Honestly im thinking we have got all what we need for rx series. Just bkz of 256 bit band. Any empruvement is only cards with 386 bit ram band.
I agree with that. The R9 390 has 512 memory bit, so it is faster.
May be. Nvidia 1070 has much less cores (1920) and Memory Bandwidth (GB / sec) 256 but fast hashed than R9 390X,R9 390 and RX480. My EVGA nVIDIA GTX 1070 hashed 430 sol/s .
Can't compare cores on NVidia to cores on AMD - the NVidia cores DO a lot more per core than AMD ones do - but for
MOST cryptocoin mining work most of that "extra capability" is wasted.
There's a REASON the 1070 blows anything AMD completely out of the water on Folding@Home work despite having fewer cores than many AMD cards - and the 1080 and Titans do so by an even wider margin.
On the other hand, even mid-upper-range AMD cards can blow anything NVidia out of the water on DNet work (which IS compute-bound cryptographic work and directly comparable to many of the older Cryptocoin algorythms like SHA256 and Scrypt in how it works).
Yup even a lowly GTX 1060 3GB, slaps an RX 480 8GB around with ZEC mining by almost 20sol/s.
Cryptonote and Dagger-Hashimoto are a different matter entirely.