two esxi running 5.5 u1 on a cluster. and i saw hyperv-threading is inactive. then i looked hyperv-threading on bios and i didnt settings on bios that. i looked the internet and i found a document. Note: This CPU does not support Hyper-Threading. What is wrong with a design and disadvantage ?
Intel Xeon Processor X7542 - 2.66 GHz 18 MB L3 Cache 1066 MHz Intel Six Core Processor Upgrade (59Y6103) supports internal processing speeds of 2.66 GHz and external processing operations to memory at 978 MHz. It contains an integrated, full-speed, 18 MB level 3 cache. Note: This CPU does not support Hyper-Threading.