Hi, I am an unsatisfied owner of Surface Book as a gamer.
I know this laptop isn't for high end games, but those MOBA I played are fine with the Nvidia GPU in Surface Book.
The real problem I encountered is, the Nvidia GPU does not active at the start up, if I load the game after I turned on Surface Book the first time, I got super low FPS.
No matter how many times I re-open the game, it stayed the same, until I restart my computer.
This occasionally NOT happens, but 8 of 10 times I got this problem.
I have assigned the game using Nvidia GPU in the setting, and I have look around on internet and yet found a solution.
This is definitely a software problem, MS please fix it ASAP by update, thank you.