what goes into pcie slots - What is a PCIe Riser? - Linux Hint bonus 888 slot

A PCIe riser card is made up of a x16 GPU adapter, where the GPU goes in, and a x1 or a x4 GPU adapter that goes into the motherboard’s PCIe slot.

PCIe x1 slots have only one PCIe lane. Despite having only one PCIe lane, PCIe x1 slots are useful for various lower-power PCIe peripheral cards. PCIe x1 cards can fit into all PCIe expansion slots, including x4, x8, and x16 PCIe slots. There are various peripheral cards you can use with PCIe x1 expansion slots.

However, PCIe x1 cards can be installed into all PCIe expansion slots, including x4, x8, and x16 PCIe slots. Often people underestimate their role in PCIe x1 slots.