Lenovo ThinkSystem SD530 Manual page 36

Table 11. Processors details (continued)
C1 Enhanced Mode
Hyper-Threading
Execute Disable Bit
Trusted Execution Technology
Intel Virtualization Technology
Hardware Prefetcher
Adjacent Cache Prefetch
DCU Streamer Prefetcher
DCU IP Prefetcher
DCA
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ThinkSystem Server with Intel Xeon SP (1st, 2nd Gen) UEFI Manual
Enabling C1E (C1 enhanced) state can save power by
• Enable
halting CPU cores that are idle. An operating system that
• Disable
supports C1E state must be installed to take advantage of
this feature. Changing this setting takes effect after the
next reboot. When a preset mode is selected, the low-
level settings are not changeable and will be grayed out. If
user would like to change the settings, please choose
[Custom Mode] in "Operating Mode" and [Legacy]/
[Disable] in "C-States" located under "System Setting"
submenu.
Enable is the default setting.
Note: C1E can only be changeable when C-state is not
"Autonomous"
Enable Hyper Threading (Software Method to Enable/
• Enable
Disable Logical Processor threads).
• Disable
Enable is the default setting.
Notes:
• Changing this setting will require a Power Good reset
• If CPU doesn't support the feature, it won't show.
The execute disable bit allows memory to be marked as
• Enable
executable or non-executable when used with a
• Disable
supporting operating system. This can improve system
security by configuring the processor to raise an error to
the operating system when code attempts to run in non-
executable memory.
Enable is the default setting.
Enable Intel Trusted Execution Technology (Intel TXT).
• Enable
Disable is the default setting.
• Disable
Enable the Virtualization Technology. Enable is the
• Enable
default setting.
• Disable
Lightly threaded applications and some benchmarks can
• Enable
benefit from having the hardware prefetcher enabled.
• Disable
Enable is the default setting.
Lightly threaded applications and some benchmarks can
• Enable
benefit from having the adjacent cache line prefetch
• Disable
enabled. Enable is the default setting.
Lightly threaded applications and some benchmarks can
• Enable
benefit from having the DCU streamer prefetcher enabled.
• Disable
Enable is the default setting.
DCU IP prefetcher is typically best left enabled for most
• Enable
environments. Enable is the default setting.
• Disable
DCA capable I/O devices such as network controllers can
• Enable
place data directly into the CPU cache, which improves
• Disable
response times. Enable is the default setting.
to take effect.