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Extreme GPU Computing
Page 12
Figure 11: NAMD power consumption and relative power consumption compared to CPU-only
The power consumption and relative power consumption shown in Figure 11 for GPU configurations is
about 2.1X to 2.3X resulting in accelerations from 4.4X to 7.8X. From performance per watt
perspective (an acceleration of 7.8X for 2.3X more power), configuration C does the best. The power
consumption of D is higher than E due to the additional CPU and improved utilization of GPUs resulting
in better acceleration.
As shown in above the K80 GPUs can substantially accelerate NAMD in a power-efficient manner. The
balanced configurations seem to do better with NAMD. Configurations C and D are best for NAMD, but
the particular choice depends on required GPU density/U.
Four K80 Boards
Two K80 Boards