what hashrate on 270x, 280x, 290, 290x, Fury?

my
radeon 7950 (sapphire, 925/1250)  - 3500
radeon 7950 (xfx, 950/1375)         - 4300
radeon 280x (gigabyte, 1000/1500) - 4300   (bin-file  from  7950)