Originally Posted by provost
If your 27 inch is not 60hz. One 780 will suffice, and you will hit the fps wall way before hitting the vram wall on that resolution. If you are going to get a 780, then get two. Otherwise, you will get a lot more enjoyment out of a 690 on any 27 inch 60hz or 120 hz.
I don't know what he said his resolution was, if at all, but I wish people would realize that the size of the monitor has nothing to do with how much work a graphics card needs to do.
A 27" monitor could be 720p for all we know, or it could be 1920x1080, or 2560x1440.
If it is a 1440 monitor, I would avoid the 690 because of the vram issue. If it is just a 1080p monitor, I would still avoid it because of the vram issue, as newer games are easily using 2 GB of ram anyways. Certainly games in the next year or two will start seeing a higher maximum requirement.