the processor is slow. but its dual core and it should help you get way better framerates then with your 3400+. But the package your looking at is OEM which means no stock fan for the cpu. So you will have to buy a fan for it
But if you want something really crazy get this.. $70 more
Props to Rohan for showing me this..
The processor has 4 cores and according to benchmarks, its 6 times better than the processor your looking at, and it does come with a stock fan and heatsink. the mobo supports pci x16 2.0 (your hd 4830 doesnt have to be in a 2.0 slot but it does increase the bandwith)