I recently purchased a GTX 560 graphics card, but I feel that it's not performing like it should be based on some tests I've run. I'm wondering if the CPU is the bottleneck; I'm running an AMD Phenom II X2 545 Callisto 3.0GHz dual-core. But I'm also using DDR2 RAM, so I'm not sure if I should upgrade my CPU or get a new mobo and DDR3 RAM.
Any input? I'm sorry if that's not enough to go on, I can add more specs when I get home.
EDIT: I mostly use the computer for gaming, but I also use it for writing music\sound editing. Also my mobo is the Abit ax78