C-states – NEXCOM NISE 90 User Manual

Page 51

NISE 90 User Manual

Chapter 4: BIOS Setup

Execute Disable Bit
When this field is set to Disabled, it will force the XD feature flag to always
return to 0. XD can prevent certain classes of malicious buffer overflow
attacks when combined with a supporting OS (Windows Server 2003 SP1,
Windows XP SP2, SuSE Linux 9.2, RedHat Enterprise 3 Update 3).

Limit CPUID Maximum
The CPUID instruction of some newer CPUs will return a value greater
than 3. The default is Disabled because this problem does not exist in the
Windows series operating systems. If you are using an operating system
other than Windows, this problem may occur. To avoid this problem,
enable this field to limit the return value to 3 or lesser than 3.

Intel

Virtualization Technology

When enabled, a VMM can utilize the additional hardware capabilities
provided by vanderpool technology.

Advanced

→←: Select Screen
↑↓: Select Item
Enter: Select
+/-: Change Opt.
F1: General Help
F2: Previous Values
F3: Optimized Defaults
F4: Save & Exit
ESC: Exit

Enable or Disable C2 and above

CPU Configuration

Processor Type

EMT64

Processor Speed

System Bus Speed

Ratio Status

Actual Ratio

Processor Stepping

Microcode Revision

L1 Cache RAM

L2 Cache RAM

Processor Core

Hyper-Threading

Intel SpeedStep

Hyper-Threading

Execute Disable Bit

Limit CPUID Maximum

Intel Virtualization Technology

C-States

Enhanced C1

Enhanced C2

Enhanced C3

Enhanced C4

Genuine Intel(R) CPU

Supported

600 MHz

400 MHZ

20661

260

56 k

512 k

Single

Supported

[Enabled]

[Disabled]

[Enabled]

[Disabled]

[Enabled]

[Disabled]

[Enabled]

C-States

Disabled

Enabled

C-States

Enables or disables C2 and above.

Enhanced C1

Enables or disables Enhanced C1 state.

Enhanced C2

Enables or disables Enhanced C2 state.

Enhanced C3

Enables or disables Enhanced C3 state.

Enhanced C4

Enables or disables Enhanced C4 state.