Don’t buy solid state drives blindly.
Recently, many friends have asked me how to buy a solid-state drive. Let me tell you a few more words for reference.
Currently, M.2 interface solid-state drives on the market are mainly divided into two protocols, namely SATA protocol and NVME protocol. If your solid-state drive can only read at a maximum speed of around 500 megabits per second, then you must have bought an M.2 solid-state drive with the SATA protocol, and the speed is only that little.
Generally speaking, the current price gap between the two protocols of solid-state drives is not too big, but the actual experience is indeed very different. After all, the maximum transmission rate of the SATA3.0 specification is only about 750 megabits per second, and the peak speed in actual use is usually only 550 megabits per second. If the reading speed is below, then you must have bought the SATA protocol
The proposed M.2 solid-state drive is only so fast. The NVME protocol uses the PCIE bus, a single
The PCIE3.0 channel speed reaches about 950 megabits per second. The solid state of the NVME protocol usually uses four channels, which means a speed of about 3800 megabytes per second.
It's about seven or eight times the difference between the SATA interface and the SATA interface.