Second slot M.2 Nvm disables First Slot M.2 Nvme

nvm slotThe ‘Key M’ or ‘M key’ slot is specifically for PCI-E SSDs aka NVME SSDs which are currently the fastest SSD type that one can buy. The ‘Key B’ slot is for M.2 SATA SSDs.When you buy a new SSD, it uses either the SATA or NVMe interface to connect to your computer. Traditional SATA SSDs use the 2.5 form factor, as seen in the picture below.