In some cases, the systems simply stopped booting but in one case the Ryzen 7800X3D became physically deformed, bulging out underneath and bending the pins on the motherboard's processor socket.

Motherboard maker MSI indicated that the damage "may have been caused by abnormal voltage issues." Ryzen 7000X3D processors already impose limits on overclocking and power settings, but new BIOS updates from MSI specifically disallow any kind of "overvolting" features that could give the CPUs more power than they were built to handle.

Ryzen 7000X3D processors are set to a lower voltage than regular Ryzen 7000 CPUs by default because the extra L3 cache layered on top of the processor die can raise temperatures and make the CPU more difficult to cool.

This has made the chips much more power-efficient than the standard Ryzen chips, but that efficiency comes at the cost of overclocking settings and other features that some enthusiasts use to squeeze more performance out of their PCs.

MSI said:  

 It's important to note that the 7000X3D series CPUs do not support manual voltage and frequency adjustments, but only support PBO (Precision Boost Overdrive) overclocking. In order to prevent over-voltage and reduce the risk of damage to the 7000X3D series CPUs, MSI has added some restrictions in both the AM5 series BIOS and the MSI Center.

The BIOS now only supports negative offset voltage settings, which can reduce the CPU voltage only. MSI Center also restricts any direct voltage and frequency adjustments, ensuring that the CPU won't be damaged due to over-voltage.

For those looking to enhance the performance of their 7000X3D CPUs, an option called Enhanced Mode Boost is offered in BIOS. This option optimizes the PBO settings, allowing the 7000X3D series CPUs to achieve better performance without any manual voltage adjustments.

BIOS with CPU voltage restrictions: