B550 board functions properly with 1xxx CPU models, however it does not support 3xxx or 5xxx variants.
B550 board functions properly with 1xxx CPU models, however it does not support 3xxx or 5xxx variants.
Hey there, I purchased an used MSI B550 gaming plus motherboard from someone. When I first got it and tried to boot up, the CPU debug led was always active. Other components: R5 5600 with two 8GB RAM sticks at 3600Mhz, Kingston RAM (listed in QVL), Seasonic PSU. I tested everything—RAM in all slots, different BIOS versions, even a power cycle after flashing. Everything worked except for the CPU debug light. The new R5 3600 board supports the release BIOS and performed fine. It worked on another board I owned, but he won’t pay for shipping or the debugging fees. He showed me a video, but only with a Ryzen 1200 and one stick of RAM in a very dark room. He seems to be hiding something. There was cosmetic damage, so maybe there’s more hidden issues. I’m puzzled—how can a CPU not officially supported (1200) work with this board? And do Ryzen 3 series chips use more pins than the older 1xxx models? I checked the AM4 pinout and found a few reserved pins.
Are you certain the BIOS you used works with the 3/5k series and that the flashing was successful?
The flashback completed successfully without issues. All BIOS versions work with the 3xxx series on this board, though 1xxx CPUs aren't officially supported. The 7C56v10 is the earliest BIOS available for it.
Weird... I noticed some reports suggesting B550 boards could support 1000 series. But after flashing the BIOS, did you check the BIOS settings for the version number? It's possible a failed flash might reset it back to the original. Still, that could work for 3000 series too. Honestly, most of your money might be back—don’t waste energy over it. Just keep it as a quirky story about a technical oddity you faced
Couldn't reach the BIOS due to a CPU issue. Honestly, I’ve already given up on the money. I’m just wondering how I ended up being scammed.