I'm choosing between three laptops. All of them have an i7-3630QM @ 2.4 ghz with Turbo Boost @ 3.4 ghz but have the different graphics cards noted in my question. The 675M has 2 gb of video ram but the other two have 3 gb. I'm niot looking for anything superior. I just want to be able to play today's games at full speed like the rate of a PS3 Xbox 360 or Wii game would play.