I have a problem. I got an XFX 6850 card overclocked to 900 core clock and 1150 memory clock with SDK version 2.4 and driver version 11.4.
When I try to use poclmb, I can't get more than ~2 Mhash/s! But when I'm using DiabloMiner I get up to ~200 Mhash/s. Anybody know whats causing this?
You probably have the CPU selected as the device to mine with. Change your -d/--device setting. For SDK 2.4 device 0 should be the first GPU. (it's 1 on earlier SDK versions)
So I should just add -d 0 to the command? Okay, I'll try that!
Edit: Yes! thank you! Now I get ~230 Mhash/s

Edit2: Okay, I got another computer with a sapphire 5770 card running with no overclock, SDK version 2.1 and driver version 10.11 (Because I read that these were the best ones on 5xxx cards, is this true?), and when I try to start poclbm, I get this error:
Traceback (most recent call last):
File "poclbm.py", line 3, in
File "pyopencl\__init__.pyo", line 3, in
File "pyopencl\_cl.pyo", line 12, in
File "pyopencl\_cl.pyo", line 10, in __load
ImportError: DLL load failed: The specified procedure could not be found.
Again, DiabloMiner works fine :/