can you put pcie 1x in 16x slot

Software. slot anti rungkad 777 Windows 2003 ent server as workstation (kills xp in perf and stab) Oct 23, 2006 #4 pci-e slots by spec are sposta be downword compatable with all pci-e cards so yeah 1x,2x,4x cards will work in the slots above them (if they will "fit" they will work) my buddys got a pcie 4port nic thats 1x in a 16x slot