Well, I can't say for sure whether all the hype about the new x11 algos is definitely a thing, but I have tweaked the heck out of my settings, and am getting a really nice efficiency. When I started last week, i was getting about 4 Mh/s on my r9 290. Tried some of the bins floating around and managed to get 6 Mh/s while maintaining a stable 60C or less, with a power draw of 113W avg. I continued to tweak the settings and I finally found the sweet spot for my card.
http://i1176.photobucket.com/albums/x338/fughe/7-31-2015%205-10-01%20AM_zpsxwzoou6l.pngYou can see, my last round of tweaks has really squeezed the performance up. Stable at 64C, the vrm is well below my 90C limit, no HW errors, and stable at 9.6 Mh/s....going on 40 minutes now. And best of all, the avg power usage is only 155W, and my avg accepted hash rate with my pool (9.84 Mh/s) is higher than the rate I am showing.
Hopefully these settings will prove to be stable over long term.
