pcie ssd slot on motherboard: Motherboards Explained: The AAFP - Overclockers UK. Can I Use a PCIe 3.0 Card in a 2.0 Slot? - PC Guide 101. Can You Use a PCIe 4.0 SSD On Your Existing Motherboard?.
To use a PCIe SSD, the motherboard must have available
PCIe slots and, for M.2 PCIe SSDs, an
M.2 slot that supports PCIe.
A PCIe 4.0 NVMe SSD will work in a PCIe 3.0 M.2 motherboard
slot at PCIe 3.0 speeds.
Can I Put a 4.0 NVMe in a 3.0 Slot? ... You can install a faster NVMe M.2 2230 SSD supporting the PCIe 4.0 standard into an older motherboard slot that only supports the PCIe 3.0 specification.