First off, I'm sorry and almost sure this has been answered before, but I've looked for a while and tried a bunch of things, and I give up.
I have a 6870 that I'm trying to get mining on Windows XP 32 bit. Got the catalyst drivers and stream sdk installed. Tried 11.6 and 11.5 GPU-Z says that I don't have opencl installed. Guiminer says the same thing. I am using the card for the display, and the catalyst control panel launches (ie. the card is working).
I had the same problem trying to get a 5830 to work on a different xp 32 machine, but I got it to work on windows 7 64 super easily. (windows 7 not an option on this--just a via nano with 1 gig)
For this computer, it's either xp 32 or linux. I might go back to linux, but I followed one of the really popular guides to mining on ubuntu on here, and a couple hours later, after a reboot, my linux got hosed.
And the stupid default ubuntu installer hosed my windows xp boot-capability. So I started all over and figured windows should be easy.
Thanks for any help!