If you are playing multiplayer, you will be right on the edge of performance and drop off with that setup. You may be able to push ultra textures but no Anti Aliasing, Anistropy or tessellations.
Like many synthetics you will find it grossly inaccurate but thats a different story. The HD 7850 will be a more prudent buy, at stock clocks its slightly underwhelming but slight clock bumps can have you gaming at GTX 580 levels.
ok thank you, btw with the i3 would i use the stock fan or after stock?
Not much point getting an aftermarket HSF on a non-overclockable CPU other than maybe 1) extra peace of mind of a cooler CPU and 2) use something that screws into a metal backplate instead of using push-pins so you never have to worry about the stock HSF loosening up in 3-4 years.
#2 is my main reason for using a Hyper 212+ in my current PC and it will be my main reason for using a 212EVO in my next PC.