I just got a reply from Tech Support...
Hello,
Thank you for troubleshooting the problem, it does sound like the 1080 FTW is having a problem that we have identified in a small number of units and we are now correcting. It is possible that the last RMA did not fix the issue for you as we were still identifying the hardware problem with this cards when we did the last RMA, we have found the solution to the issue and would be happy to offer you another RMA for this card.
We are able to offer you an Advanced RMA replacement on that 1080 FTW. With the Advanced RMA we can send you out a replacement 1080 FTW with a pre-paid shipping label on the outside so that you can install the replacement unit, put the original in the box and use the pre-paid label to send it back to us.
In order to complete this Advanced RMA for you we will need a few things: We will need you upload a copy of your retail invoice, the place to upload that is EVGA.com > Support > Invoice Upload. When we approve the RMA you will receive an email that requests an credit card number, this card will only be charged a $1 test authorization fee which will drop off the card in 24-48 hours, this allows us to both confirm that it is a valid card and would only be charged any money if we never received the original unit back from you. We can submit that RMA for you now, first we just need you to
confirm your shipping address for us.
Regards,
EVGA