E757 – X58 LE SLI
PCIe slot 1: 16x
PCIe slot 2: 8x
PCIe slot 3: 4x
PCIe slot 4: 8x
E758 – X58 SLI
PCIe slot 1: 16x
PCIe slot 2: 16x (8x if slot 3 is filled)
PCIe slot 3: 8x
E759 - X58 SLI Classified
PCIe slot 1: 16x
PCIe slot 2: 16x
PCIe slot 3: 8x
PCIe slot 4: 16x (8x if slot 3 is filled)
E760 - X58 SLI Classified
PCIe slot 1: 16x (8x if slot 2 is filled)
PCIe slot 2: 8x
PCIe slot 3: 16x (8x if slot 4 is filled)
PCIe slot 4: 8x