So yeah, I wanna upgrade my GPU and I have no idea whats the best card to go with. Stopped following tech for a while now, I'll be using the card for gaming purposes and plan to setup dual monitors. So my questions are, Which card is better? Will dual monitor setup drasticly affect my performance? Are any of these cards capble of dual monitoring? Also I own a Corsair XH620 wat modular power supply will it have trouble running either of the cards (At the moment im using I7 2.67 GHZ, Radeon sapphire 4890)? Sorry for the dumb questions and please answer Tyvm!