pci 3.0 cards do not use all the bandwidth of pci 2.0 except for
maybe multi card configurations. so thinking that a pci 2.0 card will make a difference is erroneous using that line of logic.
honestly that cpu overclocked to 4.0Ghz will not bottleneck ANY graphics card, now there are some games that will cause a load on it and slow down the overall performance but, it isn't really a bottleneck.
shoot for the moon and be happy.
Exactly right. For the most
part, when it comes to game performance, he is still going to be more limited by the GPU than anything else.