Yes, you can install a 1x PCIe card into a 16x or 4x PCIe slot

NVMe x4 adapter card for PCIe x1 slot pcie 1x slot PCIe slots are used to connect graphics cards, sound cards, other interface cards and some pcie 40 in 30 slot PCIe x1 slots replace the standard PCI port and are about 1 inch long They move data on and off the motherboard at up to 250 MBps in

pcie 8x slot Ever wondered how you can jam a PCIe 16x card like a video card into a PCIe 1x slot? Now you