I have an FX 6300 oc'd to 3.9 megahertz but a bad graphics card the XFX R7 260x Double Dissipation. I want to upgrade my Graphics card because its not being able to run newer games well but If I do upgrade my gpu im afraid that my cpu will bottleneck lets say a gtx 1060 or a gtx 1080. Should I upgrade my cpu and mobo first or gpu. And if cpu first which one should I get and mobo?