Quote Originally Posted by jeanguy2 View Post
Mumak, Suggest that you do a full uninstall of AMD CAT drivers and then re-install them. Select Xfire upon restart and then re-start BOINC. I also once experienced sluggish BOINC and windows 7 performance when I added Xfire card without doing full driver re-install. Are you getting an error readout with your stuck WUs? If so what is it?
I did a complete CAT reinstall when I put the new card in, also enabled Xfire. Now I set it to No New Tasks, performed another reinstall + reboot, will see... Decreased from 16 WUs/GPU to 12/GPU. There are few errors per day of all sorts like "Invalid kernel name", "Kernel execution time estimate too high, exiting.", "Extracting GLCM features... ".
What do you think, is it better to crunch in Xfire or not ? Not sure how Xfire is used for computing, but WUs are assigned to both GPUs in this config anyway, so theoretically it should not be needed to run in Xfire.