A:Answer the video memory that dedicates is dependant on the memory chip you add to it, the 4gb chip it comes with alots 512mb, however the system uses the rest of the memory as dynamic so you get more memory for games, that is why I play GTA V on it with no problems just have to set ignore limits. with an 8gb chip it alots 1024 video ram. I'm not sure but my guess is the more memory u add the more it will a lot to dedicate for video, haven't tested it as of yet but will soon by adding a 16gb dd4 chip.
