According to the Nvidia's chart below, GTX560 Ti should give 40-60 fps (ave) at 1920x1080 at High Quality. But then the assumption is that the CPU is not the limiting factor.
For your case, your E7200 (2 cores, 2 threads) is the bottleneck, IMHO. It has only 2 cores and without Hyper-threading. For modern games, it is not only the core speed (even at 4+ GHz) but also the number of cores that contributes. You need at least a tri-core CPU nowadays. The bottleneck is magnified by the lowly resolution of 1400x900 as well.
Your graphics card is well ahead of your monitor and your CPU.Edited by windfire - 11/7/11 at 6:25pm