ASUS PRIME X370 PRO Review @ Vortez
 

The PRIME X370 PRO comes in as amongst the cheapest X370 motherboards available and misses out some of the perks of the platform, such as SATA express, or an NVMe port, which aren't yet commonly used standards, but it does feature an M.2 socket and a front panel USB 3.1 Gen 2 header, technology that is undoubtedly becoming much more mainstream.

https://www.vortez.net/review.php?id=1283