Legit Reviews found out that AMD will not release its Phenom II X4 960T "Thuban" processor to the retail market. It appears AMD doesn't want people unlocking these chips into six-core processors, and that these processors may only be available in OEM systems with motherboards without the core unlocking technology.
I’ve been asked the question about whether there will be a Phenom II X4 960T “Thuban” quad-core by enough individuals, that I think it is a good idea to proactively share the answer to everyone. While there are indeed engineering CPU samples floating around of a 4-core Thuban 960T, I do not expect that processor will be released for general availability. Perhaps it may make its way to OEMs by special request, but that remains to be seen.