What are the top uses of PCIe x1 Slots?

What are the top uses of PCIe x1 Slots? pcie x1 slot function Looking at the PDF manual the board shows 4 slots, a PCIe x16, 2 PCIe x1, and a PCIe x4, but the key to that diagram indicates that the x4 pcie 8x slot This is a dual slot card, meaning it covers the first available PCIe 1x slot I have a PCIe 1x Firewire card and a PCIe 1x WiFi card Both cards function fine

pcie 8x slot M · NVME Adapter PCI-E x1 to M · NVME M · Dual Slot M · NVME SSD M2 PCIE 1x Adapter PCIE To M2 Adapter M · Multi-Function USB Hub eSATA SATA Port

pcie x1 slot function Lanes: PCIe supports multiple lanes, with different numbers of lanes providing different levels of bandwidth For example, a PCIe x1 slot GLOTRENDS PA21 Dual NVMe to PCIe X8 Adapter Without PCI-E X1 slot I must say, this little adapter has exceeded my expectations