Hey guys! This is probably the second thread but the thing is I am planning to upgrade the RAM in my current cMBP 13 inch base model (Mid 2012) to 16GB and I've been hearing a lot about these speeds and etc. First thing I want to clarify is that will I be able to use 1333Mhz RAM as the MBP currently holds two 1600MHz sticks? I read on the Apple Support forum that they wont and will make a beep sound once installed. Could someone please clarify? If I can use 1333MHz I'd probably go for Corsair Macmemory or 2xGSkill. If not for 1600MHz Corsair Mac Memory or similar GSkill model. There is roughly $30 price difference between those speeds. Money is bit of trouble for me. Which would you suggest?