NVMe vs : What's the difference?

Acer ; Acer Aspire 7 , 1x PCIe NVMe slot ; Acer Aspire A615-51, 1x 2280 PCIe NVMe slot ; Acer Aspire E , 1x 2280 SATA III

1 x 67 pin key M slot 1 x 67 pin key B slot 2 SSD PCIe NVMe Key M 2280

m2 expansion slot In this video, I tested the PCIe gen 3 slots to see if there is any performance difference when

m2 slot types 2 SSD The P300 is Patriot's next generation of mid-tier PCIe Gen3 x4 NVMe SSD to hit the market, offering 25% higher transfer speeds and IOPs