Q. You have said it will support 4650G after a BIOS update.. Are you sure? Asking coz the Asrock website does not have it in the list of compatible CPUs. They have updated it with the 5000 series but the 4650G is still not included.
http://www.asrock.com/MB/AMD/B450M%20Pro4/index.asp#CPU 25/12/2020

A. BIOS version hasn't released yet.

karan shah (Verified Buyer )

Q. does it support AMD 4650G? will it be needed to update BIOS ? 21/12/2020

A. Yes.

Suparno Lahiri (Verified Buyer )

Q. Does this support new Ryzen 5000 series processors? Specifically the Ryzen 5 5600x processor? 10/11/2020

A. No update regarding the BIOS version for the chipset.

Sanjo (Verified Buyer )

Q. Does this has updated BIOS or you guys will do that? 21/10/2020

A. We will do the BIOS update. 

Prakhar Singh (Verified Buyer )

Q. Do we need a BIOS update to use the ryzen 3 3300x? If so, will you update the BIOS if requested? 19/10/2020

A. Yes Sir, BIOS update is required and we can do that for free. 

Kannan K (Verified Buyer )