Hi, I don't much about computer hardware and I want to play Overwatch at Epic settings but I'm playing using an old pc. Due to financial constraints, instead buying the latest/newest graphic card, I think buying an high end graphic card that can support my old pc might have same best gaming experience. My pc do have i7 860 cpu, Gigabyte P55-US3L motherboard and my current graphic card is Ati Radeon HD 5750.