So I received a 5870 today, and plan to run it in the box with my 5970.
I uninstalled ati stream/drivers and driver cleaned.
I then reinstalled with Cat 10-12 and Ati Stream 2.3... when I attempted to launch miners they crash poclbm. If I run GPU caps or GPU-z, it states open CL is 'not installed'.
I installed everything from a fresh driver clean... is there anything I can try? :/
I was mining on 5870+5970 and it worked fine.
If you are using Windows XP - ensure that SP3 is installed.
Try ATI Stream SDK 2.1 and 2.2
If you see 3 GPUs in poclbm and only one of them crashes - use special old version of poclbm to mine on a slave core of 5970.