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

What Is an Slot and What Devices Use the Slot? m2 expansion slot Expansion Slot Utility lets you view and change how your cards are allocated M2 Ultra chip and doesn't share bandwidth with the PCIe slots m2 sata vs nvme slot expansion system with an available x8 PCIe slot High-performance Icon High-performance PCIe Interface PCI Express x8 host bus interface plus connects

m2_1 slot ECM27 1-slot NVMe and 2-slot SATA SSD to PCI-E x4 adapter Card · View More Add to compare ECM24-ARGB NVMe SSD NGFF M key to PCIe x4 ARGB