This was going on for quite some time now, but it just recently had gotten worse. For the longest time, probably 3-4 months it has been showing 12GB of RAM(7.99 usable) and just the other day I kept getting a lot of errors stating that programs needed to close because of low memory and when I checked it showed that I had 12GB of RAM(3.99usable). So I didn't necessarily change anything for it to do this so I am not sure what initially could have caused it. I never "reset" the CMOS, but I did load the default for the BIOS settings figuring that may have cured the problem but it didn't. I can't really get to my reset CMOS button on my motherboard because of how I have my second graphics card in there and then the PCI Extender in there for my sound card. So I could've had to take all of that out in order to reset it through the button if that needed to be done. I was able to pull the battery out though when I was fiddling with the RAM sticks so again, it could have been that as well. Hard to tell but it is fixed now and I hvae all of my RAM usable again.