Built two new machines with dual Powercolor 270x cards -- neither mines well AT ALL.
http://www.newegg.com/Product/Product.aspx?Item=N82E16814131532Both systems crash all the time with GUIMiner and produce tons of hardware errors with CGMiner (probably 99% HW errors)... trying replicate any .bat or .conf files from others with single cards does not work at all.
Any ideas ?
I have 10 other systems running dual cards... but 7950 and 7970 -- all no problem... but can't get these R9 270x cards under control at all.
Can you post a copy of the launch commands you're using? It sounds like your intensity is too high, or the memory, core clock is too high.
I have stripped CGMINER all the way down to simply "-I 14" for flags and the GPUs at stock speeds -- speed is only in the low 300s and HW errors like crazy. Most people are adding large TC figures of ~15000+ but if I go over 8192 it simply errors out.
With GUIMiner I can run ~430 but the systems crash in ~30 minutes -- most people report 450-480 on the R9-270X is no problem.
Well my MSI 270 none X does 472 just fine without any HW issue. Any chance that you have forgotten to set the following command?:
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECT 1
Each one is at ~430 at stock clocks -- so will see if it remains stable.
Thanks for the help.