Vortez posted a review on the ASRock Z390 Extreme4 P
A quote from the article:
So, in the spotlight today we have the ASRock Z390 Extreme4. As we come to expect from the Extreme4, this is a mid-range motherboards carrying a good blend of features and performance. Some of these features include, dual M.2 slots, USB 3.0 and 3.1 headers and NVIDIA NVLink, SLI/AMD Crossfire support.ASRock Z390 Extreme4 Preview