Hi, This is very weird... I checked on the Apple site, that my model is supposed to have 384MB of VRAM, but when I check my System Information, it shows that I have 512MB of VRAM. Although, to get 512MB of VRAM, you need at least 8GB of RAM, but I have 4GB. It is the base model, not Retina model. And the GPU is Intel HD Graphics 4000 Any thoughts?