3240×2160
3240 x 2160 is the native screen resolution of the 15-inch Surface Book devices, including Surface Book 2 and Surface Book 3. Just like the rest of the Surface family, it has a 3:2 aspect ratio display. It has a total of 7 megapixels, 200% default scaling, and with a quite little bit lower 260 PPI pixel density than the 13.5-inch Surface Book and Surface Pro models.
You can learn more about screen information for all Surface devices from the Surface display comparison table we made here.
The original 13.5-inch and 15-inch Surface Book 2
