Hi all! I've got a Dell Latitude e6420 with Intel i5 2.5 gHz, witch has a dedicated N-vidia NVS4200m vga. The problem is that the nvidia control panel says it has only 512mb. The laptop was sold and advartised to me with 1gb vga. I google my way deep, and most of the sites that has something about this vga says that up to 1gb. Those that means that someting is lowering my vga memory or what?