gmarkostamos :
will an overclock of about 500-1000ghz help in my case of an amd cpu ?
I'm not sure how far you can safely over clock your CPU.
You certainly need an after market CPU cooler to attempt this at all.
If you can get to 4.3 GHz, which the over clocking posts for your CPU suggest is reasonable, this should get you to a minimum frame rate of 42 in their benchmark, just better than a core i3 at 3 GHz but still well below a Core i3 4360 at its stock clock rate or 3.7 GHz.
Unfortunately I think if performance in this game is important to you, you will have to look at an upgrade to a core i5.
A good value combination would be say a H97 motherboard and Core i5 4590 CPU.
You can keep your existing RAM if you want, or try to sell the FX-6300 with motherboard and RAM then buy new RAM for the Core i5.