https://wccftech.com/ipad-pro-a12x-chipset-vortex-gpu/

If you thought the A12 Bionic running in latest 2018 iPhone series was fast, Apple is preparing something for its upcoming iPad Pro lineup that is expected to eclipse the 7nm FinFET SoC in terms of performance. The tech giant is expected to stick with the usual sequential model naming of the silicon, meaning that the 2018 iPad Pro will be fueled by the A12X chipset, along with a Vortex GPU. We are assuming that Apple will be sticking to the same TSMC architecture in order to provide the same level of efficiency from these latest slates, not to mention that they will come with an improved design.

A previous rumor reported by us detailed the number of cores belonging to the A12X, landing at a total of eight. However, how many will belong to the performance and efficiency department, that we have no information on right now. Additionally, the latest information just details that the A12X chipset will be faster than the A12 Bionic, but does not state how fast would it exactly be.