I'm getting HW errors even on I 11-13, so I don't think thats the problem.
did you compile it from source or are you running the binary version of sgminer v5??
I'm on Windows 7 so I downloaded sgminer v5 and this is what I have in my .bat file:
sgminer --algorithm quarkcoin --no-extranonce-subscribe -o stratum+tcp://pool.bitquark.info:6010 -u user.user -p pass --auto-fan -d 0,1,2,3 -s 1 -E 1 -I 16 --remove-disabled --gpu-platform 0 --shaders 2048,2048,2048,2048 --lookup-gap 2 --thread-concurrency 12288,12288,12288,12288 -g 1 -w 256 --gpu-engine 1100,1100,1100,1100