@Arrakis
Our Threadripper CPUs have a default TDP of 280W (3960x,3970x,3990x)
I can't generalise about all kind of use but above example is about multithreading Maya rendering with Arnold Renderer)
In my MSI:
1) PBO in auto or in disabled mode produces a max TDP of about 274W and a temperature of about 72° (max frequency is about 4.3Ghz)
2) PBO in enabled mode produces a max TDP of about 415W (😂) and a temperature of about 92° (max frrequency is 4.3Ghz)
All cores work @100% of their power (3.7 Ghz in my 3970x, I think in your 3.8Ghz) (max turbo boost for all cores)
in 1) I have for my testing scene a rendering time of 2m 51s
in 2) I have in the same scene a rendering time of 2m 59s
These kind of differences I can see in all tasks where multicore is used @ its maximal values
Not tested for now in a scientific way in tasks where only a few cores are involved
For this I can affirm that using PBO is not a good choice in my rig!
I would be happy if some of you could also share their experiences in this field!