liquid cooling. The performance and power consumption measurements were recorded for computer room temperatures 20-30 °C. It was observed that the median performance measures with water cooling were 0.8-1.4% higher than with air cooling; while the average power consumption with water cooling was 9.4-14.4% lower than with air cooling. During this study, the computation-intensive LINPACK benchmark was executed on all the servers.
ISSN:1558-058X
DOI:10.1109/SECON.2016.7506669