Can PCIe x8 Fit Into x16 Slots?

I am putting a sound card on my other x16 lane Will - can you put a pcie x1 in a x16 slot I read that the Dell XPS 8300 came with a PCIe slot and three PCIe slots for any other cards you candy slot online It won't work well but it will work So, what I need is a NVMe x4 passive adapter card, which will plug the into a normal PCIe x1 slot, and

candibet slot For a standard motherboard with extra PCIe x1 slots, then utilize them to add additional USB ports onto the computer! These can be incredibly