It depends on what you need, Intel 4000 is integrated, and uses system RAM to operate. Upgrading to ram increases the ram dedicates to video, for example I'm running 16GB on my 6.2 and that bumped the VRAM to 768MB, the OS may be able to Modulate this up to the intel limit (2Gb I think I read somewhere, but don't quote me) But I haven't seen it yet. Keep in mind this will always be DDR3, which is slower than a dedicated card. If DDR3 isn't fast enough for you, Thunderbolt may someday be your solution.