Hi, I aquired a a Lattitude e6520  and look up to the specifications and it only has the intel graphics 3000 setup. I've seen that this model is supposed to have a Nvidia NVS 4200M...but the original configuration for this service tag model says that it only has the intel graphics chip. So i want to know is it is possible to opgrade the graphics power instaling another card and which are compatible with this one.

Thanks.