User’s Manual

3-5
Chapter 3: BIOS setup
SA - PCI Express options
DMI Link ASPM Control [Disabled]
This item allows you to control the Active State Power Management on both
CPU and PCH (platform controller hub) Both DMI link ASPM control items of the
CPU and PCH sides must be enabled for the ASPM to take effect. Conguration
options: [Disabled] [L1]
PEG-ASPM [Disabled]
This item allows you to select the ASPM state for energy-saving conditions, or use
the ASUS optimized energy saving prole. Conguration options: [Disabled] [Auto]
[ASPM L0s] [ASPM L1] [ASPM L0sL1]
3.3.2 CPU Configuration
The items in this menu show CPU-related information the BIOS automatically
detects.
The items shown in the submenu may be different depending on the type of
CPU installed.
Hyper-threading [Enabled]
The Intel Hyper-Threading Technology allows a hyper-threading processor to
appear as two logical processors to the operating system, allowing the operating
system to schedule two threads or processes simultaneously.
[Enabled] Two threads per activated core are enabled.
[Disabled] Only one thread per activated core is enabled.
Active Processor Cores [All]
This item allows you to select the number of CPU cores to activate in each
processor package. Conguration options: [All] [1] [2] [3] [4] [5]
For some CPU types, only [All] and [1] appear.
Intel Virtualization Technology [Disabled]
When set to [Enabled], a VMM can utilize the additional hardware capabilities
provided by Vanderpool Technology. Conguration options: [Disabled] [Enabled]
Hardware Prefetcher [Enabled]
This item allows you to turn on/off the MLC streamer prefetcher. Conguration
options: [Disabled] [Enabled]
Adjacent Cache Line Prefetcher [Enabled]
This item allows you to turn on/off prefetching adjacent cache lines. Conguration
options: [Disabled] [Enabled]