Will PCIe x1 x4 cards work in x16 slot?

Yes, you can install a 1x PCIe card into a 16x or 4x PCIe slot pcie 1x slot The embedded PC also sports a pair of mPCIe PCI Express Gen3 expansion slots xPCIeSATA), and a single PCIe104 slot According to MPL, the pciex16 slot 2 Answers 2 Any PCI Express card of a smaller size will fit into a larger slot So an x1 card will fit in an x8 slot Please see the Wikipedia

pcie slot width I have 2 x16 pcie and 4 x1 slots I have 2 x8 cards in the x16 slots, but need basic display adapter functionality for debian xfce