Its not necessarily that the GPU isn't working right but it seems there could be some driver compatibility issues across the board on these chips right now. Personally, the fact you are only using 4gb of ram is my first guess on your current issues, especially the fps issues. The APU uses system RAM for both graphics and for system. In intensive situations, the GPU will use as much as 2gb in order to process graphics. Which leaves the rest of the system with 2gb. I cant tell you of any system on the market that would run 2gb in gaming without a multitude of issues. Upgrade your RAM to the 16gb you were speaking of. Sit back and wait for the progression of drivers. This is somewhat bleeding edge for AMD. A lot of the current motherboards on the market are being bandaided into working with this chip, even though they weren't initially meant for them. It may take time to fix the kinks across the market for compatibility. Otherwise, you may have to look into going the standard route of hardware that has been known and tested for years.