Slot Types

PCIe slots use NVMe, which is a communication protocol that leverages the increased bandwidth to support faster NVMe SSDs, which isn't present in SATA M

Motherboard that has Slot with M key not always support SATA I received a new NVMe m slot SSD HD but when I opened my laptop

m2 slot mainboard PCIe and particularly PCIe slots add complexity to motherboards making them more expensive They take up a lot of PCB space

m2 pcie 40 in 30 slot 2 slot closest to the CPU will most often be the one that has the highest bandwidth, but always check your motherboard manual to make sure How to Install