X570 Creator and 5900x WHEA ID18

Dear Taco,
Thank you for the reply.

PBO enables CPU to maintain higher voltages for longer times, it means system will need more power after enabling this feature.
The CPU 5900X and GPU 3090 belongs to the device which has large power consumption. I afraid that the System will need at least 1200W to make itself working stably when it loading under PBO mode.

For this case, you can also use a stronger PSU to verify.

Thank you,

Best wishes,
ASRock TSD

Dear Taco,
Thank you for the reply.

Generally, if the system works properly with only enable XMP profile, it means that the processor and memory are compatible.

According to your verification, if the problem can be fixed by replacing the CPU, we though the problem might relate to the CPU more.

Thank you,

Best wishes,
ASRock TSD

Dear Taco,
Thank you for the reply.

Just took X570 Creator and CPU 5900X to test, but didn't reproduce the issue.
In our lab, the system can run Prime95 smallest FFTs or play video on Youtube properly after setting the PBO to "Enable".

For this case, could you please tell us how did you reproduce the issue with your system? We will check it further.

Thank you,

Best wishes,
ASRock TSD

Thank you,

Best wishes,
ASRock TSD

Dear Taco,
Thank you for the reply.

Could you please set the memory frequency to default(no overclock) to try>
We would like to know what is the cause of your problem, PBO or memory frequency.

Thank you,

Best wishes,
ASRock TSD

Try flashing back to the 3.00 AMD AGESA Combo-AM4 V2 1.0.8.0 BIOS and see if you are automagically stable all of a sudden.