QuickSpecs

ftp://download.nvidia.com/novell or http://www.nvidia.com
Processor Cores GK110B GPU
Base Clock: 745 MHz
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.
QuickSpecs
HP Z420 Workstation
Technical Specifications - High Performance GPU Computing
DA - 14261 North America — Version 36 — March 1, 2014 Page 57