What is an slot on a motherboard used for?

What is an slot on a motherboard used for? m 2 slot key m The M-key just means that the controller supports fast SSD A modern M-key PCIe has a good chance of supporting NVMe, while if it was made m2 nvme slot 2 drive, known as SSD, is a small-sized disk that directly connects to the motherboard in a computer has around 2500MBs for data

m2 nvme slot M Key Common Usage: PCIex4 and NVMe SSD M Key Interfaces Support: PCIe x4, SATA, and SMBus B+

m2 slot types There are some mechanical keys defined for SSDs For example key B pinout supports SSDWWAN: 1x SATA SSD or 1x, 2x PCIe SSD Host Currently the keys B, M, A and E together with B+M and A+E are in use The slot and the module have to support the same key in order to be compatible