When passing your full system's specs, list them like so:
CPU:
Motherboard:
Ram:
SSD/HDD:
GPU:
Chassis:
PSU:
OS:
Monitor(and it's resolution):
^ Being as specific as possible.
Simple answer, the performance boost will not be by much, minuscule if anything. I played on BF3 with an Intel Q9550 with a mild overclock+HD6870 with also a mid range overclock and I achieved playable frame rates at 1080p with high settings. We're dealing with two Dual Core processors here with a slight bump in frequency and cache. If you got something like a a Q6600 or a Q9550 then that would be a significant upgrade from what you currently have.
Contrary to what has been said, you can't overclock on that Intel board since it's got safeguards implemented...