Your CPU isn't going to be bottlenecking your video card at all, so this list (for your video card) should give you a fairly good idea of how well your system is going to preform.
^That all depends on the game.
CPU bottlenecking=any time the CPU keeps your GPU from running at 100% all the time (provided you have Vsync off and no frame-limiter.) For instance, Crysis 3 seems to be incredibly CPU-dependent. And any RTS will choke on your CPU before your GPU, especially something with plenty of power like the HD 7950.
That said, Anandtech's tools will give you a great idea for how a GPU will play games with that CPU. Since they use a very similarly-performing CPU to bench with.