Official comment
We don't necessarily recommend running the turbo boost, especially if you encounter other performance issues such as pops or clicking in the audio.
An i5 @ 2.3GHz is below the minimum of 2.5GHz; that's not to say it won't run, but it's the minimum. The recommended processor is an i7 @ 2.2GHz. With the additional cores, there's more pipelines to do the work, so a clock speed lower than the i5's is acceptable.