You cannot 'unlock' Turbo --- it is fixed in relation to the CPU multiplier and individual cores.
And, there is nothing wrong with OC'ing with Turbo engaged ... or with using Cool & Quiet while over-clocking. Turbo will limit the 'headroom' of clocking across all cores because the boost to a single (or, several) cores 'pops' the VCore too high.
Stilt over at XS had a utility to individually adjust the Turbo VCores ... not sure what happened to it (it dropped off the radar)