@patio - I didn't actually post a link to the information from Intel. Instead, I went to the page and snipped the relevant information and attached it to my post. The link I provided was to a program which can reveal the type and build revision of the processor in your system so that you can compare it.
For the sake of completeness, here are the links from Intel:
SLACR Intel® Core™2 Quad Processor Q6600 - SLACR SL9UM Intel® Core™2 Quad Processor Q6600 - SL9UM