6 screens? you'd need 9 surely
so you could do it then. nice.
Keep in mind that you can use 5-6 GPUs at the same time in certain AMD/ATi drivers.
So you could say do 6x 290 to display to 6x 4k 60hz at the same time.
On the previous cards a lot of people get tearing and vsync didn't work because the cards were not capable of 3x 1080p in raw pixel clock performance so it was simulated with the impacts of tearing.
I know that AMD has improved the situation with the third monitor on the 290 but what is the new limit? I suspect strongly 3x2160p will exceed it and have similar issues but does anyone know what the genuine hardware limit is now? Its kind of important to know it if going above 1080p resolutions.
Eyefinity though, which is what the OP inquired about, runs off of one card.
Also bear in mind that Eyefinity is software that is currently hardware limited.
As soon as ATI makes cards with more than 6 display controllers per card or display controllers capable of higher than current resolution, Eyefinity can keep up. 😉
is there a reason you can't use 2+ cards for their ports?