Something strange are going.
worksize 256
vectors 1
aggression 20
threads_per_gpu 1
sharethreads 32
lookup_gap 2
gpu_thread_concurrency 24576
I got ~600khash\s with that config on 7950 xfx black 1000mhz core \ 1375mhz memory
but
I got ~360khash\s with that config on 7970 msi lightning 1160mhz core \ 1400mhz memory
and the maximum I got from 7970 is ~550khash\s when the following config was used:
worksize 256
vectors 1
aggression 13
threads_per_gpu 4
sharethreads 32
lookup_gap 2
gpu_thread_concurrency 8192
May be I am doing something wrong? Why 7970 with greater clocks and hardware power are worse on the same config?