2 NVMe SSD's which slot to put OS on and does it matter?

2 connector, labeled as PCIe > Insert drive into the slot > Secure the SSD with the mounting screw Install on Desktop computer

2 SSD Keying Currently an SSD has either one of three key types: B, M or B+M, while a socket can only have

m2 slot 2 drive can still be connected using an adapter card that fits a PCIe slot SATA SSDs SATA drives are becoming an increasingly popular form

m2 pcie 40 in 30 slot 22 mm × 110 mm A size comparison of an mSATA SSD and an 2242 SSD B+M , 12-19 and 59–66, SATA, PCIe ×2, and SMBus Maximum