Hi guys, i just got 2 x 4gb sticks of ram and when i put both sticks in my Mid 2010 MBP it got stuck at the loading screen. So i took out 1 of the 4 gb sticks and put 1 of my 2 gb sticks that came stock and it worked just fine. Computer boots up and reads the 6 gb of ram. I got the ram from best buy: PNY - Optima 2-Pack 4GB (8GB Total) PC3-10666 DDR3 SoDIMM Laptop Memory Kit http://www.bestbuy.com/site/pny-optima-2-pack-4gb-8gb-total-pc3-10666-ddr3-sodimm-laptop-memory-kit/4816107.p?id=1218533332124&skuId=4816107&st=pny%20ram&cp=1&lp=4 Has anyone else experienced this before? Is there something that i'm missing?