Computer fps drop when gaming someone help please!?

You have a bottleneck on your GPU's power resulting from your lower end CPU. A bottleneck occurs when one component is too fast for another component to fully process what is going on. For instance, I can go out and buy a 500 dollar GTX 580 right now, but if my CPU was something llike an AMD Athlon , then I would be getting pretty low fps because my CPU is bottlenecking my very fast GPU. Does that make sense?