Does the PCI-e x1 Sound Card fit in PCI-e x16 Slot?

In general, yes it should run on a X1 slot, if it can fit as some x1 slots are open ended to allow bigger cards to fit But check around to get

1*PCIe x4 & 2* PCIe x4 with Thermal Guard · 1*PCIe x16 with Ultra Durable™ Armor · 2*PCIe x1

cantik 4d slot x1, x4 pci Cards fit into x16 pci-e Slot Yes they do the x8 cards do not as they are a

can you use ddr5 in ddr4 slot It has nothing to do with the slot chosen, if an x1 card doesn't work in the board's regular PCIe slot, then it's highly unlikely it will if