Will PCIe x1 x4 cards work in x16 slot?

Two types of PCIe slot on an Asus H81M-K motherboard Various slots on a computer motherboard, from top to bottom: PCI Express x4; PCI Express x16; PCI Express

I explain in this video what is PCIe x16 on the motherboard and its uses I also explain what

pcie 4 nvme in pcie 3 slot You can put anything smaller than the slot in just fine It's the PCI-e bracket screw that really holds things into place I'd get the newest

pcie 8x slot So your adaptec x4 card will run at x4 in a x16 slot It's a good sign the x1 card works, but still isnt proof the x4 will work Ideally for