Can I install a pcie x1 card in full size pcie slot?

1 additional PCI-Express x1 slot is needed

Yes, all PCI-E x1 cards will run in a x4, x8 and x16 slot I ran my wireless PCI-E x1 card in the 3rd x16 slot in my Maximus Extreme

pcie2 slot Ensure the GPU PCIe connector is fully inserted into the PCIe riser cable socket and motherboard PCIe slot when powered off PCI-E X 16 EXPANSION SLOT, 3

pcie 20 x1 slot Convert PCIe x1 slot to open ended Is there a safe way to cut the closed edge? Unfortunately, most manufacturers currently produce only