Which GPU allows Memory management?


I want to know which GPUs are allowed to use this new CUDA 6.0 feature.

In our company, we have 4 nVIDIA Tesla C2050 which don’t support it. (I think so…)
Now, we are going to change the servers and we are thinking about Tesla K20, K20x or K40. But first we would like to know which ones support memory management.