I have two titan Xp? I can't sli it on the asus p9dws, since its only for crossfire. I didnt realize it until i tried it then found out the hard way. I also have a halo claro xt which requires a pci on motherboards, and i want to keep it. So, the question is, should i buy a new motherboard so that i can sli, which will cost a fortune, or should i just not sli and put away the extra titan xp which would be a waste i think?