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April 11, 2013, 10:54:20 AM |
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In your initial post it's clear you were mining on one device only, with multiple opencl instances.
SDK 2.8 sucks dicks (on linux at least), as do many of the drivers after the 11.12 prerelease driver with GCN support (which was called amd-driver-installer-8.921-x86.x86_64.run on linux for example), so I guess 12.8 is your next best bet. Uninstalling the SDK is non-trivial but you should get rid of 2.8 and try 2.7. Then make sure all .bin files are deleted so that cgminer recreates new ones with the changed SDK.
Bear in mind that some motherboards may appear to support multiple GPUs, but do NOT actually run, or barely run. My GD70 based rig would only run with 3 GPUs with the default Xorg set up using a login manager and refuse to even start with the 4th GPU in there unless I ran an absolutely stripped down Xorg with just startx us a sole user on xfce and no login manager. Usual set up of drivers is required for all the GPUs with the force option and any distribution provided drivers are a nono.
Yes folks, mining is non-trivial and scrypt mining is yet much more non-trivial. Make sure if you are building a rig that you are using hardware and software that is already known to work as others have tested on these forums before. That can be hard...
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