So not enough for dual 1060s, but enough for dual 1080s? What sense does that make? If that were the case, the 1070s and 1080s wouldnt have SLI
3.0 x8 is enough for dual GPU, its just not enough for triple GPUS. We've known this for awhile.
The rumor is only the 3GB model cant SLI, the 6GB model can. nvidia is probably trying to avoid any vRAM outrages like with the 970. SLI 1060s would be terribly held back by 3GB of vRAM, and you know people would be complaining that nvidia screwedup again. So they simply removed the option altogether to prevent the future complaining and baseless claims of gimping on the fourms