BIOS version at least 4204 is needed for best RAM compatibility because of AGESA 1006 and
4207 is best for that MB and it's proper operation but not necessary just to install Windows 10.
Just follow MB manual. Get the BIOS file from Asus site
https://www.asus.com/Motherboards/PRIME-X470-PRO/HelpDesk_BIOS/ unzip the file " PRIME-X470-PRO-ASUS-4207.zip" and it's content which is file " PRIME-X470-PRO-ASUS-4207.CAP" to an USB stick formatted to Fat32.
Reset CMOS (with all power off) and once you BOOT to BIOS you choose it from the advanced menu (F7) > Tools > Asus Ez Flash utility > Via storage device(s) and let it install as prescribed.
I tested them all and found that 4207 is best for stability.