Project Olympus 3U PCIe Expansion Server Deep Dive -

slot is dependent on how many lanes the PCI-E bus has A PCI-E x1 slot, which has just one lane, takes up almost no space on the motherboard, while a PCI-E x32

That will work for old cards, but it can't go back to PCIe The riser slot on the motherboard x32? so I tried to Google around From

pcie 4 ssd in pcie 3 slot Slot Position Any, LHS, RHS Design Type Any, Passive, Active Output Type Any, Micro LP, NVMe , PCI, PCI-E, PCI-E x16, PCI-E x2, PCI-E x4, PCI-E

pcie 30 in 40 slot you can use 3pcs PCI express card on your through mini PCIe slot on the motherboard, this is NOT