you can, and keep the warranty, re-TIM the cards...
 
That's what I'd do.
 
 

acyroma
I'm also having the same issue sadly, my 1080ftw isnt even stable if it's underclocked slightly. I've tried everything in the troubleshooting guide, and it seemed to be stable for about 3 hours of witcher 3 in debug mode. That being said I'm still going to RMA it most likely. The card should at least be stable at its intended clock speeds. 

Have you tried my solution? Use Precision X OC and just set the fans to run at max and run your tests. Obviously you'll go back and tweak the fan settings later for less noise, but just to see if something else is overheating.
 
Is there an application that lets you view temps on other card components? If i'm right about the issue, there must be other sensors on the card that aren't displayed.
 
I'm also going to try and take the back plate off when I get home tonight and see if that helps at all.

Normally there is no temp sensor for the ram or the power bank. Has anyone taken apart the card notice any missing heat pads for the ram or power bank? Turning the fax to max wont do anything if the part that is overheating isnt touching the cooler IF that is even the problem.

Hi there,

i have got mine 1080 FTW yesterday. I have massive Coilwhine but the biggest Problem is -- Blackscreen and set Fanspeed to 100% -- i have no idea why. First i thought the coreclock or voltage i set is to high but i got the same issue with standard settings.
 
 

I think I figured it out but I need an experts thoughts.
 
So this happened to me too but only when I played Far Cry 4 without turning on a custom fan curve. This happens when the card gets too hot.  When the thermal limit of 94c is reached the black screen comes up and the fans spin to 100% to keep the card from dying.  
 
How do I know this?  I did a test using the Unigine Valley benchmark.  In Precision X OC I set everything on default without any fan curve.  I just left everything on Auto.  So first I thought..wow great zero fan speed..ok when will it kick in?  Someone told me it would kick in at 60-65c.  So I ran the Valley benchmark and the card got over 90C and was approaching the 94c mark.  The fan never kicked in!!  So I went into the EVGA precision OC tool again.  Reset everything to the defaults and ran the Unigine Valley test again...this time the fans kicked in at around 45-50c and during the test the card did approach the 94c mark at all - it never got above 75c.  
 
So I think this card needs a BIOS update or its needs something that will ensure that the fans kick in!  Test this yourself and enable the precision tool to display your fan speeds in the game.  Please let us know what you find out.
 
 

I also think its a fail safe feature when getting too hot but i dont think its a problem with core temps but rather either the ram or VRM's and causing voltage fluctuation but that is speculation. Could very well be a problem with the firmware/driver or we just have a bad batch of cards, a lot of possible reasons. Taking the backplate off and look at the thermals with a temperature gun MAY give us some hints.

gelectrode
I also think its a fail safe feature when getting too hot but i dont think its a problem with core temps but rather either the ram or VRM's and causing voltage fluctuation but that is speculation. Could very well be a problem with the firmware/driver or we just have a bad batch of cards, a lot of possible reasons. Taking the backplate off and look at the thermals with a temperature gun MAY give us some hints.

See my post above.  The problem lies with the fact that the default profile sometimes does not spin up the fans.  God! I just hope we did not do any long term damage to our cards. 

Thats not the problem, the fans dont spin when not pass a set temp for noise. When under load they spin rather it is kinda slow its to save on noise. Even if the card got to hot on the core would lower its own clock and voltage to reduce heat this is known as thermal throttling and is common. Also if there are components not touching the heat sink fans at 100% wont do anything for them. Also my issue happen both times with fans closed to 70%  with temps under 75 degrees C.

gelectrode
Thats not the problem, the fans dont spin when not pass a set temp for noise. When under load they spin rather it is kinda slow its to save on noise. Even if the card got to hot on the core would lower its own clock and voltage to reduce heat this is known as thermal throttling and is common. Also if there are components not touching the heat sink fans at 100% wont do anything for them. Also my issue happen both times with fans closed to 70%  with temps under 75 degrees C.

Wow if yours does this black screen when the temps are under 75c something is very wrong for sure. Like I mentioned I got freaked out when the fan did not kick in and the card started rising above 90c in that Valley benchmark.

Yeah thats a problem for sure, it shouldnt be going pass 83-84 by default.