What are the top uses of PCIe x1 Slots?

PCIe Expansion Node full-height PCIe riser description pcie slot height A half-length PCI slot means that a full sized one cannot physically fit into the space alloted for that slot, due to something like a hard pcie 20 x16 slot The NVIDIA A100 80GB PCIe card conforms to NVIDIA Form Factor specification for a full- height, full-length dual-slot PCIe card

pciex1 slot The Riser from Dell™ fits into the PCI-E slot of your Dell System Riser cards are used to extend a slot for a chip or card in a fully loaded computer