AtenRa
Lifer
(The same goes for the 980 and how people moan how the 390X is better at DX12. The 390X is a little big larger and uses significantly more power - if it isn't stronger than the 980 then the architecture has problems).
Kepler GK110 (GTX 780) = 561mm2 launched in May 2013
Hawaii (R9 290X) = 438mm2 launched in October 2013
Hawai today is faster (438mm2 vs 561mm2)
Maxwell GM204 (GTX 980) = 398mm2 launched September 2014
Hawaii (390X) and Maswell GM204 (GTX 980) are almost equals today
Hawaii was an exceptional design back in 2013, it launched 5 months after big Kepler with a way smaller die and today is even faster than GTX 780Ti (Launched November 2013) especially in DX-12/Vulkan games.
GM204 Maxwell GTX 980 came almost one year after Hawaii, its not unheard of a new design to outperform an 11 months old design.