[dragandj]

On the other hand, my 3 year old R9 290X runs a heavily optimized OpenCL code at the 70% of the speed at which my brand new Nvidia 1080 runs the equivalent code. 1080 costs close to 1000 euro, while R9 could probably be found second hand for a hundred, while 480/580 is faster than 290X and costs 300 eur brand new.

[fizixer]

Oh boy. That means it quite possible if an 8GB 290X is benchmarked against a 580, the 290X comes out on top.

I'm not a big fan of nVidia either. I think nVidia and AMD used to compete on GPU technologies; now they compete on shenanigans.