Titanfall doesn't use 3GB's of VRAM... not even close. Because there's a technical issue with the game in Beta that only allows you to enable insane textures if you have over 3GB's doesn't mean its using it. Nor does skyrim. Without crazy amounts of 3rd party graphics mods (and none exist) or youre setting some ridiculous amounts of antialiasing ingame (in which you wouldn't need much at 2k and almost none at 4k resolutions), there's no way that Titanfall, using the aged source engine, possibly could... unless your're doing some 'beyond affordable multimonitor Ultra HD configuration' way outside the realm of normalcy. Battlefield 4 doesn't even come close until you start hitting 4k and higher resolutions, which unless youre hoping onto the 4k train right now, is a non-issue. Most are just now getting into 2k, and 4k is a pipedream for their budget for at least a year or two to come, which by then, there will be far better gpu's with far more RAM capable of handling it.
Titan or 780ti, they are gonna start running about the same at 4k... have all the VRAM you want. I mean, if they made a 12GB Titan, it wouldn't make the situation any better. The GPU architecture is still trying to keep up with the game at that resolution no matter how much buffer it has. Your still going to get odious framerates on a single card. You might not see VRAM stutter on a titan, but what does it matter if your framerate is already well below acceptable and playable? The VRAM is way ahead of the performance of the kepler architecture on the Titan. In fact, one could venture to say its a marketing gimmick, much alike the 8gb's of vram on a 880m (which I still LOL hard about).
There's an entire thread about this here:
http://forums.anandtech.com/showthread.php?t=2369254
This is why I went from Titans to 780ti's... Nothing I was throwing at it with 2x or 4x MSAA at 2560x1600 was coming close to 3GB's of VRAM, barely even 2GB's, most 1.5GB's or less. So the 780ti's had more cores and shaders and higher clock, which I could immediately benefit from. Thus, off went my Titans, and in went the 780ti's, with plenty of VRAM overhead, and a nice little performance gain. By the time I ever get around to buying a 4k monitor for these 780ti's to start sweating their VRAM, those cards will be long gone. In fact, likely a whole card generation in between before I even dabble into 4k.
For the record, the 780ti's have the fastest cards out right now. Even EVGA has a 780ti that beats its Titan Black... the 780ti SC ACX cooler model. The standard 780ti SC (non acx cooler) is neck and neck with Titan Black, having a higher base clock, but slightly lower boost clock. The reference (non SC model) 780ti is just a hair under the titan black in base and boost. Same amounts of cores, same amounts of shaders, higher base clock than titan black, and same boost clock. So performance crown is still in 780ti's hands.Identical or greater gaming performance for $300 less... unless you do happen to be doing those insane resolutions where your gonna need such VRAM, and like I said, that VRAM isn't gonna help you much unless you start stacking those titans in SLI, because a single one is gonna run like crap at those resolutions anywho.