john (john.ral8.delete@this.gmail.com) on August 10, 2019 10:54 am wrote:
> AMD marketing on the specs is just misleading.
>
> Your 9900K can easily do 5 GHz on a few cores and 4.7 GHz on all cores. You can also
> most likely reliability overclock the whole chip to >= 5 GHz on all cores. Although
> the 3950X isn't out yet, the 3900X can't even get to the advertised 4.6 GHz no matter
> what setup/cooling. Most people have a hard time getting to 4.4 on a single core.



While I have also seen these rumors mentioned, I have not seen enough information to be able to determine the cause and whether these complaints are correct or not.


As mentioned in other posts here, AMD's new turbo algorithm works like Intel's turbo v. 3.0.


That means that the 4.6 GHz is usually attainable only on certain cores, not on any cores.


To be able to reach 4.6 GHz, the OS must know which is the best core and schedule the execution thread on it.


For now, this works only on very recent Windows 10 versions.


In the case of those who complain about not reaching 4.6 GHz but who do not have an up-to-date Windows 10 OS, this behavior is expected and it matches AMD's specification.