3.1b performance
R9 280x - 350TRT
R9 290 - 250TRT
290 is 1.4 times faster
cgminer
R9 280x - 720Kh/s
R9 290 - 850Kh/s
290 is 1.18 times faster.
Claymore i have plenty more 280xs then 290s. how much faster do you think you can get them 280xs?
Today I will release new version with good speedup for 280x, 270/270x and 7xxx cards.