The article which talks about AMD CPUs being all rebadged from other speeds has been disproven. It was just a theory that someone had that was wrong. Here is a useful article:
http://www.overclockers.com/tips00173/
Although it is complicated by the fact that AMD later released 1.5V TBredBs.
What is important to note is that the AIUHB and the JIUHB are good steppings
