HPC in Asia:
(RP01) CPU Water Cooling Temperature Effects on the Performance and Energy Consumption
TimeWednesday, June 19th10:10am - 11am
DescriptionEnergy efficiency has become one of the critical element for data center operation. Recently, hot water cooling technology is famous as an approach to reduce power consumption for cooling and to improve PUE (Power Usage Effectiveness). In the hot water cooling, since the cooling water temperature is higher than the outside air temperature, a part or all of the exhaust heat is naturally cooled by the outside air. Therefore, it is possible to reduce power consumption for cooling. On the other hand, recent Intel architecture based CPU has a mechanism to automatically lower the clock frequency when it gets hot to prevent thermal runaway and failure. And in general, the power consumption of the CPU increases as the CPU temperature becomes higher as the leakage current increases. To fairly evaluate the effectiveness of the hot water cooling from the viewpoint of energy efficiency, the effect of increasing the power consumption of the CPU, the impact on degrading the performance and the effect of lowering the power consumption for cooling is needed to take into consideration. In this poster, we try to evaluate the impact of increasing the power consumption of the CPU and the impact on degrading the performance qualitatively and systematically by investigating the change in sustained performance and power consumption when CPU cooling water temperature changes.