What's up Macrumors Forums, I have created an account to seek advice about a single stick of 8GB RAM (ddr3-12800) I bought for my Macbook Pro (Mid 2012). The problem being that the computer does not start with the ram inside the computer, I would press the power button then after a second it would turn off. The screen also does not light up. Keep in mind this is a fully functional computer with 4GBs of ram. I tested the same stick of ram inside another Macbook Pro (Late 2009) and the computer was fully functional. Help would be much appreciated 