I'm not sure what ASRock has done with this motherboard, but all I can tell you is … they've done a very good job with the X570 Steel Legend. As you know, I run all my tests in AUTO mode, and this usually means default BIOS settings for both CPU speed and memory timings.
Supports all AMD Ryzen 3rd and 2nd Gen processors; AMD X570 chipset; AMD Crossfire support; Support memory speeds of up to DDR4-4666+ OC; Very good performance; Support PCIE 4.0; Polychrome RGB; 2 x Hyper M.2 slots for SSD covered by a full coverage heatsink with active fan
No mention of Nvidia SLI support