Hey, I'm looking to buy my g/f some memory for Christmas. I'm 90% sure she has a MBP 4,1 (either a 4,1 or a 4,2, I don't have the computer in front of me). I was looking at buying this memory: http://www.newegg.com/Product/Product.aspx?Item=N82E16820145193 This will work, correct? Also, would doing 6GB with this combo be feasible? : http://www.newegg.com/Product/Product.aspx?Item=N82E16820220495 http://www.newegg.com/Product/Product.aspx?Item=N82E16820220229 Reason I ask is I remember somebody saying at one point that 4GB was the 'cap' - but it used 6GB fine, and 8GB made it laggy. Forgot where I heard that, though, might just be a myth. Would 6GB cause speed problems due to it being dual channel with a 4 & 2? She keeps every ****ing application possible open at the same time, hers only has 2GB, and it's nowhere near enough, so it's paging like a bitch and making the computer slow as all hell once she's used it for about a day. TIA!