What are the top uses of PCIe x1 Slots?

Motherboards with a good number of PCIe slots 16x pcie slot if the slot is open like that, you should be good to go if it's not open, you could a) use another riser to adapt the x8 to x16, or b) zeus iii slot A PCIe x8 card will fit in any PCIe x8 or PCIe x16 slot PCIe cards larger than the PCIe slot may fit in the smaller slot but only if it is open

slot machine glass Yes, you can put a PCIe X16 card in a X8 slot Electrically, there is no difference between the two as they both receive the same 75 W of power