PCIe expansion slot definitions Slot Type Form factor Connector link width Negotiable link width 11 PCIe 3.0 FL, FH2 x16 16, 8, 4, 1 2 PCIe 3.0 HL, HH3 x8 8, 4, 1 34 PCIe 3.0 HL, HH3 x16 16, 8, 4, 1 1 GPU can be supported only in slot 1.2 FL, FH=Full length, full height3 HL, HH=Half length, half height4 Slot 3 is unavailable when a Smart Array type-a modular controller is installed in the system.