Just curious, how much memory are each of your eve instances using up? I think mine used ~600mb with all the details turned down as low as possible.

But you will see a huge improvement going from a p2 x4 to either the 8150 or 3930k. 8150 has pretty terrible single-threaded performance, it only shines when all 8 cores are utilized, and even then won't outpace an intel proc.