What is the difference between solid-state disk m2 interface and sata interface

M.2 interface and SATA interface of solid state disk (SSD) are two common connection interfaces. They have the following differences:

1. Physical size: The M.2 interface is relatively smaller and thinner, suitable for compact devices, such as ultra-thin laptops, tablets, etc. The SATA interface is usually large and suitable for traditional desktop computers and laptops.
2. Transmission speed: M.2 interface supports higher transmission speed. According to different protocols and specifications, M. The 2 interface can use PCIe (PCI Express) or SATA protocol for data transmission. The M.2 interface of PCIe protocol is faster and can achieve higher data transmission rate, thus providing better performance. The transmission speed of SATA interface is relatively low.
3. Extensibility: M.2 interface has better scalability. Since the M.2 interface supports the PCIe protocol, higher bandwidth and more device expansion can be achieved by connecting to multiple channels on the PCIe bus. This enables the M.2 interface to support more functions, such as NVMe (Non Volatile Memory Express) protocol, providing higher performance and lower latency.
4. Compatibility: SATA interface has wide compatibility. Since SATA interface is one of the common interfaces for traditional hard disks and SSDs, almost all motherboards and devices support SATA interface. However, the M.2 interface is relatively new. Some old devices or motherboards may not have an M.2 slot, which requires an additional adapter or adapter cable to use.

in summary, M. 2 interface has smaller physical size, higher transmission speed and better scalability than SATA interface, but may be relatively poor in compatibility. Which interface to choose depends on the device type, performance requirements, compatibility requirements and other factors.