I don't know what he has, but people have to realize that there are a few issues at play here with PC.
The first being, Ultra textures says 3GB VRAM required for a reason because 1080p with no AA takes up 3GB of VRAM with the rest of the settings maxed.
The second, 8xMSAA says 2GB and I thoroughly think they mean 2GB of VRAM by itself.
Third, this is an Nvidia game so AMD setups are butch from the start. After a while AMD performance will catch up and exceed Nvidia due to higher frame buffer.
And final, shadows set to ultra causes stuttering issues for any setup unless you're one of the lucky few. Also on shadows, shadow flickering is a bug that will need to be patched out. It comes and goes by itself and isn't hardware related. 2 problematic issues not related to performance really and can be patched out later.
So that being said, anybody complaining about 780ti or 780ti SLI issues are probably running higher than 1080p and that is their first mistake. I have 4GB of VRAM running 1200p, I run everything maxed except shadows on high and only 2xMSAA and I run consistently over 3.5GB on my card. With this setup I don't have night time driving stutter and I typically run about 50fps. All the complaining about specs and performance or cries of "unoptimised" like GTA IV are ridiculous. People need to look at their recommendations and take them seriously. One of the forum members bought a 6GB 780 and I'm waiting on his reply of performance vs 670 2GB SLI. I bet his issues are all smoothed out. A friend I know in person has 2 290x cards running 1600p and he runs consistently 50-60fps with the new AMD drivers. It's just a matter of VRAM and people expecting too much from their machine due to all the lame console ports from before. This is a 64bit DX11 only game and it's made to take advantage of high amounts of memory.