There should be a link on Hexus somewhere, or google for unlocking Tonga cores. The soft unlock utility said my 285 is locked down and couldn't be unlocked though.
Yes, I would have liked to have seen a 2GB 380 in the review mix as I think that is the main competitor. Last I saw Novatech were selling them for £120, and when I bought my 2GB 285 I found benchmarks showing it faster than a 4GB 960 hence this is my first AMD card for over a decade.