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I have a dual opteron machine. Each opteron processor chip has two processors in it. So, the computer has a total of four processors but they are spread across two physically seperate chips. I jumped the gun with Vista and bought the professional version only to find out that it does not support multiple physical processors (only Ultimate does). So, what versions of Windows 7 support multiple physical processors? I am guessing that, once again, only Ultimate does.
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Answer accepted by question author
Professional, Ultimate and Enterprise support two physical processors. See http://www.winsupersite.com/win7/win7_skus_compare.asp.
The processors must be identical. See http://forums.mydigitallife.info/threads/10262-WIN7-x64-BSOD-with-Multi-Processor-installation
