E675 – P67 SLI
PCIe slot 1: 16x (8x if slot 2 is filled)
PCIe slot 2: 8x
PCIe slot 3: 4x
E679 – P67 FTW
PCIe slot 1: 16x (8x if slot 3 or 5 is filled)
PCIe slot 2: 1x
PCIe slot 3: 16x/(8x if slot 1 or 5 is filled)
PCIe slot 4: 8x
PCIe slot 5: 16x/(8x if slot 1 or 3 filled)
PCIe slot 6: 8x