Top uses of the PCIe 1x slot on your motherboard

There are two possible meanings for PCIe1: PCIe and PCIe x1 PCIe refers to any PCIe slot which uses the first version of the PCIe

2 PCIe adapter ONLY supports PCI-e NVMe based M Key , NOT supports any SATA based SSD Fit for PCIe x1x4 x8 x16 slot

x16 slot Figure shows a motherboard with two x1 PCIe, two x16 PCIe, and three PCI expansion slots Notice that the PCIe x16 slot has a retention

x1 slot PCIe x1: This is the smallest PCIe slot and has a single lane for data communication PCIe x1 slots are often used for less demanding expansion cards, such as