AMD Motherboards - Ryzen 9 5900 OEM not working on Taichi B550

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Ryzen 9 5900 OEM not working on Taichi B550

Printed From: ASRock.com
Category: Technical Support
Forum Name: AMD Motherboards
Forum Description: Question about ASRock AMD motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=26360
Printed Date: 27 Jul 2024 at 10:27pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: Ryzen 9 5900 OEM not working on Taichi B550

Posted By: alexbo
Subject: Ryzen 9 5900 OEM not working on Taichi B550
Date Posted: 23 Aug 2023 at 11:21pm

Hi,
I bought a Ryzen 9 5900 (without the X, as its the OEM version), but when updating my current ryzen 5 3600, the new CPU gets only detected by BIOS on version 2.0 but will not continue to load windows.
I cant even get any windows or linux bootable usb to work either. It stays in constant "loading mode" nothing happens.
Yes, I have tried rufus with MBR and GPT as well as all possible combinations of CSM enabled, even secure boot disabled, cleared CMOS... Everything!

If I update to newer versions, it simply doesnt boot at all.
In the LCD display I get codes: 27 or 28. And nothing else happens.

Does somebody know if there is a specific BIOS I should use for this Ryzen 9 cpu?

I would really appreciate if someone could help me here.

Thanks a lot