Planetside 2 from what I've heard/read is really buggy and in need of some drivers or work on the dev side. If this is the only game then there's your answer.
I'm assuming it isn't the 995 but the 955? If so it is balanced well with that 560.
Try another game if its fine then you have yourself a game with bad optimization or drivers.
From what you just posted it sounds like it is a bottleneck. I would try playing a different game and monitoring the performance tab in the task manager. If the cpu usage is close to 100% then it is bottlenecking your system.