Let's start off will a short little story about my life. At the beginning of December last year my laptop, HP pavilion Touchsmart 15" sleekbook, decided to go to ****. First indications pointed to the hard drive and when I called HP they said I needed to buy their $130 replacement to rectify my problems. Being fairly tech savvy and having a curiosity of how things work I decided to figure out a different solution. I found out that it was a problem with the boot files in windows. I used a rescue .iso from linux and saved some important stuff but I made a few mistakes and lost most everything else. I got a clean version of windows 8.1 enterprise and restored my PC. Everything was going fine I was slowly building back to the previous functionality I had gotten to over a year. Then on Christmas my hard drive crashed and the computer couldn't even boot. The drive was unrecognizable. I bought a replacement (upgrade) and I decided I wanted to get the most out of my rebuild so I ordered some more RAM...I was running on 6GB from the manufacturer there was a 4GB and 2GB in my motherboard. I didn't think there would be a limit to how much RAM I could use with windows 8 x64 bit, so I bought an 8GB module thinking I could double my RAM and run SolidEdge more smoothly and who knows what else. Unfortunately, I have recently learned that I am limited to 8GB of RAM with this specific chipset processor is AMD A6-4455m APU My knowledge is fairly limited compared to those that do this stuff professionally or are avid hobbyists. I would like to think that there is a way to get my system to use all of the memory I have provided it. I have been reading into it and I am still unsure as to why the chipset is limited to only having access to a certain amount of RAM. If it's x64 or x86 architecture there is no reason it shouldn't be able to access the upper limit of 64GB of RAM. If a x32 bit architecture utilizing PAE can technically use 64GB what limits a literal x64 bit build to such a low cap? My computer can "knows" how much is there. Windows only shows me 7.47GB is available when both sticks are mounted. When I have just either the 4GB or 8GB inserted it only shows 3.74GB although I remember seeing exactly 4GB at one point I can't get it to duplicate. When I have the stock (what came installed this PC was refurbished before I took ownership) RAM installed it shows 6GB but I didn't take a screenshot of that. In any case you can see on the first image that the computer sees all of the 12GB but for some stupid reason it only has access to 7.47GB and I am not going to give up without a fight. YOU WILL USE WHAT I GIVE YOU AND YOU WILL LIKE IT!!!!!!!!!!!!!!! I feel like there is a powerful computer somewhere on my lap, but it is just hiding within this thin black plastic case. IDK maybe I'm completely wrong. Someone please help.