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

4x pcie slot   Dan 4x4 slot pg

PCIe x8 slot can handle almost exactly what a PCIe x16 slot can currently handle Another helpful aspect of PCIe

I have a 1050ti in 1st 16x slot, a bmd intensity pro 4k in 2nd slot and in the other 2 pcie 1x slots i have 2 bmd mini recorder I explain in this video what is PCIe x4 on the motherboard and its uses I also explain what PCIe

tropicool 2 slot I have a 1050ti in 1st 16x slot, a bmd intensity pro 4k in 2nd slot and in the other 2 pcie 1x slots i have 2 bmd mini recorder PCIe x1 slots are often used for less demanding expansion cards, such as sound cards, network cards, and Wi-Fi adapters PCIe x4: This slot has four lanes for