Chapter 4 AMI BIOS Setup
Page: 4-12
EB-591LF USER
′
S MANUAL
BIOS Setting
Options
Description/Purpose
Microcode
Revision
No changeable options
Displays processor's microcode
update revision.
L1 Cache RAM
No changeable options
Displays amount of Level 1 cache.
L2 Cache RAM
No changeable options
Displays amount of Level 2 cache.
Processor
Cores
No changeable options
Displays information about number of
physical cores in processor.
Hyper-
Threading
No changeable options
Reports if Intel Hyper-Threading
Technology is supported by
processor.
Intel SpeedStep
-Disabled
-Enabled
Enables Intel SpeedStep feature for
dynamic scaling processor frequency.
Hyper-
threading
-Disabled
-Enabled
When disabled, only one thread per
active core will operate.
Execute
Disable Bit
-Disabled
-Enabled
Enables the NX bit (No eXecute)
security feature.
Limit CPUID
Maximum
-Disabled
-Enabled
Enables for legacy operating systems
to boot processors with extended
CPUID functions.
Intel
Virtualization
Technology
-Disabled
-Enabled
Enables or disables Intel
Virtualization Technology (VT-x).
Takes affect only after power cycling.
C-States
-Disabled
-Enabled
Enables or disables C states (C2 and
above) in processor.
Enhanced C1
-Disabled
-Enabled
Allows processor to enter its C1 idle
state.
Enhanced C2
-Disabled
-Enabled
Allows processor to enter its C2 idle
state.
Enhanced C3
-Disabled
-Enabled
Allows processor to enter its C3 idle
state.
Enhanced C4
-Disabled
-Enabled
Allows processor to enter its C4 idle
state.
