QuickSpecs

QuickSpecs
HP Z420 Workstation
Technical Specifications - High Performance GPU Computing
c04111468 — DA – 14261 Worldwide — Version 40 — January 1, 2015
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Boost Clock: up to 875 Mhz
2888 CUDA cores
Power Consumption
~235 Watts
Note 1: A 1125W PSU is required for any K40 configuration on the Z820
Tesla K40 GPU Boost
By default the Tesla K40 active ships with the core clock set to the base
clock. HPC workloads can have one or more characteristics as described.
When selecting one of the supported boost clocks a good strategy is to
characterize the workload with the available boost clocks. For example,
DGEMM/Linpack are extremely demanding on power. Therefore, the "base
clock" may be the correct choice when running Linpack. Some workloads in
life sciences, manufacturing, CFD, CAD, etc., may have power headroom
and can take advantage of one of the boost clocks.