I can only get "bursts" of 1/2 the hash rate on my R9 280X with all the various suggested settings (overclocking, 8193 thread, xintensity, etc.) I'm just not get a steady rate unfortunately and it averages less than 1/2 for me. Will just have to keep watching to see when it will become more profitable for me.
Also keep in mind that most people see fairly significant power savings when hashing scrypt(n=11) vs scrypt(n=10). My 290s can be tuned up to 470KH/s with low reject rates, and use less power then when they are hashing scrypt at 850KH/s.
Anyone trying the mixed algo configs on the development versions of sgminer? You can set up load-balanced or quota pools to mine scrypt and nfactor at the same time on a single GPU. Or set up failover mode, primary pool mines scrypt and failover mines nfactor. Would be interesting to see how the "p=" setting can play into getting the GPU to mine nscrypt only when its profitability it higher than scrypt. It might be interesting to try once the idle bug is fixed and implemented in the capable versions of sgminer.
I made a post somewhere above about this. I showed how you can use p= to automatically switch between nscrypt and scrypt depending on what is more profitable (within a margin of error). The idle bug does throw a bit of a wrench in this tho.
(Personally, I'm not mining here until the idle and p= problems are resolved. But I have been buying hashing power on occasion.)
