Onboard m2 slot or pcie m2 expantion card? which is faster?

PCIe Expansion card and Bifurcation m2 expansion slot An slot is a type of expansion slot found on modern motherboards that is primarily used for connecting solid-state drives m2 vs nvme slot In this article we will take a look at the different types of industrial motherboard expansion slots including PCIe, and Mini PCIe

m2 pcie 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