Appreciate the information; it's reassuring since I currently make use of the fifth and sixth ports. Nevertheless, I've gone ahead and updated my BIOS to the latest version, 6203, with the intention of upgrading from my old Ryzen 3 1200 to the Ryzen 7 5800x. I've done some research online, and it appears that the 5800x should be compatible, but I'd like to hear your thoughts on this matter. Thanks!Yes, the 970 EVO will work just fine.
You just have to note that using the M.2 slot will disable SATA ports 5 and 6 as per page vii of the manual - https://dlcdnets.asus.com/pub/ASUS/mb/SocketAM4/PRIME_B350-PLUS/E13723_PRIME_B350-PLUS_UM_V3_WEB_20171114.pdf?model=PRIME B350-PLUS