I need your guys suggestions on if I should purchase a GTX 670. My processor is a Q9300 Core 2 Quad with 8GB RMA. I currently have a GTX 560Ti that runs pretty good, but looking for better frame rates. Would there be any difference, or would the processor bring the GTX 670 down a bit?
Should be fairly obvious, it would be a bottleneck. The Ram is good, that is enough for gaming, however if you really want to get better frames my first recommendation would be to upgrade your CPU. If you're on a budget, go for an i3, however if you are not, you should probably go for an i5. I will recommend the 3570k, however if you don't have an overclockable motherboard, you should go for an i5 3550, or a motherboard that supports 1155, then you should go for a Asrock Z77 Extreme 4 coupled with a 3570k.
The 670 is a great card, but its definitely going to be held back by that processor.