PCIE Bifurcation Page 27 - ardForum

height cards are not designed to fit in low profile slots SuperMicro does have chassis that support full height cards in that form factor

The number after the x tells you how many lanes that PCIe slot has A PCIe x1 slot has one lane and

pcie x 16 slot PCIe x16 slot, but expose two additional x8 slots And a bit of fiddling to secure everything in a case (to make it worse, half-height

pcie4 slot Riser Cards and PCIe Slots · 1-slot PCIe riser module: x16 Port0 00000 - Full-height half-length · 2-slot PCIe riser module: x8 Port12 00