I want to run cgminer for my ati 5850 and ati drivers 12.8 (i didnt installed any sdk), i try with this bat:
When I installed Catalyst 12.1 for use with my 5000 series cards I had to do a custom install and deselect SDK 2.6 and then manually install SDK 2.5. So if you didn't deselect the OpenCL SDK then the version that came with catalyst got installed and the post 2.6 versions are terrible for 5000 series GPU.
Sam