Stop telling everyone to research it. I did plenty of games at 5760x1080 full spec with SLI 680's (2GB) and didn't hit the VRAM wall. FarCry3 was the first time I did but with 6xMSAA on (still under the 2GB buffer), I was getting less than 20fps.
Now Crysis 3 at my res resulted in me using 3.8GB of VRAM, so going on your theory, bin anything under 4GB...Make that 6GB because of consoles coming out?
Why not research it Greg? So people can take your word?
Research and analysis is what educates people.
You even said yourself that you dont use NI so what would you know about advanced tweaking and ill prove it here.....
OK Greg so you gamed on FC3 at 5760x1080 with 2GB on 680's? Doesnt that tell you at that super high resolution that AA was not working on FC3 from vanilla settings?
I explained this before in another thread that FC3 was broken at release and many tweaks were needed at NI custom flag and xml. file for it to work correctly.
I know this because myself and many others over at Guru3d spent many hours tweaking the game all giving input and i can tell you that the vanilla game was broken and you was playing with no AA even though you selected it in Menu.
You was playing at such at High Res that your probably didnt even notice the lack of AA.
Go over to the Guru3d thread and run FC3 with the tweaks to fix the game and i guarantee at your resolution with 2x680s the cards will be crippled.
Like i said a few posts back here ingame AA dont always work, Its FACT with many games.
4GB is fine and also you cant run FC3 with 6xAA or any other game as a matter of fact.
You can only run 2,4,8,16,32.
You can also combine this with sparse grid for even better visuals but takes a massive vram hit.
This can give a slight blurring( nothing like fxaa) but by adjusting the negative LOD bias of around -500 to -1000 depending on the amount of AA that use fixes the slight blurring and the visual difference is like night and day compared to vanilla settings ingame.
The new console architecture is reported to use lots of Vram so the PC is gonna need even more because the lack of specific custom gpu chips.