Correct a GTX 660TI or a GTX 670 with 3.0 are compatible with a 2.0 pci-e express slot on the motherboard. About your processor, I have the same one but I overclocked it to 3.80 GHz. That processor should be fine with a little bottlenecking with the GTX 670 on cpu dependent games (like Battlefield 3)but is like removed with a good overclock. I wouldn't recommend people to overclock right away. For overclocking you need to have good airflow and a good cooling system. It takes a lot of time. People who say that they are able to get a system stable in 5 minutes are just not overclockers with a stable system. Read more about overclocking and think about it before even doing it and also very important is know the risks. Yeah a lot of people just keep saying overclock blah blah but they have no clue what dangers the users are put into if done incorrectly. Anyway a long speech but a GTX 660TI or a GTX 670 should be able to run fine on that CPU
. About manual overclocking, there is really no need to overclock it unless you are one of the geeks who want to put the most out of a card but I assume you are not one of them
. Such high end cards run fine with the latest games without any overclock.
- Fastreaction