I was surprised to see the 1,4GHz Haswell do about as well as the 2,5GHz Ivy in the geekbench scores. I haven't been updating myself in the world of CPUs for a long time, but I suspect this has mostly to do with the 1,4GHz being able to turbo boost to 2,7GHz? But how does that translate to real world usage? If a 1,4GHz CPU can perform as well as a 2,7GHz CPU then why isn't it marketed as a 2,7GHz CPU? What is the downside to turbo boosting compared to a higher base frequency?