IT Pro have a review of Apple's 12-core Mac Pro workstation

Given its status as Apple's most powerful Mac, we weren't surprised to discover that Apple had sent us a review unit with an incredibly high-powered specification. It comes equipped with a staggering 12GB of RAM and not one, but two six-core 2.93GHz Xeon X5670 processors. MacOS X 10.6 is preinstalled on a 512GB solid state disk (SSD). It's accompanied by a huge 2TB hard disk for storing all your files. It's a monster of a computer.

  12 core Apple Mac Pro Review