I'm not sure why it would be boosting to 3.8 GHz if you've overclocking to 3.6 GHz; the stock turbo boost goes to 3.46 GHz.
But there's no difference between running 3.8 GHz all the time or with turbo boost.
Ok, i thought turbo boost wasnt so optimal at 3.8 Ghz as without turbo boost at 3.8 Ghz. Are you sure that turbo boost shouldnt go above 3.46 Ghz? I thought that turbo boost just auto calculated the maximum frequency the pc can handle at certain volts, as if i overclocked to 4 Ghz with enough volts to even go to 4.4 Ghz, turbo boost would recognize that and overclock to 4.4 Ghz, thats what i been told by a friend :P