A:AnswerGood question. Those 2 models are the same computer. M9Z92AA#ABA is actually the HP product # and the model is Envy 750-114.
For a detailed spec sheet on this computer, please visit the following link: http://store.hp.com/wcsstore/hpusstore/pdf/m9z92aa.pdf
I hope this helps!
A:AnswerGood question. There was probably an error in the specs. The processor has a base frequency of 2.7 GHz. It can be a maximum of 3.3 GHz with Intel's TurboBoost feature.
For more details about this PC, please visit the following link: https://store.hp.com/wcsstore/hpusstore/pdf/m9z92aa.pdf
I hope this helps.