Unless you're having specific SLI issues, I'm really starting to think why would you???
I'm rethinking the situation now. I was fully expecting to switch from my 780Tis in SLI to a single 980TI, but not so sure now at all.
The big recent releases run fine (gta5 and witcher 3, once a decent driver is out even more so).
And the witcher 3 uses about 1.8gb VRAM max at 1440p. Don't feel a need now at all to 'upgrade'. I don't have a single game that is struggling with 3Gb VRAM. Baaaa I want to
***** some needless cash and need some justification