I am experience problem when PC is waking up from sleep. I have Intel i5 2400 CPU with 31x multiplier and default turbo boost ratios 34x,33x,33x,32x. After normal cold boot I see turbo boost working ok, CPU rising up to 34x on load (though it seems a bit inconsistent, it s up to 34x even on all 4 cores load). I can set general CPU multiplier up to 38x, got 3600Mhz with it and if enable C3/C6 states got up to 3800Mhz.
But that all works only until first sleep/wake up. After wake from sleep I have multiplier locked on 32x regardless of use turbo boost or disable it in BIOS. That means that something is broken even on stock speeds without any overclocking.
I ended up to manually set all ratios to 32x and disable turbo boost to have my system work the same after cold boot and after wake up from sleep. Overclocking is not that important for me, I even undervolt CPU to have any “benefit” of non working feature. (By the way, I use dynamic voltage adjustment of -0.200V, that is the upper limit in BIOS and I wish it will be at least up to -0.300V as my CPU seems be able to run on even less voltage).
I have latest F3 BIOS.