This is your GPU returning invalid hashes from it's kernel. This is because new drivers are crap for older cards.
- Uninstall AMD APP SDK
- Uninstall AMD Catalyst Install manager: choose "uninstall all software", make sure you have only a VGA driver after restart.
- Manually remove these files not removed by the installer; any other obvious ATI files with the same file date:
C:\Windows\System32\amdocl64.dll
C:\Windows\System32\amdoclcl64.dll
C:\Windows\System32\OpenCL.dll
C:\Windows\SysWOW64\amdocl.dll
C:\Windows\SysWOW64\amdoclcl.dll
C:\Windows\SysWOW64\OpenCL.dll
- Install just the Catalyst 11.11 driver package (no SDK is needed; the AMD APP runtime is included with driver)
- Mine just a bit slower on your 6870 than a 5830 would.
Better:
- use cgminer
- set phatk worksize to 256 and underclock GPU RAM to 300MHz for best power efficiency and higher hashrate
- Uninstall AMD APP SDK
- Uninstall AMD Catalyst Install manager: choose "uninstall all software", make sure you have only a VGA driver after restart.
- Manually remove these files not removed by the installer; any other obvious ATI files with the same file date:
C:\Windows\System32\amdocl64.dll
C:\Windows\System32\amdoclcl64.dll
C:\Windows\System32\OpenCL.dll
C:\Windows\SysWOW64\amdocl.dll
C:\Windows\SysWOW64\amdoclcl.dll
C:\Windows\SysWOW64\OpenCL.dll
- Install just the Catalyst 11.11 driver package (no SDK is needed; the AMD APP runtime is included with driver)
- Mine just a bit slower on your 6870 than a 5830 would.
Better:
- use cgminer
- set phatk worksize to 256 and underclock GPU RAM to 300MHz for best power efficiency and higher hashrate
As i had the exact same problem as the first poster I followed this guide exactly with good faith it would be a cure..
Unfortunately, after restart from 11.11 install I get a blue screen of death that will never go away
any ideas on what I can do? ** startup repair worked and rolled back my old video drivers as well. Interestingly I tried one more time and now the blue screen is triggered during the instillation of the 11.11 drivers. (Before it was only after restart) might this shine some light on whats going on?