https://techcrunch.com/2017/11/16/hands-on-with-microsofts-high-end-surface-book-2/

Microsoft’s Surface Book 2 is the most powerful mobile Surface device yet. It easily blows away the Surface Pro, Surface Laptop and, of course, the old Surface Book. It’s also one of the odder devices in the lineup, though. It’s not just a Surface Pro with a rigid keyboard. It’s a relatively heavy base with a powerful processor and graphics card and a big battery — and it has a surprisingly light removable screen that turns it into a tablet and that features a less powerful processor and graphics chip.

Microsoft shipped me top-of-the-line 15-inch Surface Book 2 review unit with the latest Intel Core i7-8650U CPU clocked at 1.9 GHz, a discrete Nvidia 1060 GPU with 6GB of RAM, 16GB of memory and a terabyte SSD. That’s $3,299 worth of Surface Book, though at the low-end, you can also get a 13-inch machine for $1,499 with an i5 processor, 8GB of RAM and an integrated Intel GPU. In between, there are a number of other 15-inch models with Nvidia 1050 GPUs and varying numbers for RAM and disk space.