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.