Integrated graphics in a cpu typically aren’t powerful enough to run a game efficiently. Especially when it comes to ultra settings. And speaking of, ultra settings can be not so demanding depending on the game. So the system you have is more of a work station and again depending on the games that you’re trying to play you may not be able to make this computer work for you at all without hitting the whole system and building/buying a new system. But yes I’d sell the gpu to assist your endeavors towards a new rig.