19
3.2.2
Advanced
BIOS
Features
Setup
Select
the
Advanced
tab
from
the
DS
‐
561
setup
screen
to
enter
the
Advanced
BIOS
Setup
screen.
You
can
select
any
of
the
items
in
the
left
frame
of
the
screen,
such
as
CPU
configuration,
to
go
to
the
sub
menu
for
that
item.
You
can
display
an
Advanced
BIOS
Setup
option
by
highlighting
it
using
the
<Arrow>
keys.
All
Advanced
BIOS
Setup
options
are
described
in
this
section.
The
Advanced
BIOS
Setup
screens
are
shown
below.
The
sub
menus
are
described
on
the
following
pages.
Figure.
20
Advanced
BIOS
Features
Setup
Screen
ACPI Settings:
This
section
allows
you
to
control
hardware
monitoring
and
power
management
CPU Configuration:
Hyper
‐
threading:
Enabled
for
Windows
XP
and
Linux
(OS
optimized
for
Hyper
‐
Threading
Technology)
and
Disabled
for
other
OS
(OS
not
optimized
for
Hyper
‐
Threading
Technology).
When
disabled,
only
one
thread
per
enabled
‐
core
is
enabled.
Active
Processor
Cores:
Number
of
cores
to
be
enabled
in
each
processor
package.
Limit
CPUID
Maximum:
Disabled
for
Windows
XP.
Execute Disable Bit:
It
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.).
Intel
Virtualization
Technology:
When
enabled,
a
VMM
can
utilize
the
additional
hardware
capabilities
provided
by
Vander
pool
Technology.
Hardware
Prefetcher:
To
turn
on/off
the
Mid
Level
Cache
(L2)
streamer
prefetcher.
Adjacent
Cache
Line
Prefetch:
To
turn
on/off
prefetching
of
adjacent
cache
lines
