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

SSD Card 1x PCIe 2x SATA pcie m2 slot 2 slots, which will be PCIe X4 Gen 34 pcie slot width 2 SSD slot, and support for a PCIe NVMe slot is listed as an optional feature for AMD's B650 chipset motherboards Most B650E, X670 and

pcie x1 slot function 2 is a form factor that can take the form of a SATA SSD or a PCIe NVMe SSD Image of Micron M600 SSD drives Micron Technology M600 SSD form factors (left to