I agree with Dave, vRAM licensing was dropped from 5.1 GA and 5.0U2.
If you are using 5.0 GA or U1, please upgrade to 5.0 U2 then you will not be able to see anything is related to vRAM licensing Model.
If you are using 5.1 GA/EP1, i would like to suggest you, please upgrade your setup to 51U1a.
Thanks,
Atul