My motherboard a Gigabyte UD3H-B3 Z68X is a PCI-Express 2.0 motherboard now my question isn't about performance difference between PCI-Express 3.0 and 2.0 because I know right now it's really nothing in terms of gaming performance. But when I decide on SLi'ing 2 GTX 670s on my motherboard and my motherboard does sli 8x/8x and nto 16x/16x. Will there be a big difference in performance? Thanks ahead of time.
http://www.newegg.com/Product/Product.aspx?Item=N82E16813128498 (my motherboard)
http://www.newegg.com/Product/Product.aspx?Item=N82E16813128498 (my motherboard)