@@ sayan: the question above has been answered in the other thread.
I would advise againt ocing the card primarily because at this wonderful low resolution, its not the gpu in picture but the cpu instead. Basically at low resolutions your GPU isn't working that hard so it's more how many frames can your CPU push though. As your resolution/detail/AA is increased though, the GPU has to work harder and harder to keep up with the CPU and eventually becomes the limiting factor.