Hi all, here are some quick tuning tips I've found.
So far I've been able to take:
680 GTX from 40,000 khash to 120,000 khash
780 Ti SC from 130,000 khash to 190,000 khash
And I've successfully found blocks.
Best settings I've found so far on both the 680 and 780 "K1024x32" - Increases 15,000 khash from most other settings tried
Set maxcoind.exe CPU affinity to at least two less cores - Increases 15,000 - 40,000 khash when a few cores aren't in use
Leave a Chrome browser or simple video/flash game running - Increases 50,000 khash or more if GPU is stepping low, crude solution till I figure out a way to disable stepping/power savings
Overclock yields more khash, no brainer
If you get ANY errors starting up Cudaminer, compute capability, exceed warp, out of memory, etc., you are not mining correctly! This will produce wild results such as millions of unexplained khashes.
More to come, busy days for me, but I'll try to get a basic guide out for cudamining and tweaking maxcoin.