In case anyone is running 6970 cards:
After trying numerous configs, this is my setup using the modded sph-sgminer for 6xxx/5xxx cards...
sgminer -k x13modold -o stratum+tcp://multipool.cloakcoin.com:8066 -u C4ebM1pcKtwfSseLxQsMBrCXD8WB9DqFCW -p x -w 256 -I 20 -g 5 -s 5 -E 25 -Q 2 --thread-concurrency 8192 --lookup-gap 2 --no-submit-stale --gpu-engine 955 --gpu-memclock 1475 --gpu-vddc 1.05 --gpu-fan 72 --gpu-powertune 20
Pulling ~1.45-1.55 MH/s per card.
Hope it helps someone get the most out of their cards

Please feel free to tip a thanks at Cryptsy to my trade key below
