Usable Ram Nothing Working

[TheWhitakersrock]

My MSI A78-E35 motherboard only has two ram slots, I have an 8Gb ram and a 4Gb ram installed and both are recognized with details about each by multiple applications such as AMD Overdrive. However only 7.94 is usable and only 8192MB shows up in the BIOS, even though when I go to board explorer in bios both are shown as installed. I had the same problem trying to use two 4GB sticks Ive tried many solutions but none seem to work, any advice?

http://i.imgur.com/ldlCbHu.png?1

http://i.imgur.com/2QoDB58.png?1

 

[Tradesman1]

Duplicate thread -closed

http://www.tomshardware.com/answers/id-2936281/usable-ram.html