I have 6x Sapphire R9 290 reference design using kalroth 3.7.2 with xintensity... I run all but 2 of them at 1050/1500 clocks, those 2 can only run engine up to ~1025 with good stability (and they get ~915+Kh/s), a few could actually run up to 1070 (which gets ~950Kh/s) engine clocks. Anyway with 1050/1500 clocks, xintensity 500, tc 20478 I'm getting 930+Kh/s 
Now some detail on where I came up with my settings:
I use "xintensity" 500 because it's just slightly higher than "intensity" 20, which I can explain:
Intensity explanation from the dev who wrote it if you'd like to know: https://bitcointalk.org/index.php?topic=87022.msg956792#msg956792
For thread concurrency I use 20478... I came up with this value by 2560 (# of my shaders) times 8 which equal 20480, minus 2. I'm not sure why the minus 2 seems to be the good spot, but if I use exactly tc:20480 it produces less hash rate. I tried multiples all the way up to 13 (tc: 33278) but anything over 20478 didn't seem to drastically help, so I just use 2 under the lowest multiple (8 in my case) of shaders that produced a good hash rate.
For my temps I set the target at 85, I have these 2 rigs (3 cards/machine) running in a spare bedroom (with a small fan blowing out of the room) and the temp in the room is usually 80*F due to the miners running but I do have a 20" box fan blowing directly on them. Needless to say the card's fans are usually at 85%+ due to the high ambient heat, I probably need to move them out to the garage to have more space to dissipate the heat generated.
If any of this helps anyone, any donations are greatly appreciated
LTC: LWHgLSxi3iLHGQ4ESME6Tj4STcpX5p3yTD
BTC: 1DeAqKqi2QGw1bQNJQQu1W8KqWxUi2EkNi
Couple shots of my rig, I'm actually up to 9 GPU's in this frame now instead of the 6 shown... Sorry they're blurry, got bad lighting in the room
http://i.imgur.com/UvxL3Lm.jpg?2
http://i.imgur.com/n87HTOy.jpg
Now some detail on where I came up with my settings:
I use "xintensity" 500 because it's just slightly higher than "intensity" 20, which I can explain:
- The raw value of "intensity" is 2 to the power of "intensity", so "intensity" 20 (which I previously ran) is a raw intensity of 1048576.
- "xintensity" is computed as a multiple of the number of shaders (2560 for my r9 290). So my "xintensity" 500 is raw intensity of 1280000.
Intensity explanation from the dev who wrote it if you'd like to know: https://bitcointalk.org/index.php?topic=87022.msg956792#msg956792
For thread concurrency I use 20478... I came up with this value by 2560 (# of my shaders) times 8 which equal 20480, minus 2. I'm not sure why the minus 2 seems to be the good spot, but if I use exactly tc:20480 it produces less hash rate. I tried multiples all the way up to 13 (tc: 33278) but anything over 20478 didn't seem to drastically help, so I just use 2 under the lowest multiple (8 in my case) of shaders that produced a good hash rate.
For my temps I set the target at 85, I have these 2 rigs (3 cards/machine) running in a spare bedroom (with a small fan blowing out of the room) and the temp in the room is usually 80*F due to the miners running but I do have a 20" box fan blowing directly on them. Needless to say the card's fans are usually at 85%+ due to the high ambient heat, I probably need to move them out to the garage to have more space to dissipate the heat generated.
If any of this helps anyone, any donations are greatly appreciated
LTC: LWHgLSxi3iLHGQ4ESME6Tj4STcpX5p3yTD
BTC: 1DeAqKqi2QGw1bQNJQQu1W8KqWxUi2EkNi
Couple shots of my rig, I'm actually up to 9 GPU's in this frame now instead of the 6 shown...
Sorry they're blurry, got bad lighting in the roomhttp://i.imgur.com/UvxL3Lm.jpg?2
http://i.imgur.com/n87HTOy.jpg
