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16GB DDR3 1866 installed. (7.97GB usable) 7 Ultimate
So, i'm using 7 ultimate, and I've recently installed16GB of G.skill DDR 1866 mhz memory (2 8GB sticks). I've gone into the BIOS and manually set the speed to 1866, and the system is only showing about half of it as "usable" So the first thing I checked was of course the ram itself. I've reseatted the memory several times and made sure they're in the correct color coded slots. I've also tried checking and unchecking the advanced boot option in msconfig to use maximum memory. Here is a screenshot. Oh and yes I have the latest version of my BIOS. eeeeeeeeverything on my system is up to date.