What video card are you upgrading from? The 650 is the previous gen card. I'd look at a 750 or 750Ti. Yes games will be held back by your dual core C2D chip, however, this will depend on the game. Some games are not extremely CPU intensive and in those cases a nice GPU will shine just fine. In games that really hit the CPU hard especially in a dual core you will see some issues, but just pay attention to the games minimum specs. Have you looked at OCing that chip at all? If you can squeeze a higher clock our of that chip you might help your cause a little. You could only do this if your board supports it. If its a brand PC you probably can't. Just throwing that out there as well...