Ryzen 9 5900 OEM not working on Taichi B550

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   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

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alexbo Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 23 Aug 2023 Location: Spain Status: Offline Points: 20	Post Options Post Reply Quote alexbo Report Post Thanks(0) Quote Reply Topic: Ryzen 9 5900 OEM not working on Taichi B550 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