Hi,
as first source please go to NVIDIA Virtual GPU (vGPU) Software Documentation
K2 is end of life for a long time already. You won’t get any advise for K2 and you cannot even buy the board any more. We just released support for Tesla Pascal boards like P4, P40. These are the way to go. With vGPU as example you can put 24VMs with 1G FB on a P40. Be aware you also need to buy licenses in addition to the hardware. Therefore please check our documentation for further advise or contact a NPN partner.
regards
Simon