I am planning on upgrading my horrible GPU from GeForce 210 to something more decent. However, before I decide on upgrading my GPU, I checked the details of my GPU through dxdiag. I noticed something weird. On the Approx. Total Memory, it say it is 4050MB. Shouldn't it be 512 or 1024 MB only? Why is it 4050MB?
Here is a picture of it.
Thanks in advance for any assistance.
Here is a picture of it.

Thanks in advance for any assistance.