What Should to Do With Extra PCIe Slots?

can you put a pcie x4 in a x16 slot   Dan candy jar clusters slot

Next Generation Storage：1*PCIe x4 and 3*PCIe x4 Connectors EZ-Latch：PCIe x16 Slot & Connectors with Quick Release & Screwless Design

But yes, a PCIe x1 card will work in x1, x4, or even a x16 slot R can fit into all PCIe expansion slots, including x4, x8, and x16 PCIe slots There are various peripheral cards you can use with PCIe x1

free slot machines to play now 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 As long as the card physically fits in the slot it should work, PCIe is supposed to negotiate the best link over whatever number of lanes are