I'm getting significantly lower hashrates on my 290x than you are, so I'm going to try the sgminer in your signature with the settings in your codebox. Are you on Windows? I'm Win 7 x64 with 14.4 drivers.
14.6RC2 or 14.7RC will offer speed increases over 14.4 for X?? algorithms.
Correct. 14.6RC1/2 & 14.7RC have a performance-type increase with groestl, which is not inherent in 14.4
An alternative working configuration for 290X is
This is particularly for 2 Sapphire R9 290X 1000/1250 stock + 1 Sapphire Tri-X OC 1040/1300.
You must basically hard-code your gpu-engine to match your stock on 14.6RC1/2 & 14.7, auto-gpu does not work on these drivers and if you set something lower or above your rated stock clocks, the sgminer instance keeps trying to reset your GPU every 2 seconds to whatever you specify, but fails to ever do so.
Thanks for sharing that. I'll try the NH portion of your config and see if I can get it working. Are you using the version of sgminer available on NiceHash at
What are your hashrates and where are you telling the server what they are so it can decide which algorithm to change you to, or is there any need of that?
Thanks for your config and your help.