Its strange, R9 270X does 2,1 MH, can be tuned to 2,5 by setting the engine clock from 1100 to 1250.
My R9 290 currently runs with 5,3 MH, not reacting to engine clock changes in any way.
The R9 290 run up to 6,8 MH when diff was lower, the 270X runs constantly 2,5MH not reacting to diff changes so far.
Memory clock changes have no effect on both cards....very strange algo
![Huh](https://bitcointalk.org/Smileys/default/huh.gif)
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