I already own a GTX 760 2GB and it would obviously be cheaper if I could just by another 760 but I'm worried it won't be able to keep up with graphics heavy games in the next year. Would 2 GTX 760 2GB be able to handle this monitor or should I just bite the bullet and get the 780 4GB? My monitor is still shipping so I'm not even sure how my 760 handles it so far.