Hi chaps, I bought 2x 4Gb RAM sticks for my 15" 2.4Ghz i7 Late 2011 MacBook Pro a while ago. More recently I upgraded to 16Gb, and have the 2x 4Gb sticks spare. My sister has a 15" 2.3Ghz i7 Mid 2012 MacBook Pro, which she got with 4Gb RAM, but she's regularly exceeding it. My RAM modules run at 1333Mhz Hers run at 1600Mhz Both are 204-pin SODIMMS Both are DDR3 Electrically they look identical, barring the speeds. Would my 2x 4Gb sticks work in her 2012 MacBook Pro?