oops, mining MRC with -C 2 using the Z kernel is not validating for me. Some problem
in the kernel it appears... Nothing to do with yesterday's commit, as I haven't touched
that kernel lately...

Strictly speaking the Z kernel shouldn't need support for any -C flags, as a Compute 3.5
device is capable of running any read access through the texture cache...

With -a=scrypt-jane:MRC -H 2 -C 0 -l Z60x24  I get up to 1100 kHash/s per GTX 780Ti.

EDIT: hmmm, two out of 3 cards hit 90 deg C and ran into thermal throttling.

Christian