The SC and ACX base model are the same PCB right? The FTW is different for sure.
My 1080 ACX 3.0 doesn't have coil whine - my Gigabyte 980 Ti did though.
Brenex
I just finished burning in my 1070 FTW (>10 hours) and it still has noticeable coil whine when at high FPS. I'm using a corsair 450SFX which got great reviews in regard to its ripple so I am really leaning away to it being a PSU issue. What is the process of RMA-ing the card?
Have you tried the card in a different PC that has a fairly powerful GPU/PSU that doesn't coil whine? That's a good way to check and see if it is your card.
If you can't check that, register your card if you haven't -
https://www.evga.com/support/register.asp Then call or email EVGA to start up a RMA -
http://www.evga.com/about/contactus/