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Figure 3: Total power and performance/watt on the five C4130 configurations.
Figure 3 shows the power consumption data for the HPL runs in Figure 2. In general, GPUs can consume
substantial power when loaded with compute intensive workloads. As shown above, the power consumption of
configurations “A”,”B” and “C” is significantly higher (2.9X to 3.3X) compared to CPU-only runs; this is due to the
four K80 GPUs. Power consumption of “D” and “E” is lower (1.8X to 2.0X compared to CPU-only runs).
The power efficiency, i.e. the useful work delivered for every watt of power consumed, is in the 4+ GFLOPS/W
range for quad GPU configurations and about 1.8X to 2X range for dual GPU configurations. Configuration “C”
offers the highest Performance per watt at about 4.23 GFLOPS/W.
Compared to the CPU-only performance per watt of just 1.5 GFLOPS/w, the quad GPU configurations show a 2.7X
and dual GPU configurations show a 2.3X improvement in the overall performance/watt.
In conclusion, the C4130 meets the current challenges of a high-density accelerator-enabled compute node.
Targeted specifically towards the HPC market, it offers world class performance and unique configurability options
to fit extreme HPC requirements.