So I'm getting a i5-2500k and a GTX 670FTW+. Since only the i7 can utilize the PCI-E 3.0 how badly will my i5 bottleneck the 670? I didn't want an i7 because of the HT and it's effect on games, considering I have a gaming rig. The mobo I'm getting is an ASRock Extreme4 Z77 if it makes a difference. Probably not.