As most of you know the P45 P5Q deluxe runs crossfire at PCI-E 2.0 X8 on both lanes. Now so far my performance is outstanding and I cant really fathom it being much better than it is right now. I just wonder how much of a boost I could get from an X48 Board running a full X16 on both lanes? or if it would even be worth it? The reviews seem to be mixed on this, some show a difference while others show hardly any at all. I have a Gigabyte GA-X48-DQ6 on its way to my house that I purchased for $100.00 and the board should be here tomorrow. Im just having second thoughts on this purchase now and wonder if its gonna be worth the hassle of taking everything apart and installing this new board. Please keep in mind I like my Quad core CPU overclocked at 4ghz and im not sure how well the Gigabyte GA-X48-DQ6 series handles Quad Core CPU's. Also with the overclocks on my HD 5870's I wonder If they would benefit from more PCI-E bus width. Thanks for the replys.