FPS rates are so far not stable in today's games. To get stable you have to go beyond what you need to play the game then CAP the rate to 60.
At 650 you can't do that but are going to be stuck with the usual i5 1050 Ti GPU gamer laptops.
That budget means you can't get to the point where you have ample power to get to stable but must go with the what can run the game and then drop game settings to get the FPS up.
Why not an XBox one in this case. It's cheaper and I see CDGO on it.
Need a laptop/notebook for university, budget around 650$. Doesn't have to run AAA titles but it would be neat if it could run CS:GO at stable 60fps. Could be a used one, I have been looking at xps 13 models from 2016 but would like to hear what you guys recommend.