Ok first of all what Intel® Turbo Boost does is that detects the temperature, if it is plugged in (on a laptop) and the number of cores in use. Based on this information it can clock the speed up. So if you are using only a single core and the temperatures are good you will get the best speed. For each additional core in use it may drop down 100MHz. So unless you are over heating you should still get a performance boost from Intel Turbo boost.