How does dmidecode show hyperthreading is disabled?

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Issue

We have 3 identical servers, all are HP Proliant DL580 G7 with the advanced iLO licenses installed in each. The iLO reports that each server has 2 quad-core CPUs, however when the command cat /proc/cpuinfo is run on all 3, 1 of the 3 is reporting 16 processors, while the other 2 report 8 processors, as they should.

Environment

Red Hat Enterprise Linux 5.6

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