I am running a HD 7770 and an AMD A6-5400k but not in crossfire. On Battlefield 4, I have to turn the settings right down and still I only get 30fps, 40 on campaign. I think that my CPU is holding back the performance of my GPU and therefore I need to upgrade it. Do you think an FX 6300 will improve the performance or be a bottleneck? I have been a YouTube and some people have got their 7770 running on high-ultra settings so it must be a problem with my CPU. What would you suggest?