Fujitsu PRIMERGY BX620 S4 Operating Manual page 58

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CPUx Status
Defines whether the selected CPU can be used for booting (Enabled) or
not (Disabled). The current boot CPU is marked by an asterisk (*).
You should only disable a CPU if it has reported an internal error. The
error is recorded in the system event log, which you can view with the
SCU (Server Configuration Utility) or the RemoteView or ServerView
programs.
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If there is only one CPU, this parameter has no effect; the CPU is
always used when the system is started. If all CPUs are installed
and set to Disabled, the first CPU is used. Even if only one of the
two possible CPUs is installed, the status indicators are displayed
for all possible CPUs.
Hyper Threading Technology
Defines whether the operating system can use all the logical processors
within a physical processor (Enabled) or only the first logical processor
(Disabled).
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The hyper-threading technology makes a single physical
processor appear as a number of logical processors. This
technology allows the operating system to make better use of the
internal processor resources. The advantages of this technology
can only be utilized by an operating system which supports hyper-
threading. This setting has no effect on operating systems that do
not support hyper-threading.
58 Operating Manual
BIOS Setup
BX620 S4