That depends on you, do you demand max settings 1440p 144fps in every game? Then not very long. Do you play on 480p sd tv and don't care about graphics and framerate? Then probably over a decade. You will find most people on this forum hate the word "future proof" because there is no such thing, how long a computer will last for you is up to you and the rate at which technology progresses. So what do you plan to use this pc for? If its for gaming what games at what settings?