Hi, I wanted to up my RAM form 8G to 16G so I bought the identical RAM sticks (g.skill RIP JAWS gaming series) and my motherboard (MSI z77a gd65) has 4 RAM slots. I figured I would just be able to plug them in and go but that isn't the case. I was wondering if somebody could help me out. I haven't tried overclocking my computer yet because its not set up properly for that. I was wondering if motherboard can only operate on 4 RAM sticks if overclocked as well.