pcie x4 card in pcie x1 slot

You can put smaller cards in a larger slot, but not the other way around So a 1x will fit in a 16x or 8x slot but a 8x won't fit in a 1x

A PCIe x1 slot has exactly one PCIe lane to use, and the same rule will generally apply moving up the ladder through x4, x8, and x16 slots Each available PCIe

candy jar slot My motherboard has three pcie x16 size slots, but I cannot use one of them for usb controller pcie x4 card: the pcie16_1 is for GPU, the

candy slot png So, to answer your original question, if you're happy to abandon any other PCI devices you currently have, you can choose a motherboard with more PCIe x1 slots;