I am in the process of building a dually. I was going to buy P!!! 800EB processors because as I understood it, these were not made with the cA2 stepping. I was going with the 800 as a minimum because I thought I'd for sure get cB0. According to this: Intel pdf document, the 800EB does in fact come in cA2, cB0, and cC0 steppings. Worse yet, Intel says that the cA2 stepping is not supported with SMP. Now how the heck can I buy a processor and know that I am getting the stepping I want. I've not seen any online vendors who will tell you what stepping the processor they are selling is - much less guarantee you're getting the right stepping.