I just want to point out how silly the 780 Ti is priced. People, this card trades blows with the 780 Ti while giving you an extra GB of VRAM. It should cost at least as much as the 780 Ti. Or better yet, the other way around! 😉
I had Sapphire R9 290x and currently owns Ti 780 windforce 3X OC, bought the R9 @ black friday, sold it during the mining craze and replaced it with the TI.
Always been an AMD/ATI supporter (from 9500 pro, X850XTX, 4870, 5870, 6970, 290x; I did have 8800 GTS in there somewhere), I have to admit the TI gave me substantially better 'overall' experience with modern games (SC2, LoL, AssCred, Infinity, X-com):
1. Games just run! No hiccups on settings, no manual tweaks to get MSAA to work. GEFORCE EXPERIENCE is substantially better than RAPTR.
2. Frame rate 'feels' more stable. Granted I only run 2560 x 1600 or 2560 x 1080 @ 60hz nowadays. Nvidia Adaptive V-sync is better than AMD's plain V-sync.
3. None of my games PLAYABLE settings to come close to using the 3GB. I think Nvidia choice here is quite balanced. Yes I can load textures, AA, etc to get it past 3GB mark, However by then the FPS would have dropped down to 30s. For 60 or 120 FPS, I think 3-4GB is just perfect.
Maybe SKYRIM mods can breach the 3GB, I don't have that game. I honestly don't understand running SLI / X-fire with only 3-4GB 'effective' memory. By the time 4K takes hold, the TI will already be sold anyway, potentially for MAXWELL version of it.
4. Actual gaming power consumption at 60 and 120FPS are lower with the TI (overclocked at that). However, if you run both to max OC and load (i.e. sub 60 FPS), TI roughly equals the R9 on power draw, albeit with less cooling requirement. It seems Nvidia have the better TDP design overall.
5. Nvidia SHIELD!, bought it on an impulse. Now I think it's the best thing since sliced bread.