pen

I recently got hp stylus 1.51 mpp pen and i can't figure out how to pair it with my Lenovo ideapad flex 3 can anyone help me

I want to max out triple A games at 1080p 60fps for at least 2 years. Will the Asus Strix 970 or 390 Strix be a better option? I'm leaning towards Nvidia because of the extra features, temps and power usage, drivers and free games. But the only thing stopping me from purchasing a 970 is it's...