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I assume it's started doing this having previously worked ok with the tv or is it since you've used the tv? -I assume the former in which case it sounds like a faulty gpu, any warranty remaining? If so, RMA it.
i had a dead monitor that looked a bit like that, have you at least ruled out the display being the source ? by replicating it on another display
Are you using the new crimson drivers?
I cant use them on my 290x, lots of problems... I've gone back to catalyst
On my older system I use the new drivers with my 290x cards without issues mate.
Are you using the new crimson drivers?
I cant use them on my 290x, lots of problems... I've gone back to catalyst
Yes but this was happening way before the Crimson drivers came out.
I have them installed on my 290's in crossfire on my main computer and have no issues.
Could try underclokcing (the core, but in particular the VRAM) It might not be ideal, but if if it runs fine at -50MHz memory and -30MHz core, then thats better than nothing.