NVME M2 drives: which slot to use?

How to Install an NVMe SSD Hard Drive and Why You Should what does an nvme slot look like 2 is a slot that can interface with SATA , PCI Express what is the best slot app slot it has, It looks like it is an NVMe slot but most of the SSDs I have seen online have 5 pins and this slot seems to have 4, please

what denomination slot machine pays best drives are as utilitarian as upgrades come: They look like sticks of gum studded with NAND modules and a controller chip (NAND is the generic term