I'm rocking various (Sapphire, XFX, Gigabyte) 270 & 270X and am getting 2.05+MH/s! 
Settings:
With previous software I was using 2 threads with other settings than above, but with the optimized x11mod and after a LOT of testing the past couple days that's the "best" I have so far. I can push it faster but that seems to be pretty stable across all 5 of my machines (27 GPUs, > 50MH/s). If anyone has any better settings for 270's please pass along
Curious, what voltages are your cards at? I have various 270s and the voltages are across the board, but some are 'undervolted' from the factory (1.100) - not sure if this new miner requires more power but i'm having some stability issues with almost all the settings I've found on this thread so far, about to try yours. Settings:Code:
"gpu-threads" : "4",
"gpu-fan" : "75-100",
"gpu-engine" : "1200",
"gpu-memclock" : "1200",
"gpu-powertune" : "20",
"kernel" : "x11mod",
"temp-target" : "75",
"temp-overheat" : "88",
"worksize" : "64",
"shaders" : "1280",
"thread-concurrency" : "6401",
"rawintensity" : "32768"
"gpu-fan" : "75-100",
"gpu-engine" : "1200",
"gpu-memclock" : "1200",
"gpu-powertune" : "20",
"kernel" : "x11mod",
"temp-target" : "75",
"temp-overheat" : "88",
"worksize" : "64",
"shaders" : "1280",
"thread-concurrency" : "6401",
"rawintensity" : "32768"
With previous software I was using 2 threads with other settings than above, but with the optimized x11mod and after a LOT of testing the past couple days that's the "best" I have so far. I can push it faster but that seems to be pretty stable across all 5 of my machines (27 GPUs, > 50MH/s). If anyone has any better settings for 270's please pass along
*EDIT* Never mind, this is what my Sapphire 270s look like after running for 2 min
Code:
GPU 0: 43.0C 2923RPM | SICK / 0.000h/s | R: 0.0% HW:0 WU:0.000/m rI:32768
GPU 1: 52.0C 2861RPM | 584.6K/590.3Kh/s | R: 0.0% HW:0 WU:0.018/m rI:32768
GPU 2: 35.0C 2854RPM | OFF /4.162Kh/s | R: 0.0% HW:0 WU:0.000/m rI:32768
GPU 3: 48.0C 2881RPM | 622.3K/613.7Kh/s | R: 0.0% HW:2 WU:0.003/m rI:32768
GPU 4: 51.0C 2900RPM | 644.1K/632.9Kh/s | R: 0.0% HW:0 WU:0.010/m rI:32768
GPU 5: 55.0C 2890RPM | 624.3K/628.5Kh/s | R: 0.0% HW:0 WU:0.008/m rI:32768
GPU 1: 52.0C 2861RPM | 584.6K/590.3Kh/s | R: 0.0% HW:0 WU:0.018/m rI:32768
GPU 2: 35.0C 2854RPM | OFF /4.162Kh/s | R: 0.0% HW:0 WU:0.000/m rI:32768
GPU 3: 48.0C 2881RPM | 622.3K/613.7Kh/s | R: 0.0% HW:2 WU:0.003/m rI:32768
GPU 4: 51.0C 2900RPM | 644.1K/632.9Kh/s | R: 0.0% HW:0 WU:0.010/m rI:32768
GPU 5: 55.0C 2890RPM | 624.3K/628.5Kh/s | R: 0.0% HW:0 WU:0.008/m rI:32768
p.s. i used gpu-vdcc to raise them to 1.175v just in case
I've noticed now that not all of mine like the 1200/1200 clocks from that previous post... If one of my machines hangs with the settings below I've switched them to 1130/1400 clocks which all of them seem to be ok with. I don't feel like wasting the time to set the GPUs individually, lol. I've also changed thread & intensity settings since the new version with support for higher intensity was compiled. I now run:
Code:
"gpu-vddc" : "1.155",
"gpu-threads" : "2",
"gpu-fan" : "75-100",
"gpu-engine" : "1200",
"gpu-memclock" : "1500",
"gpu-powertune" : "20",
"kernel" : "x11mod",
"temp-target" : "75",
"temp-overheat" : "88",
"worksize" : "64",
"shaders" : "1280",
"thread-concurrency" : "5121",
"xintensity" : "500"
"gpu-threads" : "2",
"gpu-fan" : "75-100",
"gpu-engine" : "1200",
"gpu-memclock" : "1500",
"gpu-powertune" : "20",
"kernel" : "x11mod",
"temp-target" : "75",
"temp-overheat" : "88",
"worksize" : "64",
"shaders" : "1280",
"thread-concurrency" : "5121",
"xintensity" : "500"