Has any found a method to booth the S2600CO using the E5 V2 ES QDUA processor?
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Nope.
Those are early, pre-release Intel engineering sample CPUs and will not work with a production BIOS.
http://www.intel.com/support/processors/sb/CS-030747.htm?wapkw=es+processors http://www.intel.com/support/processors/sb/CS-030747.htm?wapkw=es+processors
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