Asrock B550M Pro4 - anyone tested this?

[Andi B.]

This board looks pretty good to me regarding all the interfaces I like. Anyone tested this in CSM/legacy mode with a Ryzen 7 with integrated graphic (5700G I wanna have)?
- Memory available to OS/2 > 3GB?
- Ryzen 7 graphic with Panorama and 3840x2160 working?
- M2 slots working for boot device?

I know there is a thread about the B450M Pro4 but B550M Pro4 I would like.

[Eugene Tucker]

In CSM yes I have had one. It works pretty well, Other have had success with the MSI board but not me. I have an Asus 570 working in CSM. And sound works with the last drop of Uniaud by Paul Smedly.

[Andi B.]

Answer some of my questions by myself -

This board looks pretty good to me regarding all the interfaces I like. Anyone tested this in CSM/legacy mode with a Ryzen 7 with integrated graphic (5700G I wanna have)?
- Memory available to OS/2 > 3GB?

Only about 2.6 - 2.9GB

- Ryzen 7 graphic with Panorama and 3840x2160 working?

No currently not. Only 2560x1440 or something like that.

- M2 slots working for boot device?

Yes, at least the first one. Waiting for a second NVMe to test. Both with CSM booting or UEFI works but WinOS2 only in UEFI mode. Maybe the switches in config.sys will allow WinOS2 in CSM mode too, but didn't test until now.