Thanks for this. Both my Toxic and Vapor-X is now running above the 810kh/s mark. 
Awsome.
Awsome. vapor-x too? :O
Yep. cgminer 2.11.2 - 1155/1800/Powertune:20/1.2v
3gpus running steady at 815kh/s.
What about invalid shares? My Toxic mines with 820 kh/s (cgminer 2.11.2) but invalid shares are 30%.