R9-Nano
Default clock 1000/500
430-440 sols/s
Beast of a card - excellent for ZEC mining.
R9-Fury X.... supersonic at ~450-460 sols/s
RX480 ... at best 300 sols/s (RX cards best for ETH mining)
R9-390... very good ~380-390 sols/s
then you didnt get an increase for the Fiji GPUs? i guess you maxed the power limit on the R9 Nano? I wonder why R9 Nano doesnt reach same performance a Fury X if both share similar setup
Nano vs Fury X -- big difference.
Both are fast cards for ZEC because of the HBM memory.
Fury X is the big brother. Still the fastest in the R9 class cards and it comes with its own cooling system.
Nano is small card but power packed and consumes less watts. Hard to get this card used - expensive too.
If you are using Linux - IMHO, best to go with Optiminer v1.7; otherwise Claymore v12.4 for Windows based rigs.