http://www.hwbot.org/hardware/processor/opteron_6238/
Isn't it AMD 6238 belongs to 12 core category?
http://shop.amd.com/us/All/ModelsPerLine/Server/Processor?Line=opteron%2Fopteron6200seriesprocessor&Model=opteron%2Fopteron6200seriesprocessor%2F6238&SearchTerms=AMD%20Opteron%206200
Thanks