Zotac H55 series User manual

1
Federal Communications Commission (FCC) Statement
This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to Part 15 of FCC Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This equipment generates, uses and
can radiate radio frequency energy and, if not installed and used in accordance with instructions
contained in this manual, may cause harmful interference to radio and television communications.
However, there is no guarantee that interference will not occur in a particular installation.
If this equipment does cause harmful interference to radio or television reception, which can
be determined by turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
- REORIENT OR RELOCATE THE RECEIVING ANTENNA
- INCREASE THE SEPARATION BETWEEN THE EQUIPMENT AND THE RECEIVER
- CONNECT THE EQUIPMENT INTO AN OUTLET ON A CIRCUIT DIFFERENT FROM
THAT OF THE RECEIVER
- CONSULT THE DEALER OR AN EXPERIENCED AUDIO/TELEVISION TECHNICIAN
NOTE:
Connecting this device to peripheral devices that do not comply with Class B requirements, or
using an unshielded peripheral data cable, could also result in harmful interference to radio or
television reception.
The user is cautioned that any changes or modications not expressly approved by the party
responsible for compliance could void the user’s authority to operate this equipment.
To ensure that the use of this product does not contribute to interference, it is necessary to use
shielded I/O cables.
Copyright
This manual is copyrighted with all rights reserved. No portion of this manual may be copied or
reproduced by any means.
While every precaution has been taken in the preparation of this manual, no responsibility for
errors or omissions is assumed. Neither is any liability assumed for damages resulting from the
use of the information contained herein.
Trademarks
All brand names, logos and registered trademarks mentioned are property of their respective
owners.
Electronic Emission Notices
WARNING!

2
Intel H55 series Motherboard
Table of Contents
Motherboard Specications ------------------------------------------------------------------- 4
Motherboard Layout------------------------------------------------------------------------------ 6
Hardware Installation ---------------------------------------------------------------------------- 8
Safety Instructions ----------------------------------------------------------------------------- 8
Preparing the Motherboard ------------------------------------------------------------------ 9
Installing the CPU ------------------------------------------------------------------------- 9
Installing the CPU Fan ------------------------------------------------------------------- 10
Installing Memory DIMMs --------------------------------------------------------------- 10
Installing the Motherboard ------------------------------------------------------------------- 11
Installing the I/O Shield ------------------------------------------------------------------ 11
Securing the Motherboard into the Chassis ---------------------------------------- 11
Connecting Cables and Setting Switches------------------------------------------------ 12
24-pin ATX Power Connector ---------------------------------------------------------- 13
4-pin ATX_12V Power Connector ----------------------------------------------------- 13
SPDIF-Out Header (optional) ---------------------------------------------------------- 14
COM Header (optional) ------------------------------------------------------------------ 14
Front Panel Header----------------------------------------------------------------------- 14
USB Headers------------------------------------------------------------------------------- 15
Front Pannel Audio Header ------------------------------------------------------------- 15
Speaker Header --------------------------------------------------------------------------- 16
Serial-ATA (SATA) Connectors--------------------------------------------------------- 16
Fan Connectors---------------------------------------------------------------------------- 16
Expansion Slots---------------------------------------------------------------------------- 17
Jumper Settings --------------------------------------------------------------------------- 17
Conguring the BIOS ---------------------------------------------------------------------------- 18
Enter BIOS Setup ------------------------------------------------------------------------------ 18
Main Menu --------------------------------------------------------------------------------------- 18
Advanced Menu -------------------------------------------------------------------------------- 19
PC Health Monitor------------------------------------------------------------------------- 19
USB Conguration ------------------------------------------------------------------------ 19
CPU Conguration ------------------------------------------------------------------------ 19
IDE Conguration ------------------------------------------------------------------------- 20
AHCI Conguration ----------------------------------------------------------------------- 20
Intel TXT(LT) Conguration ------------------------------------------------------------- 21
Intel VT-d Conguration------------------------------------------------------------------ 21
ACPI Conguration ----------------------------------------------------------------------- 21
PCIPnP -------------------------------------------------------------------------------------- 21

3
Table of Contents
Security -------------------------------------------------------------------------------------- 21
Boot Menu --------------------------------------------------------------------------------------- 22
Boot Setting Conguration -------------------------------------------------------------- 22
Chipset Menu ----------------------------------------------------------------------------------- 23
North Bridge Conguration-------------------------------------------------------------- 23
South Bridge Conguration ------------------------------------------------------------- 23
Perform Setting Menu------------------------------------------------------------------------- 23
Exit Menu ---------------------------------------------------------------------------------------- 24
Save Changes and Exit------------------------------------------------------------------ 24
Discard Changes and Exit -------------------------------------------------------------- 24
Discard Changes -------------------------------------------------------------------------- 24
Load Optimal Defaults ------------------------------------------------------------------- 24
Load Failsafe Defaults ------------------------------------------------------------------- 24
Flash Update Procedure -------------------------------------------------------------------- 25
Installing Drivers and Software -------------------------------------------------------------- 26
Driver Installation ------------------------------------------------------------------------------ 26
Realtek HD Audio Driver Setup ------------------------------------------------------------ 33
Getting Started ----------------------------------------------------------------------------- 33
Sound Effect -------------------------------------------------------------------------------- 33
Mixer------------------------------------------------------------------------------------------ 35
Audio I/O------------------------------------------------------------------------------------- 37
Microphone --------------------------------------------------------------------------------- 41
3D Audio Demo ---------------------------------------------------------------------------- 42
Information --------------------------------------------------------------------------------- 42

4
Intel H55 series Motherboard
Motherboard Specications
qChipset
v Intel® H55 Express Chipset
qSize
v Micro ATX form factor of 244 mm x 170 mm
qMicroprocessor support
v Supports LGA 1156 socket for Intel®CoreTM i3/CoreTM i5/CoreTM i7 (8xx series)
processors
qOperating systems
v Supports Windows XP 32bit/64bit, Windows Vista 32bit/64bit and Windows 7
32bit/64bit
qSystem Memory
v Supports dual-channel (128 bits wide) DDRIII memory interface
v Supports DDRIII 1333/1066
v Maximum memory size: 8 GB
q USB 2.0 ports
v Supports hot plug and play
v Twelve USB 2.0 ports (six on the back panel, six via the USB brackets
connected to the internal USB headers)
v Supports USB 2.0 protocol up to 480 Mbps transmission rate
qOnboard Serial ATA ports
v Independent DMA operation on ve ports (optional)
v Data transfer rates of 3.0 Gb/s
qeSATA Port
v One eSATA port on backpanel
v Supports hot plug and play
v Provide a link for 3.0 Gb/s data speed
qOnboard Lan (RTL8111 series)
v PCI Express base specication 1.0a compliant
v Compliant to 802.3x ow control support
v 10/100/1000 IEEE 802.3 compliant
v Wake On LAN (WOL) power management support

5
Motherboard Specications
qAudio
v 6/8 channel High Denition Audio Codec (optional)
v All DACs support 192k/96k/48k/44.1kHz sample rate
v One SPDIF-out header on board (optional)
qGreen Function
v Support SMM, APM, ACPI
v Suspend to DRAM supported (STR)
v RTC timer to power-on the system
v AC power failure recovery
qOnboard Graphics Features
v DX10 and OpenGL 2.0 are supported
v 3D Graphics Rendering Enhancements
v Up to 2048x1536@75 Hz refresh
v HDMI/DVI/VGA port output support (DVI-VGA adaptor bundled in some model)
qPCI Express Interface
v Supports PCI Express 2.0
v Provide 16 GB/s bandwidth for platform graphics
v Wake up function is supported
v Clock spread spectrum capability
qExpansion slots
v One PCI express x16 slot
v Two PCI express x1 slots
v One PCI slot

6
Intel H55 series Motherboard
120 240
121
120 240
121
1.5V 1.5V
115XLM
LG A1156
REMOVE
LOTES
1
7
SYSFAN2
PCI1
8
SATA2
SATA4
9
15
16 17
Chipset
18 19 20
DDRIII1
DDRIII2
U_KB1
DVI
ESATA
USB
CN4
PW1
FP1 SPK1
FP_S1
SPDIF
PW2
FP_U1
SATA5 SATA1 SATA3
3
4
5
6
HDMI
FP_U3 FP_U2
PCIE2
PCIE3
PCIE1
10
11
12 JP1
CN6
SYSFAN1
13
14
SD1
2
CPUFAN1
LAN1
USB
VGA
Motherboard Layout
Figure 1 shows the motherboard and Figure 2 shows the back panel connectors.
Figure 1. Board Layout
1. 24-pinATX Power Connector-PW1
2. Chipset
3. Speaker Header-SPK1
4. Front Panel Header-FP1
5. Serial-ATA (SATA) Connectors(SATA1~5)
6. USB Headers (FP_U1~FP_U3)
7. SPDIF-Out Header-CN6 (optional)
8. COM Header_CN4 (optional)
9. PCI Slot-PCI1
10. PCI Express x1 Slots-PCIE2~3
11. Front Pannel Audio Header-FP_S1
12. Clear CMOS Jumper-JP1
13. SYS Fan Connector-SYSFAN1
14. PCI Express x16 Slot-PCIE1
15. Backpanel Connectors
16. 4-pinATX_12V Power Connector-PW2
17. CPU Socket
18. SYS Fan Connector-SYSFAN2
19. CPU Fan Connector_CPUFAN1
20. DDRIII DIMM Sockets-DDRIII1~2
Figure 1

7
Rear panel
6
11
5
10
15
8
9
23456
27
Figure 2. Backpanel connectors
1. PS/2 Keyboard Port
3. HDMI Port (optional)
5. DVI Port
2. USB Connectors
4. SPDIF Connectors (optional)
6. eSATA Port
8. LAN Connector
Lan Port with LEDs to indicate status.
· Yellow/Light Up/Blink = 10 Mbps/Link/Activity
· Yellow and Green/Light Up/Blink = 100 Mbps/link/Activity
· Yellow and Orange/Light Up/Blink = 1000 Mbps/link/Activity
9. VGA Port
7. Port 2-Channel 4-Channel 6-Channel
Blue Line-In Rear Speaker Out Rear Speaker Out
Green Line-Out Front Speaker Out Front Speaker Out
Pink Mic In Mic In Center/Subwoofer
6
11
5
10
15
10
10.
Port 2-Channel 4-Channel 6-Channel 8-Channel
Blue Line-In Line-In Line-In Line-In
Green Line-Out Front Speaker Out Front Speaker Out Front Speaker Out
Pink Mic In Mic In Mic In Mic In
Orange -- -- Center/Subwoofer Center/Subwoofer
Black -- Rear Speaker Out Rear Speaker Out Rear Speaker Out
Grey -- -- -- Side Speaker Out

8
Intel H55 series Motherboard
Hardware Installation
This section will guide you through the installation of the motherboard. The topics
covered in this section are:
q Preparing the motherboard
v Installing the CPU
v Installing the CPU fan
v Installing Memory DIMMs
qInstalling the motherboard
v Installing the I/O shield
v Securing the Motherboard into the Chassis
qConnecting cables and setting switches
Safety Instructions
To reduce the risk of re, electric shock, and injury, always follow basic safety precau-
tions.
Remember to remove power from your computer by disconnecting the AC main
source before removing or installing any equipment from/to the computer chassis.

9
Hardware Installation
Preparing the Motherboard
The motherboard shipped in the box does not contain a CPU or memory DIMM. You
need to purchase them to complete this installation.
Installing the CPU
Be very careful when handling the CPU. Make sure not to bend or break any pins on
the back. Hold the processor only by the edges and do not touch the bottom of the
processor.
The following illustration shows CPU installtaion components
1. Unhook the socket lever by pushing down and away
from the socket.
2. Lift the socket lever and the load plate to fully open
position.
3. Use your thumb and forenger to lift the cap up
vertically.
● Be careful not to touch the socket contacts.
4. Hold the processor with your thumb and forenger.
Insert the processor into the socket vertically.
● Align the CPU pin 1 mark with the pin 1 corner of
the CPU socket.
5. Make sure the CPU is fully seated, and then replace
the load plate.
● Be sure that the front end of the load plate is
under the shoulder screw.
6. Secure the load lever to its locked location.

10
Intel H55 series Motherboard
Installing the CPU Fan
There are many different fan types that can be used with this motherboard. Follow the
instruction that came with your fan assembly. Be sure that the fan orientation is correct
for your chassis type and your fan assembly.
Installing Memory DIMMs
Your new motherboard has two 1.5V 240-pin slots for DDR3 memory. These slots
support 1 GB/2 GB/4 GB DDR3 technologies. They also support dual channel DDR3
memory technology up to 10.7 GB/s. There must be at least one memory bank popu-
lated to ensure normal operation. Refer to the following recommendations to install
memory DIMMs.
q One DIMM: Install it into slot 1 or 2. You can install the DIMM into any slot,
however, slot 1 is preferred.
q Two DIMMs: Install them into slot 1 and slot 2.
Refer to the following procedure to install memory DIMMs into the slots on the
motherboard. Note that there is only one gap near the center of the DIMM slot. This
slot matches the slot on the memory DIMM to ensure the component is installed
properly.
1. Unlock a DIMM slot by pressing the module clips outward.
2. Align the memory module to the DIMM slot, and insert the module vertically into
the DIMM slot. The plastic clips at both sides of the DIMM slot automatically lock
the DIMM into the connector.
120 240
121
120 240
121
1.5V 1.5V
115XLM
LGA 1156
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DDRIII2
DDRIII1

11
Hardware Installation
Installing the Motherboard
The sequence of installing the motherboard into the chassis depends on the chassis
you are using and if you are replacing an existing motherboard or working with an
empty chassis. Determine if it would be easier to make all the connections prior to this
step or to secure the motherboard and then make all the connections. It is normally
easier to secure the motherboard rst.
Use the following procedure to install the I/O shield and secure the motherboard into
the chassis.
Note: Be sure that the CPU fan assembly has enough clearance for the chassis
covers to lock into place and for the expansion cards. Also make sure the
CPU Fan assembly is aligned with the vents on the covers.
Installing the I/O Shield
The motherboard kit comes with an I/O shield that is used to block radio frequency
transmissions, protects internal components from dust and foreign objects, and pro-
motes correct airow within the chassis.
Before installing the motherboard, install the I/O shield from the inside of the chassis.
Press the I/O shield into place and make sure it ts securely. If the I/O shield does not
t into the chassis, you would need to obtain the proper size from the chassis supplier.
Securing the Motherboard into the Chassis
Most computer chassis have a base with mounting studs or spacers to allow the
motherboard to be secured to the chassis and help to prevent short circuits. If there are
studs that do not align with a mounting hole on the motherboard, it is recommended
that you remove that stud to prevent the possibility of a short circuit. In most cases, it
is recommended to secure the motherboard with spacers.
1. Carefully place the motherboard onto the studs/spacers located inside the chassis.
2. Align the mounting holes with the studs/spacers.
3. Align the connectors to the I/O shield.
4. Ensure that the fan assembly is aligned with the chassis vents according to the fan
assembly instruction.
5. Secure the motherboard with screws.

12
Intel H55 series Motherboard
Connecting Cables and Setting Switches
This section takes you through all the connectors and switch settings necessary on
the motherboard. This will include:
q Power Connectors
v 24-pin ATX Power Connector-PW1
v 4-pin ATX_12V Power Connector-PW2
q Internal Headers/Connectors
v SPDIF-Out Header-CN6 (optional)
v COM Header-CN4 (optional)
v Front Panel Header-FP1
v USB Header (FP_U1~FP_U2)
v Front Pannel Audio Header-FP_S1
v Speaker Header-SPK1
q Serial-ATA (SATA) Connectors (SATA1~6)
q Fan Connectors
q Expansion Slots
q CMOS Jumper Settings
See Figure 1 to locate the connectors and jumpers referenced in the following
procedure.

13
Hardware Installation
24-pin ATX Power Connector-PW1
PW1 is the main power supply connector. Make sure that the power supply cable
and pins are properly aligned with the connector on the motherboard. Firmly plug the
power supply cable into the connector and make sure it is secure.
PW1-Pin Denition
Pin Signal Pin Signal
1 +3.3V 13 +3.3V
2 +3.3V 14 -12V
3 GND 15 GND
4 +5V 16 PS_ON
5 GND 17 GND
6 +5V 18 GND
7 GND 19 GND
8 PWROK 20 -5V
9 +5V_AUX 21 +5V
10 +12V 22 +5V
11 +12V 23 +5V
12 +3.3V 24 GND
4-pin ATX_12V Power Connector-PW2
PW2, the 4-pin ATX 12V power connector, is used to provide power to the CPU. Align
the pins to the connector and press rmly until seated.
PW2-Pin Denition
Pin Signal
1 GND
2 GND
3 +12V
4 +12V
120 240
121
120 240
121
1.5V 1.5V
115XLM
LGA 1156
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1PW2
PW1
1
12
13
24

14
Intel H55 series Motherboard
SPDIF-Out Header-CN6 (optional)
This header provides a SPDIF (Sony/Philips Digital Interface) output to digital multimedia
device through coaxial connector. CN6 - Pin Denition
Pin Signal
1 GND
2 SPDIF-out
3 VCC
q PWRLED
Attach the front panel power LED cable to these two pins of the connector. The Power LED
indicates the system’s status.
q PWR SW
Attach the power button cable from the case to these two pins. Pressing the power button
on the front panel turns the system on and off rather than using the power supply button.
q HDD LED
Attach the hard disk drive indicator LED cable to these two pins. The HDD indicator LED
indicates the activity status of the hard disks.
q RST SW
Attach the Reset switch cable from the front panel of the case to these two pins. The system
restarts when the RESET switch is pressed.
Note: Some chassis do not have all four cables. Be sure to match the name on the
connectors to the corresponding pins.
Front Panel Header-FP1
The front panel header on this motherboard
is one connector used to connect the
following four cables :
CN6
1
120 240
121
120 240
121
1.5V 1.5V
115XLM
LGA11 56
REMOVE
LOTES
FP1
CN4
1
COM Header-CN4 (optional)
CN4 - Pin Denition
Pin Signal Pin Signal
1 DCD 2 RXD
3 TXD 4 DTR
5 GND 6 DSR
7 RTS 8 CTS
9 RI 10 NC
FP1-Pin Denition
Pin Signal Pin Signal
1 HDD_LED+ 2 PW_LED+
3 HDD_LED- 4 PW_LED-
5 GND 6 PWR_SW
7 RESET 8 GND
9 NC 10 KEY

15
Hardware Installation
USB Headers-FP_U1~FP_U3
This motherboard contains six USB 2.0 ports that are exposed on the rear panel of
the chassis. The motherboard also contains three 10-pin internal headers connector
onboard.
Note: Secure the bracket to either the front or rear panel of your chassis (not all
chassis are equipped with the front panel option).
Front Panel Audio Header-FP_S1
The audio connector supports HD audio standard
and provides two kinds of audio output choices:
the Front Audio, the Rear Audio. The front Audio
supports retasking function.
Note:
In order to utilize the front audio header, your chassis must have front audio
connector. Also please make sure the pin assignment on the cable is the same
as the pin assignment on the mainboard header. To nd out if the chassis you
are buying supports a front audio connector, please contact your dealer.
FP_U1~FP_U3-Pin Denition
PIN Assignment PIN Assignment
1 VCC 2 VCC
3 USBP0- 4 USBP1-
5 USBP0+ 6 USBP1+
7 GND 8 GND
9 KEY 10 NC
FP_S1-Pin Denition
PIN Assignment PIN Assignment
1 MIC2(L) 2 GND
3 MIC(R) 4 -ACZ-DET
5 Front Audio(R) 6 Reserved
7 FAVDIO-JD 8 Key(No pin)
9 Front Audio(L) 10 Reserved
120 240
121
120 240
121
1.5V 1.5V
115XLM
LGA 1156
REMOVE
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1FP_S1
1
FP_U1
1
FP_U2
FP_U3
1

16
Intel H55 series Motherboard
Speaker Header-SPK1
Serial-ATA (SATA) Connectors (SATA1~5)
The Serial ATA connector is used to connect the Serial
ATA device to the motherboard. These connectors
support the thin Serial ATA cables for primary storage
devices. The current Serial ATA interface allows up to
300 MB/s data transfer rate. There are six serial ATA
connectors on the motherboard that support AHCI
conguration.
SPK1-Pin Denition
PIN Assignment
1 VCC
2 NC
3 NC
4 SPK-
SATA-Pin Denition
Pin Signal
1 GND
2 TXP
3 TXN
4 GND
5 RXN
6 RXP
7 GND
Fan Connectors
There are three fan connectors on the motherboard,
including system fan connectors-SYSFAN1 and
SYSFAN2, CPU fan connector-CPUFAN1.
SPK1
1
120 240
121
120 240
121
1.5V 1.5V
115XLM
LGA 1156
REMOVE
LOTES
CPUFAN1
SYSFAN1
GND
+12V
Sense
Control
GND
+12V
Sense
Control
SYSFAN2
GND
+12V
Sense
Control
SATA2
SATA4
SATA5 SATA3
SATA1

17
Hardware Installation
PCIE x16 Slot-PCIE1
There is one PCIE x16 slot reserved for graphics or video cards. The bandwidth of the PCIE x16
slot is up to 16 GB/s complianting with PCIE 2.0 specication.
PCIE x1 Slots-PCIE2~3
There are two PCI Express x1 slots that are designed to accommodate less bandwidth intensive
cards, such as a modem or LAN card.
PCI Slot-PCI1
The one PCI slot supports many expansion cards such as a LAN card, USB card, SCSI card and
other cards that comply with PCI specications.
Jumper Settings
This section explains how to congure the motherboard’s hardware. Before using
your computer, make sure all jumpers and DRAM modules are set correctly. Refer to
this section whenever in doubt.
CMOS Clear Jumper-JP1
Close Open * = Default setting.
If you want to clear the system conguration, use the JP1 (Clear CMOS Jumper) to clear data.
Notice:
1. Be sure to save the CMOS setting when exit the CMOS.
2. If the CPU is frequency multiplier locked, no CPU speed change will be seen
even if the frequency multiplier setting in CMOS setup is changed.
JP1 Selection
1-2* Normal*
2-3 CMOS Clear
1
1
Expansion Slots
The motherboard contains four expansion slots, including one PCIE x16 slot, two
PCIE x1 slots and one PCI slot.
120 240
121
120 240
121
1.5V 1.5V
115XLM
LGA11 56
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LOTES
PCIE1
PCIE3
PCIE2
PCI1

18
Intel H55 series Motherboard
Conguring the BIOS
This section discusses how to change the system settings through the BIOS Setup
menus. Detailed descriptions of the BIOS parameters are also provided.
Enter BIOS Setup
The BIOS is the communication bridge between hardware and software. Correctly
setting the BIOS parameters is critical to maintain optimal system performance.
Refer to the following procedure to verify/change BIOS settings.
1. Power on the computer.,
2. Press the Del key when the following message briey displays at the bottom of
the screen during the Power On Self Test (POST).
Pressing Del takes you to the BIOS Setup Utility.
Note: 1. We reserve the right to update the BIOS version presented in the
manual. The BIOS pictures shown in this section are for reference only.
2. It is strongly recommended that you do not change the default BIOS
settings. Changing some settings could damage your system.
Main Menu
Note: Users please note that the
data in gray is non-changeable,
and the others are for selection.
This menu gives you an overview of the general system specications. The BIOS
automatically detects the items in this menu.
q AMI BIOS
Displays the auto-detected BIOS information.
q Processor
Displays the auto-detected CPU specication.
q System Memory
Displays the auto-detected system memory.
q System time
Allows you to set the system time.

19
Conguring the BIOS
Advanced Menu
The Advanced menu items allow you to change the setting for the CPU and other
system devices. Press <enter> to display the conguration options:
PC Health Monitor
Use this menu to monitor the real-time system status of your PC. Press <enter>to
display the conguration options:
q CPUFAN Mode Setting
Use this item to set the CPU FAN mode.
USB Conguration
The items in this menu allow you to change the USB-related features .Press <enter>
To display the conguration options:
q Legacy USB Support
Allows you to enable or disable support for USB devices on legacy operating
systems.
q USB 2.0 Controller Mode
Allows you to congure the USB 2.0 controller in HiSpeed or Full Speed.
q BIOS EHCI Hand-Off
Allows you to enable support for operating systems without an EHCI hand-off
feature.
q Legacy USB1.1 HC Support
Allows you to enable or disable Legacy USB1.1 HC support.
CPU Conguration
The items in this menu show the CPU-related information that the BIOS automatically
detects. Press <enter>to display the conguration options:
q Ratio CMOS Setting
Use this option to set CMOS ratio.
q Hardware Prefetcher
Use this item to enable or disable hardware prefetcher (hardware prefetch
mechanism).
q Adjacent Cache Line Prefetch
Use this item to enable or disable the adjacent cache line prefetch mode. If you
disable this item, only one 64-bit line will be prefetched from the 128-bit section
(including the required data). If you enable this item, two lines will be prefetched
whether there is required data or not.