What are the top uses of PCIe x1 Slots?

I want to use this slot for a 10GbE SFP+ network interface card I would only be able to use one PCIe lane, of course, but that would still

The number after the x tells you how many lanes that PCIe slot has A PCIe x1 slot has one lane and

pcie slot dimensions 1 x PCIe x16 PCIe x16 2 x PCIe x16 1 x PCIe x16 PCIe x1 5 x PCIe x1 3 x PCIe x1 2 x PCIe x1 1 x PCIe

pcie 4 ssd in pcie 3 slot See, the configuration is like this 1 Slot 1 = PCIe x16 slot at x16 speed I have my GPU connected to it 2 Slot 2 =