Siemens SIMATIC IPC627D Operating Manual page 33

"Advanced CPU Control" submenu
Parameter
AESNI Feature
AES
P-States (IST)
Active Processor Cores
HT Support
Execute Disable Bit
Use XD Capability
BIOS Description
Operating Manual, 05/2016, A5E33664825-AB
Meaning
Enables (Enabled) the Advanced AES Instruction Set of modern
CPUs. You can disable this feature (Disabled) to remain compatible
with older CPUs or if errors occur.
When activated (Enabled), the secure encryption method AES
1
(Advanced Encryption Standard) is supported by hardware, which
speeds up encryption and decryption.
Enable the performance modes of the processor (Enabled) or lock
them (Disabled).
All Cores
1 Core
2 Cores
3 Cores
If possible, use hyperthreading (Auto) or deactivate it fully (Disabled).
With Hyper Threading Technology, multiple logical processors are
presented to the operating system instead of a single physical
processor. This allows the operating system to better distribute tasks
and increase the overall processor performance.
The operating system must support ACPI. "HT Support" with operating
systems that provide no ACPI support.
When activated (Enabled), the operating system can prevent the
3
execution of programs in specific areas of memory for virus protection.
2
The operating system must support the "eXecute Disable-Bit (XD-Bit)"
feature.
If the entry is not activated (Disabled), the operating system is unable
to activate the XD bit function.
All cores of the processor are active and used.
Number of processor cores used (provided they do not
exceed the actual number of cores). The remaining are
inactive and are hidden from the operating system.
This can resolve certain problems with software.
BIOS Setup (SCU)
3.6 Power menu
33