just wanted to make sure we were comparing apples to apples.
290x x4 on one machine pushing 5760x1080.
the laundry lists on this machine requires much patience.
amd support is also worthless.
so definitely four day late and four dollar short.
as for the 680 4GB x3 it replace. there was issue too, but it never left me game less. nvidia support is okay too. at least they "reply" to support requests with half-working bandages.
280x on four other machine pushing 1920x1080.
on ALL four machine. aside from the random no-wake bug during windows (which required a reboot) and the random no display bug during boot (which required another reboot).
for the most part - it works. (imho - simple setup like this should be totally bug free)
as for the three 680 2GB and one 580 1.5GB it replace. there was absolutely ZERO issue.
lastly. by disabling crossfire and running a single 290x pushing 5760x1080. it will runs fine all day. twice on weekends.
sadly a single 290x will only deliver ~30fps at ultra / ~60fps at medium. some of us only game at ultra setting with 60fps minimum. :biggrin:
btw. what kind of setting are you gaming on 4k. also what kind of fps are you getting?