Questions about CoD on 1440x2560 displays

[Jaws2002]

Originally Posted by SharpeXB

evga makes a 4gb version of the GTX 680, I wonder if that would do the job?

From the review results I've seen, most single GPU cards/single card setups, except maybe the new Titan, are lacking performance at that resolution. The results in most games are going to be below 60fps. I just looked at one test review and the 4GB 680 was around 5fps better than the 2GB version, so I'm not even sure how great that would work.
For that resolution the SLI/Xfire setups and dual GPU cards are king, now that is very dependent of how well the game is optimized for SLI/Xfire.
I think for now, unless you are prepared to throw a lot of money at the computer, sticking to a lower resolution is way easier, specially for a poorly optimized game like CLOD.

Can you do SLI with two differnt cards? like a 670 and 680 together?

No idea.