Is it possible to set diff cores at diff clock speeds?

[Noel 4,501]

MSI MPG Gaming Edge mobo w/ an AMI BIOS.  I'm experimenting w/ the idea of running P3D's main thread at 5gHz, and the texture loader logical processors in an HT enabled 9900K at around 4200mHz or so, and this practice to reduce total heat is all.  I can choose the Per Core option in O/C Expert settings, enter clock speeds per core, but when I get to the desktop they're all running at the lower clock speed of 4200mHz.  There must be a trick to getting the Per Core option to work because it is an option after all, but don't know what that is.  SpeedStep is enabled as is TurboBoost, though I don't know if the latter matters since I set the clockspeed manually.

Thanks in advance

[Bob Scott 7,721]

The "Per core" BIOS option is widely misunderstood to mean that individual cores can be clocked separately. 

It means that the single clock signal that is applied to all the cores can be controlled dynamically based on the number of cores under load...e.g. "speed controlled per core load" with "per" meaning 'according to' or 'as a function of', e.g. "pilots must operate the engine per flight manual limits."

Some of the intel extreme-series (e.g. "X-suffix") processors and supporting chipsets do have the ability to clock cores separately, but not the mainstream CPUs like the 9900K.

[Noel 4,501]

Yes indeed--thanks

[TechguyMaxC 516]

Some platforms allow per-core clock speeds to be set, X299 does, and it looks like Z490 will as well.