For 4K, you need SLI or CF. A single 980ti may average ~30fps, but there may be times it hits ~20fps which would be terrible. Go SLI / CF or don't do 4k.OK thanks for explaining this. If that's the case then is there any point going sli for 4k 60fps as you need to lower settings to achieve this? Wheras one 980ti can hit 30fps 4k on ultra. It sounds as if the gains from sli are not worth it for 4k?
Do you think it would be wiser to wait for new technology in a year or so than go for two 980tis? Just trying to find out how future proof having two 980tis would be.
I highly doubt even next year's card will be able to do 4k @ 60fps on a single GPU.