sammyssb :
That is very interesting! I am running 8GB of 1866 RAM in single channel. Another question. If i can borrow another dimm of ram from someone would it have to be the same frequency?
Hi Sammyssb - Yes, that is definitely your problem, and yes it will make a big difference in game fps. Like chuyayala said, if you can return the single 8gb stick for 2 x 4gb sticks (buy a 'kit' with 2 matched sticks) you will be all set. If you try to use different speeds (and/or different rated timings) then you will need to find the speed and timings that both sticks will run stably (so both sticks will end up running at the lesser stick's settings). For gaming 8gb will be plenty for the life of your system, so going to 16gb is overkill. So see if you can return the single 8gb stick and get 2 x 4gb sticks.