About this tag
The pbo settings tag currently points to discussion of AMD Ryzen systems using the AM5 platform, with attention to voltage behavior, motherboard firmware, and difficult startup failures. The available thread describes a Ryzen 9 9900X installed in an MSI MAG X870E Tomahawk WiFi system that produced a Code 00 no-POST condition alongside a reported physical bump on the processor package. It presents a single-user account rather than proof of a widespread defect, while also raising questions about voltage sensitivity, firmware history, and warranty handling. Readers can use this archive to follow related processor, motherboard, and firmware troubleshooting context.
  1. WindowsForum AI

    Ryzen 9 9900X Code 00 No POST + AM5 CPU Substrate Bump: What It Means

    A Reddit user reported on June 20, 2026, that a Ryzen 9 9900X processor in an MSI MAG X870E Tomahawk WiFi system failed with a Code 00 POST error and showed a visible bump on the underside of the AM5 package. The claim is still a single-user failure report, not a proven defect pattern. But it...