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

slot supports PCIe NVMe or M Key with NVMe This SSD is not compatible with Mac Product information Read Speed, ‎3500 Megabytes Per Second Write Speed

2 NVMe SSD's which slot to put OS on and does it matter? 2 socket as opposed to traditional SATA based drives that rely on using cables to connect to the motherboard and power the drive SSDs are a huge leap in

slot supports PCIe NVMe or M Key with NVMe This SSD is not compatible with Mac Product information Read Speed, ‎3500 Megabytes Per Second Write Speed

m2 pcie 40 in 30 slot The Samsung 970 EVO Plus has some of the fastest sequential read and write speeds of any PCIe SSD out there, making it an obvious

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

m2 slot 2 drives are “keyed” at one end so as to prevent the end-user from inserting them in an incompatible socket PCIe NVMe drives are 'M' keyed SATA ones,

I should add that I accidentally added it in the 4th slot because I didn't want to remove my GPU but that shouldn't affect it any as the only