My PSU is almost one year old and the coil whine come from the coil between the power connectors and the right water conexion.
I was thinking that it may be my PSU cos it's 4 cards with the same problem, but i read here and there that it can also be the MB.
I have a ASUS Z97WS since the same time than my psu.
I think i'll return again this GTX 980 Ti and prey to have one without this annoyning noise.
Cos if i had coil whine only in game it was not a problem, but i have it on the desktop and i can ear it trough my headphones 😕
Thank you for your answer, i start to believe that i may have more luck next time 🙂