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

The is a family of form factors that enables expansion, contraction, and higher integration of functions onto a single form factor module solution One

M Key: uses a gap in the left side of the card , with five pins to the left of the gap This configuration

m2 pcie 40 in 30 slot Install into a PCIe x 4 expansion slot to add a removable and lockable NVMe drive tray Your price €

m2 nvme slot External connector 4 x slot Supports up to PCIe x16 bandwidth Supports 2242 2260 2280 22110 storage devices