290X: 2816 Shaders @ 1000Mhz, 64 ROP's, Memory Bandwidth 320GB/s (Die Size 431mm^2)
Speculating-
390X: 3240 Shaders @ 1050Mhz, 96 ROP's, Memory Bandwidth 640GB/s (HBM), Texture Compression. (Die Size 495mm^2)
+ Shaders = 15%, +50Mhz = 5%, + ROP's = 50%, + Memory Bandwidth = 100%, + Texture...