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

pcie m2 slot   Dan pcie slot x16

Sonnet's 4x4 PCIe Card is ideal for use in one of our Thunderbolt expansion systems that accept full-length PCIe cards The combo enables you to add up to

2 PCIe SSDs are generally faster than SATA SSDs, as they use the PCIe interface that offers higher bandwidth and faster data transfer rates 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

fortune monkey slot 4TG2-P SSD is designed as PCIe Gen 4x4 interface with capacity up to 4TB It features AES encryption and TCG Opal for enhance data security  Here you can find detailed performance tests of the new PCIe NVMe SSDs of the 4th generation as well as of the slower PCIe x4 SSDs