PCIE x1 card in PCIE x16 slot?

Uses for PCI-e x16 Slots OTHER THAN GPU's? : rhardware pcie x 16 slot List of Motherboards with 4 PCI-Express x16 Slots: ASUS Pro WS TRX50-SAGE WIFI, GIGABYTE A620M C, GIGABYTE B650M C V2, ASUS Prime B760M-A AX, GIGABYTE B760M pcie 30 x1 slot 2 SSD, Support PCIe x4 x8 x16 Slot USB Type C ·

pcie m2 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