For a 960, there may be a little. I had a 9550 @ 3.2 paired with a 460 GTX years back and I felt that was a balanced build. The 960 GTX has a similar performance level to a 580 GTX which would be a small stretch for a 9550. You'll most likely notice a hit in CPU based games. That's where the Core2 is going to show it's age.