Quote from: sundownz on February 01, 2014, 02:43:37 AM

Quote from: F9F0F on February 01, 2014, 02:37:13 AM

Quote from: sundownz on February 01, 2014, 02:31:52 AM

Quote from: jayyeah977 on February 01, 2014, 12:22:09 AM

Quote from: sundownz on January 31, 2014, 11:30:51 PM

Built two new machines with dual Powercolor 270x cards -- neither mines well AT ALL.

http://www.newegg.com/Product/Product.aspx?Item=N82E16814131532

Both 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

That seems to have done the trick along with the flags from here :

http://dustin.io/2013/12/setting-up-litecoin-cgminer-with-latest-7970280x290x-hardware/

Each one is at ~430 at stock clocks -- so will see if it remains stable.

Thanks for the help.

Well, let us know if you have anymore problems