What is an expansion slot

The smallest of the PCI Express slots, your standard PCI Express x1 slot is essentially your starting point for most expansion cards, especially port expansions

IPCIE16XD11 is Multiple SFF-8654 x4 to PCIe x16 Slot Expansion with Broadcom MegaRAID 9560-16i, 9560-8i, 9580-8i8e, 9500-16i, 9500-8i,

pcie slot function It is possible to accomplish something like this with a PCIe bridge chip but mechanically this kind of arrangement using an ordinary PCIe slot

pcie 40 gpu in 30 slot PCIe was introduced as the small form factor interface alternative Mini PCIe or mPCIe is the miniaturized version of the PCI Express