Well that was disappointing..

My RX 480 8GB is getting 2.53% lower hashrate on v11.0 compared to v10.2

optimal setting
v10.2 -h 1024, -dmem 1
v11 -h 512 , -dmem 1

Anyone getting better results with their RX 480 8GB?

~edit
I got the Sapphire Nitro version