I just bought a Mac Mini (2012) and noticed that it takes a different kind of RAM than the extra RAM I have on hand. What is on the included RAM is PC3 12800 and what I have is PC3 10600. I put the RAM in and there doesn't seem to be an issue... though my iTunes does seem pinwheel a bit. Not sure if that has to do with that I have 800gb (on the 1TB 5400rpm HDD, I have my OS on a 256gb SSD) of content or the RAM. Can anyone tell me the difference between the 2 types of RAM and if it's OK to use PC3-10600?