Guys i use this miner
I have included a sgminer-5.1.0-dev 7z file with all of the changes listed above here:
https://drive.google.com/file/d/0B06N0FYvyFgDeHBnTVEtR3BVN2c/view?usp=sharing
and @majsta settings in my .bat file
sgminer.exe -k neoscrypt --xintensity 3 --worksize 256 -g 2 -o xxxx:xxxx -u x -p x --thread-concurrency 8192 -d 0,1
(280x+7950…3rd is 5850 and its off). 14.4 drivers, W7x64, 1000(gpu)/1500(mem) for both cards
and you can see results 
edit:
.bat file without --thread-concurrency got only HW…