AME will give up resources as needed while you're doing 'other things', so there should be no problem doing those other things.
What exactly do you mean by "the graphics are slow"? How much VRAM in installed on that 460M?
What I mean, is that the graphics (windows, menus, pictures) take long time to "refresh", is like when you doesn't have the video drivers installed, also if I play a video, even in youtube is playing with "jumps"
The VRAM is 1.5 gb.
Thanks, and sorry for my english!
I found the problem, was the file that converted, looks like the compression affect the render, all the other files render as normal.