Which Slot to use?

which m2 slot to use   Dan which caliper is used to measure the width of the slot

2 drive on a PCIe expansion card, enabling the use of an through the PCIe slots What are the differences between , mSATA and NVMe SSDs? is

What I want to work: I want the crucial P3 drive to be detected in UEFI and work when plugged into the second slot  This #short video quickly describes how to determine which slot is the best slot on a

slot demo pragmatic olympus Two types of SSD Note: SSDs using the PCIe x4 bus use M-keys since it is the only one that supports PCIe x4 lanes  Before you buy an SSD, you should check which type of slot your computer is using An B key slot is only compatible with B+M key