I'm looking to buy a 1440p Ultrawide and currently have a 770. My 770 has trouble on my regular 1440p monitor in terms of maxing games so I was going to buy a 980 along with the new monitor. Do you think a single 980 will be enough for an ultrawide or will I need to SLI it? Either way I will be buying just one at first and then adding a second one if needed but I'm just trying to get an idea if I will need it or not so I can budget. Thanks!