I really want to replace my i3-3220 cpu with either an i5-3450 or an i5-3470. I have a gtx 660 installed and I feel like the dual core i3 is holding it back. Right now, the most demanding game I own is AC4, and I probably get around 30fps average on medium settings. Will upgrading to either of those cause a noticeable increase in performance? If not, what would be a good quad core cpu for $200 or less?