7950 has 1792 shader units, so try setting --shaders 1792 and experiment with a thread concurrency that is a multiple of that, i.e. 3584, 7168, 8960 etc. Also try updating to a newer Catalyst driver set. I got better results on Catalyst 13.9 than the old 13.4 or something I had first.
Thanks man, got +5kh with catalyst 13.9. Not much but hey everything counts
My settings on sapphire dualx 7950 are:
gpu 1023, memory 1225, 1,1v set with sapphire trixx
--shaders 1792 --thread-concurrency 7168 --lookup-gap 0 --I 13 --g 2 --w 286
getting 265 kh
One question, if i add r9 270, can i run two different settings (for different cards) in vertminer?
Always when i got gpu 0 failure it was a problem with too high of thread concurrency. If you set too high gpu threads it freezes the system, same with intensity
you can always use --g 1,2 --engine-core 1000,900 etc to tweak the settings for each individual card.
You cant run two cards on different number of threads (-g) on cgminer. Only Sgminer allows that.