i have a sabertooth 990fx and my gtx680 is in the top pci-e port that covers the pci-e x1 slot for the creative zx
my question is if i sli two 680 and plug the creative zx into on of the pci-e x16 port on the bottom will the motherboard enable 16x8x8 or is the motherboard smart enough to know only to enable 16x16 for the two 680s and that a sound card is pluged into the extra x16 port?