How to determine which slot a SSD is connected to

Windows 11 doesn't recognize an NVMe in a pcie slot after m2 expansion slot 2 slot that can run at NVMe PCIe bandwidth, whereas others may be restricted to using SATA bandwidth Some motherboards' slots may even m2 pcie 40 in 30 slot My SSD connected to my board but speedtest gives me 3Gbs If I buy pcie expansion card can it be faster than onboard slot? Onboard m2 slot or

m2 slot pc 2 expansion card to add an additional Slot to your PC ATX motherboards have ample slots but if you have a small form factor mATX motherboard (usually