The graphics card is GTX 670 and it's pci-e 3.0. Does that make a difference or no?
No. Assuming you have an IB CPU you're effectively doubling the PCIe bandwidth as @DJDeCiBeL stated. Even x8/x8 PCIe 2.0 on ANY HD monitor isn't even remotely close to saturation regardless of what settings including any AA setting.
Yes I have Ivy bridge. i7 3770 3.5ghz. I remembered reading something about ivy bridge only being compatible with the pci-e 3.0 that's one of the reasons that pushed me towards getting it. That was a good link thanks.
/edit: Those aren't SLI though are they? Does it make any difference in SLI?