PPT measurement for Radeon 780M seems to be wrong both under Linux and Windows

sensors output for 7840HS/780M looks to be completely off/wrong, case in point:

$ sensors amdgpu-pci-c300 | grep PPT
PPT:           7.17 W

However

turbostat --quiet --num_iterations 1 --interval 1 --show PkgWatt --Summary

reports values from 0.3W to 1.5W at most after enabling ryzenadj --power-saving. Even without using ryzenadj PkgWatt hovers around 3.5W but PPT for the 780M remains at the very least twice as much, often a lot more.

Under Windows 10/11 the discrepancy exists as well. HWiNFO64 sometimes reports values lower for the whole package than it reports for the integrated GPU. Specifically I'm talking about CPU Package Power and GPU Core Power (VDDCR_GFX) inputs.

Of course, I could be completely wrong about the meaning of PPT.