AB350-Pro4 BIOS Update order

AsRock doesn't always keep the "CPU Support List" up-to-date.
You can see that their list contains ZERO Renoir, Vermeer nor Cezanne CPUs, but the BIOS update page says, "Support Renoir, Vermeer, and Cezanne CPU."

You have a 1400 (Summit Ridge / original Zen), so I think it'll work just fine.
Go to 7.00 first, and then go to either 7.40 (latest non-beta) or L8.02 (latest beta).

If I were you, I'd do:
1) Flash to 7.00 (bridge BIOS)
2) Flash to 7.40 (latest non-beta)
3) Swap CPU, clear CMOS.
4) Flash to L8.02 (latest beta)
5) Be happy. And update again when AsRock releases another update (AGESA 1.2.0.A or maybe even newer).

The reason for doing yet another flashing after swapping the CPU to 5600 is because, as I understand it, there is some addressing limitation with older CPUs, so I'm not sure if 1400 would be able to write the entire BIOS space.

Also note, R5-5600 (Vermeer) is entirely different beast from R5-5600G (Cezanne). I've heard of more issues going from pre-Matisse to Cezanne. I've not heard of any issues going to Matisse or Vermeer. Something about the way APU uses the BIOS addressing space. That's why some of the BIOS pages say you have to use Matisse or newer to flash in order to support Renoir/Cezanne.

[QUOTE=threadzipper1957] My advice, don't use the 5000 series CPU's, but stick to the CPU support list.
[URL=https://www.asrock.[/QUOTE]

Here is the reply I got from ASRock. Any comments???

Question: This motherboard is being used as a home surveillance camera build. Can it handle an upgrade to a Ryzen 5 5600G processor and a Bios upgrade to handle the Ryzen 5 5600G. What Bios version can it be upgraded to?

ASRock: Yes, the board support the type of processor 5600G , but you can not update your motherboard BIOs if you have installed A12 CPU , will not allowed you to do it.

To update your BIOS you need a newer CPU model like 3400G or 3600X

To update from the BIOs 5.00 you have , you need to do two steps .

Update your BIOS to 5.40 first and then you can update to L8.02



Bios download link

https://www.asrock.com/mb/AMD/AB350%20Pro4/index.asp#BIOS



How to update

https://www.asrock.com/support/BIOSIG.asp?cat=BIOS10

Comment: I suppose a 5600X will operate just as well as a 5600G. I also have a straight Ryzen 5 3600

Any comments overall?????

Thanks, Dekade

Hi

I have gone same upgrade path on AB350-Pro4.

Flashed BIOS to latest 8.2. Left my 1500X in and it was fine. Then a week later dropped in 5600g.

So far (3 weeks in) no issues.

Going to update Ram from 2x4gb to 2x8gb...and trying to get my head around just what type of Ram this Motherboard/CPU combo will support. Various reports of 2666 to 3200. But Cezanne processor is pretty new territory for this board.

My advice, don't use the 5000 series CPU's, but stick to the CPU support list.
https://www.asrock.com/mb/AMD/AB350%20Pro4/index.asp#CPU
5000 sereis is not on the support list and can only function because AMD put that in the Agesa code, and sometimes it works for a short while, and suddenly 1 memory slot stops working, with the Old CPU there is no problem, and when you put the new CPU on an newer board, there is also no problem
Also a new BIOS doesn't mean, that it is always betetr, that is a misperception, many people have.
When your BIOS is 5.40, indeed you need to go to the 7.00 bridge BIOS, then You can update to 8.02.
But You cannot downgrade anymore, once You have 7.00 or above.