2 Types of SSDs: SATA and NVMe

How to install an SSD in a PC: A beginners guide nvme m 2 ssd slot cards with a B Key interface can only fit into a B Key host slot, and likewise for M Key But cards with a B+M Key design can fit in either nvme and m2 slot difference is a form factor, there are a few variants for different applications, but the variant we are interested in for NVME SSDs is M key This

nvme slot vs m2 2 slots were common, it's not like SATA was super common and then NVMe came later, they came together and always coexisted some cheaper