before: 600 kh/s
with new sm kernel: 675 kh/s

GPU: GIGABYTE Radeon HD 7950 GV-R795WF3-3GD (rev1.0)
OS: Windows 7
driver: 14.4

sgminer.exe -o stratum+tcp://boostpool.com:3333 -u FWGzrSTY8YXZkifPrmidjinNVUMyCBu7pk -p ***@gmail.com --gpu-engine 1085 --gpu-memclock 350 --intensity 22 --gpu-threads 1 --worksize 256 --gpu-powertune 20