Based upon http://www.cpubenchmark.net/cpu.php?cpu=Intel+Core+i3-3245+%40+3.40GHz&id=1934
the highest rated i3 chip is a Core i3-3245 @ 3.40GHz with a rating of - 4544
when you compare that to a factory spec fx-6300, which has a rating of - 6392http://www.cpubenchmark.net/cpu.php?cpu=AMD+FX-6300+Six-Core&id=1781
and if those synthetic ratings mean anything, then we are talking of a complete wash. I have tweeked my fx-6300 rig to stable current 5,04 GHz and when run the CPU benchmark, I got 9319, with Cinebench of 6.47pts.
As you can see, this chip with OC can dice with the i7's.
So I recommend, that you study your data more carefully and gather them from more than one source before you decide. I am not advocating an fx-6300 or any other chip, but as I just demonstrated, this very inexpensive AMD chip has quite a performance at factory settings, while giving the user (could be you as well) the potential to increase its performance by (9319-6392)/6392=45% Do you notice BINGO!