AMD 5600x PRD at 80% stock and undervolt

[Ijustwanttofixthis]

My 5600x is at 80% PRD under load at stock and with -30 undervolt. Tested with cinebench 23. Any idea what could be causing this?
Screenshot 1 stock
Screenshot 2 -30 undervolt

 

[Martin]

IMPORTANT - Explaining the AMD Ryzen "Power Reporting Deviation" -metric in HWiNFO

Ryzen CPUs for AM4 platform rely on external, motherboard sourced telemetry to determine their power consumption. The voltage, current and power telemetry is provided to the processor by the motherboard VRM controller through the AMD SVI2 interface. This information is consumed by the processors...

www.hwinfo.com