DigiHound wrote:
I'd look to Titan for a screen resolution that high -- you're going to need RAM, and lots of it. 3x 2560x1440 is going to push even a single Titan -- I've been benchmarking one at 3x 1920x1080, and while it can drive Crysis 3, it can't drive it maxed out with AA enabled.
For 3x 2560x1440, I think you'd want dual Titans. You'd definitely want dual Titans over quad-SLI with two GTX 690s. Scaling above 2 GPUs isn't great, and you run into increased microstuttering problems.
The problem is if you went dual Titans you are still not getting any memory increase. I mean 6GB is a lot for a single card but as you mention at those resolutions you are soon going to hit the barrier on textures for 3 screens.
Take for example one of the "recent" games I played on 3 (ish) different setups and that's BF3, examples are Ultra settings no other fancy stuff.
1920x1080 on a single or twin 1GB 560Ti set to max fps of 60 = memory limit reached and fps drops rapidly after 5 minutes of gamesplay
1920x1080 on a single or twin 3GB 7950 = 1.2 - 1.5GB of used VRAM over an hours gameplay
5760x1080 on twin 3GB 7950s = about 2 - 2.2GB of used VRAM over an hours gameplay
these are not exact numbers I have no idea about scaling of VRAM in games over 3 screens but it doesn't triple the numbers which is good. The issue you are going to have is 2.2GB is taken with 6 million pixels, you are asking the card to do almost double that at 11million. In theory BF3 will only take 4.5GB but then it's heading towards a year and a half old, You have things like Crysis 3. I may test this later on Ultra and see what my VRAMs on single and triple wide but you're right in saying it will probably push the 3GB I have at 5760x1080 and on a set of Titans would push the 6GB on those at 7680x1440.