I’m using an HP ProBook 4430s. When I’m in the middle of a game (usually high ram consuming game like League Of Legends), my computer sometimes hibernates itself (I think it’s hibernating because when I turn on again, it says “Resuming Windows” and all things are still there)
I have to note that this only happens when I play high ram consuming game. Games that have experienced this incident : GTA IV, Dishonored, League Of Legends
Ultimately, getting a desktop gaming machine or even a gaming laptop would be the permanent fix but with a few cautions and adjustments you should be able to run your games at lower settings on your current machine.
You have to be a little bit crazy to keep you from going insane.