Who is stronger, the CPU's SATA controller or the Southbridge's SATA controller?

Generally speaking, the processor built-in performance is stronger, but in the RYZEN platform, according to the media review chipset provided by the SATA interface 4K small file read and write performance is stronger (on the performance of the impact of the large sequential read and write large files is the processor comes with the interface is stronger.

Nowadays, many processors are integrated with the traditional Northbridge function, such as ryzen processor with SATA controller, theoretically directly connected to the processor within the SATA controller read/write efficiency should be higher than the chipset integration of the SATA interface (ryzen appeared to the chipset SATA performance is higher, I personally think that it may be the acquisition of AMD's original ATI chipset disk controller performance) Weaker, and the chipset is a third-party company ASUS subsidiary Xiangshuo provide, but 4K performance is stronger), most of the market ryzen platform motherboard to use the traditional chipset (Southbridge) to provide the SATA interface is the main; in the use of the full-speed M.2 interface, the processor comes with a SATA interface will be shielded, in fact, for the SATA device, the performance gap is actually not a big impact, the owners of the The SATA interface is a powerful and efficient way to connect your PC to your computer.

The results of the SuperSpeed test using the GIGABYTE AB350-Gaming 3 motherboard:

CPU provides SATA interface:

Chipset provides SATA interface: