How does people get 7mh hash rate one 280x?
i am running with this setting on 280x core/mem 1027/1250
--lookup-gap 2 --thread-concurrency 8192 -g 2 -I 20 -w 256
the best i can get is 2.1mh
it's really strange, got 11 MHs on an old HD5970 - my HD7950 = 5.3 MHs, HD7970 = 7.1 MHs...