HaiImNew :
So..... I Recently bought a Pc Build with 2 780 tis in SLI :3 and still deciding what monitor to buy, Should I get a 4k Monitor or an ultrawide monitor?
will I notice much of a difference from 1080p to 4K?
Neither - at 4K res, even with two 780Tis, you would be forced to
either 30fps, or lower graphic settings. As for the ultra wide monitor - those are quite nice for watching movies, but 16:9 videos (the most popular format) would have black bars on the sides. Also, not all games may work well with the ultra-wide aspect ratio.
The best option, IMHO, for 2x 780Ti, considering their capability and the requirements of modern games, is a 2560x1440 monitor.