I get 0 HW errors
sgminer5.10-dev nicehash build november7,2014
298Kh/s
1040/1500
R9 290X
14.6RC2 (june23) CCC
worksize: 64
gpu-threads: 2
intensity: 15
What's the difference you're getting from 14 to 15 intensity? I've got a very little speed up
I can get it up to 470Kh/s but it won't produce any shares either accepted or rejected; just HW errors.