2 SSD buy recommendations, and m. m. 2 SSD and SATA SSD common problems

When users buy m. 2 SSD, must consider the interface type, agreement, price and other factors.

Whether they should first check the motherboard support m. 2 SSD, socket is appropriate for module size, and then check whether computer support NVMe mode. After, the user can consider price and capacity factors.

In general, under the same capacity, using the NVMe protocol of m. 2 SSD is almost use AHCI protocol and SATA bus m. 2 twice the SSD. If possible, still worth buying NVMe agreement with m. 2.

M. 2 SSD and SATA SSD common problems

M. 2 the SSD is faster than SATA SSD?
SATA SSD mainly use AHCI (advanced host controller interface) protocol. The theoretical data transfer rate of 600 MB/s.
M. 2 SSD can support AHCI or NVMe agreement. If m. 2 SSD AHCI agreement, the read and write performance is the same as the SATA SSD. If it USES the NVMe protocol (PCI - E), it will be far more quickly than the SATA SSD.

M. 2 is faster than the SSD?
If m. SSD interface is 2 B - the key (Socket (2) and support NVMe protocol, it at least 3 times faster than SATA SSD. If m. SSD interface is 2 M - the key (3) Socket and support NVMe protocol, it almost seven times faster than SATA SSD.

All m. 2 SSDS are all the same?
Of course not, m. 2 SSD owing to the different interface.