http://uk.asus.com/Motherboards/Inte..._1366/P6X58DE/
it has 3 pci x16 slots, you could use the top and bottom ones to have a gap in between if the sli bridge reaches (probably doesn't)
but yeah, the looks of that image there's onyl 1 pci slot between each of the x16s, using 2 slot graphics card = no room
supports 3 way sli .. as long as you don't mind 2 of them having no space for the fan :P