Caporegime
Is it possible to gain 20%? that sound a lot
Asus says their RX480 is nearly 19% faster according to their bumpf:
http://videocardz.com/62392/asus-shows-off-radeon-rx-480-strix-and-rx-480-dual
The issue with the GTX1060 is that the reference RX480 tends to throttle under 1.2GHZ most of the time,and also has the power throttling issue too. Even Tarinder over on Hexus commented that their RX480 tended to never boost to the maximum 1266MHZ consistently.
So,an AIB RX480 with boost closer to 1.35GHZ to 1.4GHZ ,is probably in reality hitting close to 15% higher clockspeeds,and I suspect there will be less power throttling too.