I simply don't get this 8.5m 280x results. I've downloaded the latest cgminer, tried every setting I've found here and can't get it above 7.6m. w7 x64, catalyst 14.1, gpu/mem 1055/6000, --vectors 1 -I 8 -w 256 --gpu-powertune 20 --no-submit-stale => 7580