oh my god did you not look at the readme? Autoune is completely non functional for keccak.
the keccak code was hacked up in just 24 hours and barely functional. Autotune did NOT
make it in before the coin's release.

Take the example values from the README. They start with upper case F and K letters.

-L 256 -l F1024x16  for Fermi devices
-L 256 -l K1024x32  for Kepler devices
don't bother with -l T... as this is slower and requires Compute 3.5 anyways

I would also suggest to run exactly one cudaminer instance per card, as otherwise the
likelyhood of crashing is higher. only the latest code on github improves this.

Christian