ESX reports hyperthreading supported but not enabled
November 11th, 2007 | 
Author: Normally you must enable hyper threading in your server’s BIOS before ESX will report it as enabled on the Configuration tab in the Processors section.
For some reason IBM’s HS21 blade with Intel 5160 Xeon processors incorrectly reports hyper-threading by ESX as supported but not enabled. I thought I was losing it when I could not find where to enable hyper-threading in the blade’s BIOS. Turns out the only Intel processor that uses hyper-threading is the Pentium 4 workstation processor.
In fact, the entire family of Intel 5100 server processors do not have hyper-threading. For that matter, Intel does not make a server processor with hyper-threading.
Intel server and workstation processors
VMware Communities: IBM HS21 Blade Servers …
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