Processors sub menu
Select an item to display or set, and press Enter.
The following table shows description of menu items appeared in the left side
of the window.
Select an item to display or set, and press Enter. You can scroll the window
using the up arrow in red on the left top or the down arrow in red on the
bottom left if they are shown on the window.
Note: Keep the default value: Disable for C-States and C1 Enhanced Mode.
Do not change them.
Table 2-21 Processors menu items
Menu items
Selection
1
Description
Turbo Mode • Disable
• <<Enable>>
Sets a CPU Turbo Mode, which is
enabled after the reboot.
Shown only when supported by
installed CPUs.
Processor
Performance States
•
Disable
• <<Enable>>
Sets CPU EIST, which is enabled
after the reboot.
C-States • <<Disable>>
• Enable
Sets a CPU power saving mode,
which is enabled after the reboot.
Package ACPI C-
State Limit
• ACPI C2
Sets a C-State upper limit in the
CPU idle mode.
Not displayed when C-States is
disabled.
C1 Enhanced Mode • <<Disable>>
• Enable
Sets CPU Enhanced C1E State,
which is enabled after the reboot.
Hyper-Threading • Disable
• <<Enable>>
Sets CPU Hyper Threading.
Shown only when supported by
installed CPUs.
Execute Disable Bit • Disable
• <<Enable>>
With "Disable", the response is
always "0" for XD feature flag.
Intel Virtualization
Technology
• Disable
• <<Enable>>
Sets Vanderpool Technology, which
is Intel's new virtualization
technology.
Hardware Prefetcher • Disable
• <<Enable>>
Sets Hardware Prefetcher.
Adjacent Cache
Prefetch
• Disable
• <<Enable>>
Sets Adjacent Cache Prefetch.
DCU Streamer
Prefetcher
• Disable
• <<Enable>>
Sets DCU Streamer Prefetcher.
DCU IP Prefetcher • Disable Sets DCU IP Prefetcher.
2-24
UEFI setup menu
Hitachi Compute Blade 500 Series EFI User's Guide
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