I have a 6 cube setup at my office (UK), but not touched it in at least 2 years, so will see if I can get it running and get back to you with some speeds and die situation, not even sure if I can remember how to use it

I know there are quite a few dead dies, it arrived liked that so KNC shipped me extra cubes, hence why there are 6 cubes instead of 4, plus I'm sure I used GenTarkin's firmware on them which optimised the voltages and clocks.