E6520 Graphics Card

Hello,

I have a Latitude E6520, Service tag is 8KPY5R1.
Generally it should contain Intel® HD Graphics 3000 and NVIDIA® NVSTM 4200M.

Both msinfo32 and Device Manager show only Intel® HD Graphics.
How could I check if NVIDIA® NVSTM 4200M is present and working?

Thanks,

Zoltan