Turn 3x Full-Height PCIe Slots into 1x 60mm Fan

PCIe slots and configurations ThinkSystem SR665 pcie slot height There are two components to a PCIe slot: mechanical and electrical For instance, you can have a slot that is x16 mechanical pcie 40 gpu in 30 slot However, there is usually a cost increase incurred with higher lane counts PCIe Slot Differences Photo from 20050531pci-express-cards

pcie 40 in pcie 30 slot PCIe , HL, HH, x16, 16, 8, 4, 1 GPU can be supported only in slot 1 FL, FH=Full length, full height HL, HH=Half length, half height Slot 3 is