NVMe is a transfer protocol standard that is used to connect devices directly to the PCIe bus.
NVMe can be used to connect SSDs, due to the fact the transfer speeds of PCIe bus is significantly faster then the SATA bus
NVMe SSDs outperform SATA SSDs several times over.An SSD is either a SATA SSD or an NVMe SSD. An SSD can't support both standards.
Even at a glance, the differences between NVMe and SATA in performance are impressive.
The communication drivers and interface between NVMe and SATA are completely different.
SATA uses AHCI drivers that are designed for hard disk drives (HDD) with spinning technology while the NVMe driver is specifically designed for SSDs with flash technology.
In addition, NVMe is able to take advantage of the PCIe sockets to communicate between the storage interface and system’s CPU for even greater leverage.