In any case, these chips are fine for doing basic tasks one at a time and are typically paired with 4GB of Ram. Intel has rebranded its Core i3 (and i5 and i7) line-up, ditching the iconic 'i' it's ...
Options are for Core i5-7200U (2.5GHz), Core i5-7300U (2.6GHz) or, at the top end, the Core i7-7600U (2.9GHz). The Surface Book i7, as suggested by the name, features the Intel Core i7 processor.