The AMD X470 chipset
Concurrently with the launch of the Ryzen 2 CPUs, AMD also launched its X470 chipset, the successor to X370 and the new high-end chipset for the socket AM4 platform. This new chipset, which was designed by ASMedia, is almost identical to the previous X370 chipset in terms of features and connections.
The same connections and some new features
With the AM4 platform, there is an interplay between the CPU, which already contains various controllers and is therefore actually a SoC, and the chipset, which offers additional functionality on top of that. For example, a Ryzen CPU offers four USB 3.0 ports as standard and four PCI-e 3.0 lanes for an M.2-ssd. The X470 chip set adds up to two more USB 3.1 ports, six USB 3.0 ports, as many USB 2.0 ports and up to six SATA 600 connectors. That is identical to what X370 offered.
There are some new features that can only be used in combination with the X470 chip set. The first is Precision Boost Overdrive, an even more aggressive boost method that can further increase clock speeds (as long as the temperatures allow it). In practice, the added value of this is very limited. Another new option is StoreMI, a SSD-caching software package licensed by AMD.