Having issues with sgminer and windows 7 crashing or freezing a few hours after running with intensity setting over 15 with 3x R9 270 (non x), no issues with cgminer previously, I could run it for weeks mining dogecoin.  (windows 7, 13.12 catalyst)

sgminer will run fine at 14 intensity at basic settings like below but I only get about 1.2 to 1.3 MH per card

sgminer.exe -k x11mod -I 14 --gpu-engine 1050 --gpu-memclock 1250 -o stratum+tcp://drkpool.com:3333