By the way, according to some information I got an AMD R9 290X only does around 6.5 MHash/s. Can anyone confirm this? If so, we've got another nVidia coin here.
My 7970 does about 4.6Mh/s so 6.5 for a 290X sounds about right.
I didn't pay attention to the other part of the message, my R9 290x is doing between 9 and 9.5MHash/s (it is about the same as the 780ti)
How do you get such a high hashrate? I tried every tweak I could think of, but couldn't get any higher than 4.6Mh/s.