For cudaHashcat to work you need to match this requirement stated on the download page ( https://hashcat.net/oclhashcat/ ): 346.x or later
Now, if you look at the nvidia documentations (for instance I have found this): http://uk.download.nvidia.com/Windows/Qu...-notes.pdf
It says on page 38: Supported Product NVIDIA Tesla K20(x/c/m/Xm/s) 64-bit OS only
But unfortunately within the *same* document it says (page 11: Legacy Support for Tesla architecture GPUs):
"Beginning with Release 343, the NVIDIA graphics drivers no longer support the Tesla generation of NVIDIA GPUs."
"The Release 340 drivers will continue to support these products until April 1, 2016 ... future driver enhancements and optimizations in driver releases after Release 340 will not support these products"
So, the information within this documentation is kind of conflicting. I would recommend to download a driver that meats the minimum requirement for oclHashcat/cudaHashcat , hence >= 346 and see if the installation and the driver works nevertheless.
Now, if you look at the nvidia documentations (for instance I have found this): http://uk.download.nvidia.com/Windows/Qu...-notes.pdf
It says on page 38: Supported Product NVIDIA Tesla K20(x/c/m/Xm/s) 64-bit OS only
But unfortunately within the *same* document it says (page 11: Legacy Support for Tesla architecture GPUs):
"Beginning with Release 343, the NVIDIA graphics drivers no longer support the Tesla generation of NVIDIA GPUs."
"The Release 340 drivers will continue to support these products until April 1, 2016 ... future driver enhancements and optimizations in driver releases after Release 340 will not support these products"
So, the information within this documentation is kind of conflicting. I would recommend to download a driver that meats the minimum requirement for oclHashcat/cudaHashcat , hence >= 346 and see if the installation and the driver works nevertheless.