A:Answer In short, the i5 processor (i5-1035G4) that is integrated to the Surface Pro 7 is a quad core 3.7GHz part at peak performance.
The processor on the Surface Pro 7 is variable between sub-model, coming with an Intel i3, i5 or i7 processor. Each processor also contains a family of sub-model processors. Take a look at the link below to start to familiarize yourself with what this means and plan your purchase for your needs. In general, an i5 of this quality will handle anything the rest of the Surface Pro 7 hardware can throw at it. If you plan to use this for graphics computing or high end gaming you may want to look at higher end models, but anything else, it will handle with ease.
https://laptopmedia.com/comparisons/intel-core-i5-1035g4-vs-i7-8650u-the-new-i5-1035g4-rocks/