Get 2x 7970's I have a gtx 690 and it DESTROYS every game at 1080p but it doesn't have enough Vram for 1440p to run every game.
I'm confused, by "DESTROYS every game at 1080p", do you mean loses by 9%?
At higher resolutions (below), 2% is a wash, but with the GTX 690, you get a much quieter and much more efficient system with better overall airflow, and better driver support.
Quote from the review posted by BigMack:
"Looking at other contenders for a moment, you'll find that you simply don't need a GTX 680 2-way SLI when you can just buy a GTX 690 that runs quieter and saves an expansion slot because the price-performance ratio of a 3-way GTX 680 configuration is bad. AMD's HD 7970 GHz Edition CrossFire setup has its moments, but flunks far too many tests due to poor multi-GPU driver optimizations by AMD."
http://www.techpowerup.com/reviews/NVIDIA/GeForce_GTX_Titan_SLI/24.html
But this is 2013, the year that reviewers really started to embrace frame latencies as a more accurate measure of how well a card performs. That is where the Titan shines.
Quote:
"When it comes to a consistent gameplay experience, the TITAN is head, shoulders and knees above its compatriots. The low standard deviation shown between frame times is a fraction of what other solutions offer, which in turn leads to significantly smoother onscreen performance. For example, the GTX 690 exhibits many of the issues normally associated with dual GPU cards like minor stuttering and outright frame hesitation, a situation the TITAN deftly avoids by virtue of being a single core solution. Gamers won’t have to wait for the latest SLI profile for optimal new game support either. So while the GTX 690 may outclass the TITAN in terms of raw framerate production, the GK110 clearly holds the edge this key area.
Even though it is a single GPU solution, AMD’s HD 7970 GHz just isn’t in the same league as the GeForce TITAN. Its comparative frame times border on abysmal and no amount of overclocking will improve that fact. Had AMD addressed the stuttering in key games like Far Cry 3 and Hitman Absolution (both of which are Gaming Evolved titles I may add) we could be having a very different conversation right now, especially considering the GHz Edition’s strong framerates."
http://www.hardwarecanucks.com/forum/hardware-canucks-reviews/59785-nvidia-geforce-gtx-titan-6gb-performance-review-19.html