I looked at the pictures and knew right off you had an AMD GPU and after looking at the pictures I noticed that you listed one.
Personally, I use rather low settings for a variety of reasons, but more has to do with frame drops. Here's my settings but you might need to lower yours and/or the resolution lower. Also, you might want to try slightly under or overclocking you GPU. My settings -> http://i.imgur.com/SdCHK2F.jpg