PCI Express x4 network card into PCI-Express x16 slot?

Can a smaller PCI Express device be inserted in a larger slot and can you put a pcie x4 in a x16 slot Next Generation Storage：1*PCIe x4 and 3*PCIe x4 Connectors EZ-Latch：PCIe x16 Slot & Connectors with Quick Release & Screwless Design can i put a pcie 40 in a 30 slot I did contact the card manufacturer, and they said that putting a x4 card in x16 slot is called up-pluging, and they know for sure that these

canada slot Small form factor builders are usually restricted to a single PCIe slot on their motherboards If