Do I need to update the BIOS?



Amazon has replied and a BIOS update is required.
 


This seems like a lot of hassle just for this. I will be receiving the Motherboard on Christmas and I have never built a system before. Any suggestions on what to do?
 


Will the Asus Prime X470-PRO Motherboard support a 2600X? Will I need to flash the BIOS on this mobo?
 
So if I were to buy the MSI mobo that I originally linked and a Ryzen 7 1700x, no BIOS update would be required and I could just download new BIOS updates from the same system? Also is there a performance difference between the 2600X and the 1700X?