Can't look just this second as I am not at home but... The 2010 MBP's not only were upgradeable, they had instructions on how to do it in the owner's manual, and it didn't void your warranty to do so As long as you didn't mess anything up inside, of course. I'm pretty sure the 2011's are the same, didn't even think to look. You can certainly upgrade it, anyone that told you that you can't was misinformed. It may no longer be supported by warranty/instruction book though I guess, I'll look later.