ECS P45T-AD3 User Manual
Preface
Copyright
This publication, including all photographs, illustrations and software, is protected
under international copyright laws, with all rights reserved. Neither this manual, nor
any of the material contained herein, may be reproduced without written consent of
the author.
Version 1.0
Disclaimer
The information in this document is subject to change without notice. The manufacturer makes no representations or warranties with respect to the contents hereof and
specifically disclaims any implied warranties of merchantability or fitness for any
particular purpose. The manufacturer reserves the right to revise this publication and
to make changes from time to time in the content hereof without obligation of the
manufacturer to notify any person of such revision or changes.
Trademark Recognition
Microsoft, MS-DOS and Windows are registered trademarks of Microsoft Corp.
MMX, Pentium, Pentium-II, Pentium-III, Celeron are registered trademarks of Intel
Corporation.
Other product names used in this manual are the properties of their respective
owners and are acknowledged.
Federal Communications Commission (FCC)
This equipment has been tested and found to comply with the limits for a Class B
digital device, pursuant to Part 15 of the 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 the instructions, may cause harmful interference to radio 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 onto an outlet on a circuit different from that to
which the receiver is connected
• Consult the dealer or an experienced radio/TV technician for help
Shielded interconnect cables and a shielded AC power cable must be employed with
this equipment to ensure compliance with the pertinent RF emission limits governing this device. Changes or modifications not expressly approved by the system’s
manufacturer could void the user’s authority to operate the equipment.
Preface
ii
Declaration of Conformity
This device complies with part 15 of the FCC rules. Operation is subject to the
following conditions:
• This device may not cause harmful interference, and
• This device must accept any interference received, including interference that may cause undesired operation
Canadian Department of Communications
This class B digital apparatus meets all requirements of the Canadian Interferencecausing Equipment Regulations.
Cet appareil numérique de la classe B respecte toutes les exigences du Réglement sur
le matériel brouilieur du Canada.
About the Manual
The manual consists of the following:
Chapter 1
Introducing the Motherboard
Chapter 2
Installing the Motherboard
Chapter 3
Using BIOS
Chapter 4
Using the Motherboard Software
Chapter 5
ATI CrossfireXTM T echnology Support
Chapter 6
®
Intel
Matrix Storage Manager
RAID Configurations
Preface
Describes features of the
motherboard.
Go to
Describes installation of
motherboard components.
Go to
Provides information on using the BIOS Setup Utility.
Go to
Describes the motherboard
software
Go to
Describes the ATI
CrossfireX
Go to
Describes the Intel
Storage Manager RAID Configurations
Go to
page 1
H
page 7
H
page 25
H
page 43
H
TM
Technology
page 49
H
page 53
H
®
Matrix
TT
ABLE OF CONTENTSABLE OF CONTENTS
T
ABLE OF CONTENTS
TT
ABLE OF CONTENTSABLE OF CONTENTS
Preface i
iii
Chapter 1
Introducing the Motherboard 1
Introduction......................................................................................1
Feature ..............................................................................................2
Specifications...................................................................................4
Motherboard Components.............................................................5
Chapter 2
Installing the Motherboard 7
Safety Precautions...........................................................................7
Choosing a Computer Case............................................................7
Installing the Motherboard in a Case...........................................7
Checking Jumper Settings..............................................................8
Setting Jumpers........................................................................8
Checking Jumper Settings........................................................9
Jumper Settings........................................................................9
Installing Hardware..................................................................10
Installing the Processor..........................................................10
Installing Memory Modules....................................................12
Expansion Slots......................................................................15
Connecting Optional Devices.................................................17
Installing a Hard Disk Drive/CD-ROM/SATA Hard Drive....19
Installing a Floppy Diskette Drive.........................................20
Connecting I/O Devices................................................................21
Connecting Case Components....................................................22
Front Panel Header................................................................24
1
7 7
7
7 7
Chapter 3 25
Using BIOS 25
About the Setup Utility ................................................................ 25
The Standard Configuration...................................................25
Entering the Setup Utility........................................................25
Using BIOS.....................................................................................26
Standard CMOS Setup...........................................................27
Advanced Setup......................................................................29
Advanced Chipset Setup.........................................................32
iv
Integrated Peripherals.......................................................33
Power Management Setup.................................................34
PCI/PnP Configuration......................................................35
PC Health Status................................................................36
M.I.B. (MB Intelligent BIOS).............................................38
Load Default Settings.......................................................40
Supervisor Password........................................................40
User Password..................................................................41
Save & Exit Setup...............................................................41
Exit Without Saving............................................................41
Updating the BIOS.............................................................42
Chapter 4
43 43
43
43 43
Using the Motherboard Software 43
About the Software CD-ROM......................................................43
Auto-installing under W indows XP/Vista..................................43
Running Setup....................................................................44
Manual Installation........................................................................48
Utility Software Reference............................................................48
Chapter 5
49 49
49
49 49
A TI CrossFireX™ T echnology Support 49
Requirements..................................................................................49
Installing a single graphics card..................................................49
Installing CrossFireX™ graphics cards.......................................50
The Catalyst™ Control Center Dialog Box..................................52
View....................................................................................52
To Enable CrossFireX
Chapter 6
™
......................................................52
53 53
53
53 53
Intel® Matrix Storage Manager RAID Configurations 53
Before creating a RAID set...........................................................53
Entering Intel® Matrix Storage Manager RAID BIOS utility...54
Creating a RAID set.......................................................................55
Deleting a RAID set.......................................................................57
Resetting disks to Non-RAID......................................................58
Exiting Setup...................................................................................58
Chapter 1
Introducing the Motherboard
Introduction
Thank you for choosing the P45T-AD3 motherboard. This motherboard is a high
performance, enhanced function motherboard designed to support the LGA775 socket
®
Intel
Yorkfield/Wolfdale/CoreTM 2 Extreme processors for high-end business or per-
sonal desktop markets.
The motherboard incorporates the Intel Eaglelake P45 Northbridge (NB) and Intel
ICH10R Southbridge (SB) chipsets. The Northbridge supports a Front Side Bus (FSB)
frequency of 1600(overclocking)/1333/1066 MHz using a scalable FSB Vcc_CPU.
The memory controller supports DDR3 memory DIMM frequencies of
1600(overclocking)/1333/1066/800. It supports four DDR3 sockets with maximum
memory size of 8 GB. High resolution graphics via two PCI Express x16 slots,
intended for Graphics Interface, are fully compliant to the PCI Express Base Specification Revision 2.0. It supports the ATI CrossFireXTM Technology that allows you
to install GPU graphics cards.
The ICH10R Southbridge supports two PCI slots which are PCI v2.3 compliant. It
implements an EHCI compliant interface that provides 480 Mb/s bandwidth for
twelve USB 2.0 ports (six USB ports and three USB 2.0 headers support additional six
USB ports). One onboard IDE connector supports two IDE devices in Ultra ATA 133/
100/66/33 mode. The Southbridge supports six SATA ports with maximum transfer
rate up to 3.0 Gb/s each. It supports Intel® Matrix Storage Technology, providing
both AHCI and RAID 0, 1, 5 and 10 configuration.
1
There is an advanced full set of I/O ports in the rear panel, including PS/2 mouse and
keyboard connectors, one serial port, one ESATA port, six USB ports, one LAN port
and audio jacks for microphone, line-in and 8-ch line-out.
Introducing the Motherboard
2
Feature
Processor
This motherboard uses an LGA775 type of Intel® Yorkfield/Wolfdale/CoreTM 2
Extreme
that carries the following features:
• Accommodates Intel® Yorkfield/Wolfdale/CoreTM 2 Extreme processors
• Supports a system bus (FSB) of 1600(overclocking)/1333/1066 MHz
Chipset
The P45 Northbridge (NB) and ICH10R Southbridge (SB) chipsets are based on an
innovative and scalable architecture with proven reliability and performance.
P45 (NB)
ICH10R (SB)
• Supports 36-bit host bus addressing, allowing the
CPU to access the entire 64 GB of the memory address space
• 2 GB/s point-to-point Direct Media Interface (DMI) to
ICH10 (1 GB/s each direction)
• Two PCI Express x16 slots, intended for Graphics
Interface, are fully compliant to the PCI Express Base
Specification Revision 2.0
• Supports 512-Mb and 1-Gb DDR2 and 512-Mb, 1-Gb,
and 2-Gb DDR3 DRAM technologies for x8 and x16
devices
• Enhanced DMA Controller , interrupt controller, and timer
functions
• Compliant with PCI Express Base Specification, revision 1.1
• Compliant with PCI v2.3 specification
• Compliant with SATA 3.0 Gb/s Host Controller
• Integrated USB 2.0 Host Controller supporting up to
twelve USB 2.0 ports
• Supports Intel® Matrix Storage Technology, providing
both AHCI and RAID 0, 1, 5 and 10 configuration
Memory
• Supports DDR3 1600(overclocking)/1333/1066/800 DDR3 SDRAM with
Dual-channel architecture
• Accommodates four unbuffered DIMMs
• Up to 2 GB per DIMM with maximum memory size up to 8 GB
Audio
• RealT ek ALC883 7.1ch High Definition audio CODEC
Onboard LAN
• Gigabit LAN, Athlos L1 PCIe GigaLAN controller
Introducing the Motherboard
Expansion Options
The motherboard comes with the following expansion options:
• Two PCI Express x16 slots for Graphics Interface
• Two PCI Express x1 slots
• Two 32-bit PCI v2.3 compliant slots
• One IDE connector supporting up to two IDE devices
• One floppy disk drive interface
• Six 7-pin SATA connectors
This motherboard supports Ultra DMA bus mastering with transfer rates of 133/
100/66/33 Mb/s.
Integrated I/O
The motherboard has a full set of I/O ports and connectors:
• Two PS/2 ports for mouse and keyboard
• One Serial port
• One ESATA port
• Six USB ports
• One LAN port
• Audio jacks for microphone, line-in and 8-ch line-out
BIOS Firmware
The motherboard uses AMI BIOS that enables users to configure many system
features including the following:
• Power management
• Wake-up alarms
• CPU parameters
• CPU and memory timing
• ECS M.I.B. BIOS
The firmware can also be used to set parameters for different processor clock
speeds.
1. Some hardware specifications and software items are subject to change
without prior notice.
2. Due to chipset limitation, we recommend that motherboard be operated in the ambiance between 0 and 50 °C.
3
Introducing the Motherboard
4
Specifications
CPU
Chipset
Memory
Expansion
Slots
Storage
Audio
LAN
Rear Panel I/O
Internal I/O
Connectors &
Headers
System BIOS
Form Factor • ATX Size, 305mm x 244mm
• LGA775 socket for Intel® Yorkfield/Wolfdale/CoreTM 2 Extreme processors
• FSB 1600(overclocking)/1333/1066 MHz
• Intel Eaglelake P45 & ICH10R
• North Bridge: Intel Eaglelake P45
• South Bridge: Intel ICH10R
• Dual-channel DDR3 memory architecture
• 4 x 240-pin DDR3 DIMM socket support up to 8 GB
• Supports DDR3 1600(overclocking)/1333/1066/800 DDR3
SDRAM
• 2 x PCI Express x16 slots
• 2 x PCI Express x1 slots
• 2 x PCI slots
• Support by Intel ICH10R
• 6 x Serial ATAII devices
• Supports RAID0, 1, 5, 10
• Support by JMicron® JMB361
• 2 x Ultra DMA 133/100/66 device
• 1 x ESATAII 3.0 Gb/s device
• RealT ek ALC883 7.1ch High Definition audio CODEC
• Gigabit LAN, Athlos L1 PCIE GigaLAN controller
• 1 x PS/2 keyboard & PS/2 mouse connectors
• 6 x USB ports
• 1 x ESATA port
• 1 x COM port
• 1 x RJ 45 LAN connector
• 1 x Audio port
• 1 x 24-pin ATX Power Supply connector & 8-pin 12V connector
• 1 x IDE connector
• 6 x Serial ATA connectors
• 3 x USB 2.0 headers support additional 6 USB ports
• 1 x Clear CMOS button
• 1 x Front panel header
• 1 x Front panel audio header
• 1 x CD_in header
• CPUFAN/SYSF AN connectors
• 1 x Reset button
• 1 x Power on button
• AMI BIOS with 8Mb SPI ROM
• Supports Plug and Play, STR/STD, Hardware monitor, PCI
interrupt selection, ACPI & DMI, CPU FSB adjustment (increase of 1MHz)
• Supports ACPI revision 1.0 specification
Introducing the Motherboard
Motherboard Components
Table of Motherboard Components
LABEL COMPONE NTS
1. CPU S ock et
2
. CPU_FAN1 CPU cooling fan connector
3. DDR3_1~4 240-pin DDR3 SDRAM slots
4. ATX_POWER Standard 24-Pin ATX Power connector
5. SATA1~6 Serial ATA connectors
6. PWR_BOT Power on button
7. RST_BOT Reset button
8. CASE_FAN C ase cooling fan c onnec tor
9. F_PANE L Front Panel Switch/LE D header
10. F_USB1~3 Front Panel USB headers
11. USBPWR_F1~2 Front Panel USB Power Select jumpers
12 . S P K Speaker header
13. CLR_CMOS Clear CMOS button
14. IDE Prim ary IDE connector
15. FDD Floppy disk dr ive connector
16. SPDIFO SPDIF out header
17. F_AUDIO Front Pane l Audi o heade r
18. CD _I N Analog Audi o I nput connector
19. PCI2~ 3 32-bi t a dd- on c ard slots
20. PCIE16X_1~2 PCI Expres s x16 graphics card slots
21. PCIE1/3 PCI Ex press x1 slots
22. USBPWR
2
3. AT X12V 4- pin +12V power connector
24. SYS_F AN1 System cooli ng f a n conne ctor
_R1~2 Rear USB/PS2 Power Select jumpers
L GA77 5 socket Intel
Extreme processors
This concludes Chapter 1. The next chapter explains how to install the motherboard.
®
Y orkfi eld/Wolfdale /CoreTM 2
Introducing the Motherboard
5
6
Memo
Introducing the Motherboard
Chapter 2
Installing the Motherboard
Safety Precautions
• Follow these safety precautions when installing the motherboard
• Wear a grounding strap attached to a grounded device to avoid damage from static electricity
• Discharge static electricity by touching the metal case of a safely
grounded object before working on the motherboard
• Leave components in the static-proof bags they came in
• Hold all circuit boards by the edges. Do not bend circuit boards
Choosing a Computer Case
There are many types of computer cases on the market. The motherboard complies
with the specifications for the ATX system case. Firstly, some features on the
motherboard are implemented by cabling connectors on the motherboard to indicators and switches on the system case. Make sure that your case supports all the
features required. Secondly, this motherboard supports one floppy diskette drive and
two enhanced IDE drives. Make sure that your case has sufficient power and space for
all drives that you intend to install.
Most cases have a choice of I/O templates in the rear panel. Make sure that the I/O
template in the case matches the I/O ports installed on the rear edge of the
motherboard.
This motherboard carries an ATX form factor of 305 x 244 mm. Choose a case that
accommodates this form factor.
7
Installing the Motherboard in a Case
Refer to the following illustration and instructions for installing the motherboard in
a case.
Most system cases have mounting brackets installed in the case, which correspond
the holes in the motherboard. Place the motherboard over the mounting brackets
and secure the motherboard onto the mounting brackets with screws.
Ensure that your case has an I/O template that supports the I/O ports and expansion
slots on your motherboard.
Installing the Motherboard
8
Do not over-tighten the screws as this can stress the motherboard.
Checking Jumper Settings
This section explains how to set jumpers for correct configuration of the motherboard.
Setting Jumpers
Use the motherboard jumpers to set system configuration options. Jumpers with
more than one pin are numbered. When setting the jumpers, ensure that the jumper
caps are placed on the correct pins.
The illustrations show a 2-pin jumper. When
the jumper cap is placed on both pins, the
jumper is SHORT. If you remove the jumper
cap, or place the jumper cap on just one pin,
the jumper is OPEN.
This illustration shows a 3-pin jumper. Pins
1 and 2 are SHORT
SHORT OPEN
Installing the Motherboard
Checking Jumper Settings
The following illustration shows the location of the motherboard jumpers. Pin 1 is
labeled.
Jumper Settings
Jumper Type Description Setting (default)
NO PUSH: NORMAL
CLR_CMOS
button
CLEAR CMOS
PUSH: CLEAR
Before clearing the
CMOS, make sure to
turn the system off.
CLR_CMOS
9
USBPWR_R1~2
To avoid the system instability after clearing CMOS, we recommend
1.
users to enter the main BIOS setting page to “Load Default Settings”
and then “Save & Exit Setup”.
Make sure the power supply provides enough 5VSB voltage before se-
2.
lecting the 5VSB function.
3.
It is required that users place the USBPWR_F1~2 & USBPWR_R1~2
cap onto 2-3 pin rather than 1-2 pin as default if you want to wake up
the computer by USB/PS2 KB/Mouse.
3-pin
3-pinUSBPWR_F1~2
Rear USB/PS2
Power Select
Jumper
Front Panel
USB Power
Select Jumper
1-2: VCC5
2-3: 5VSB
1-2: VCC5
2-3: 5VSB
Installing the Motherboard
1
USBPWR_R1~2
1
USBPWR_F1~2
10
Installing Hardware
Installing the Processor
Caution: When installing a CPU heatsink and cooling fan make sure that
you DO NOT scratch the motherboard or any of the surface-mount resistors with the clip of the cooling fan. If the clip of the cooling fan scrapes
across the motherboard, you may cause serious damage to the motherboard
or its components.
On most motherboards, there are small surface-mount resistors near the
processor socket, which may be damaged if the cooling fan is carelessly
installed.
Avoid using cooling fans with sharp edges on the fan casing and the clips.
Also, install the cooling fan in a well-lit work area so that you can clearly
see the motherboard and processor socket.
Before installing the Processor
This motherboard automatically determines the CPU clock frequency and system bus
frequency for the processor. You may be able to change the settings in the system
Setup Utility. We strongly recommend that you do not over-clock processors or
other components to run faster than their rated speed.
Warning:
1. Over-clocking components can adversely affect the reliability of the
system and introduce errors into your system. Over-clocking can permanently damage the motherboard by generating excess heat in components
that are run beyond the rated limits.
2. Always remove the AC power by unplugging the power cord from the
power outlet before installing or removing the motherboard or other
hardware components.
This motherboard has an LGA775 socket. When choosing a processor, consider the
performance requirements of the system. Performance is based on the processor
design, the clock speed and system bus frequency of the processor, and the quantity
of internal cache memory and external cache memory.
Installing the Motherboard
CPU Installation Procedure
The following illustration shows CPU installation components.
A. Read and follow the instructions shown
on the sticker on the CPU cap.
B. Unload the cap
· Use thumb & forefinger to hold the
lifting tab of the cap.
· Lift the cap up and remove the cap
completely from the socket.
C. Open the load plate
· Use thumb & forefinger to hold the
hook of the lever, pushing down and
pulling aside unlock it.
· Lift up the lever.
· Use thumb to open the load plate. Be
careful not to touch the contacts.
D. Install the CPU on the socket
· Orientate CPU package to the socket.
Make sure you match triangle marker
to pin 1 location.
E. Close the load plate
· Slightly push down the load plate onto
the tongue side, and hook the lever.
· CPU is locked completely.
11
F. Apply thermal grease on top of the CPU.
G. Fasten the cooling fan supporting base
onto the CPU socket on the motherboard.
H. Make sure the CPU fan is plugged to the
CPU fan connector. Please refer to the
CPU cooling fan user’s manual for more
detail installation procedure.
1. To achieve better airflow rates and heat dissipation, we suggest
that you use a high quality fan with 3800 rpm at least. CPU fan and
heatsink installation procedures may vary with the type of CPU fan/
heatsink supplied. The form and size of fan/heatsink may also vary.
2. DO NOT remove the CPU cap from the socket before installing a
CPU.
3. Return Material Authorization (RMA) requests will be accepted
only if the motherboard comes with the cap on the LGA775 socket.
Installing the Motherboard
12
Installing Memory Modules
This motherboard accommodates four memory modules. It can support four 240-pin
DDR3 1600(overclocking)/1333/1066/800. The total memory capacity is 8 GB.
DDR3 SDRAM memory module table
Memory module Memory Bus
DDR3 800 400 MHz
DDR3 1066 533 MHz
DDR3 1333 667 MHz
DDR3 1600 800 MHz
You must install at least one module in any of the four slots. Each module can be
installed with 2 GB of memory; total memory capacity is 8 GB.
The four DDR3 memory sockets (DDR3_1, DDR3_2, DDR3_3, DDR3_4) are divided into two channels and each channel has two memory sockets as following:
Channel 0: DDR3_1, DDR3_2
ff
Channel 1: DDR3_3, DDR4_4
ff
Do not remove any memory module from its antistatic packaging until
you are ready to install it on the motherboard. Handle the modules only
by their edges. Do not touch the components or metal parts. Always
wear a grounding strap when you handle the modules.
Installation Procedure
Refer to the following to install the memory modules.
1 This motherboard supports unbuffered DDR3 SDRAM only.
2 Push the latches on each side of the DIMM slot down.
3 Align the memory module with the slot. The DIMM slots are keyed with
notches and the DIMMs are keyed with cutouts so that they can only be
installed correctly.
4 Check that the cutouts on the DIMM module edge connector match the
notches in the DIMM slot.
5 Install the DIMM module into the slot and press it firmly down until it
seats correctly. The slot latches are levered upwards and latch on to
the edges of the DIMM.
6 Install any remaining DIMM modules.
Installing the Motherboard
Table A: DDR3 (memory module) QVL (Qualified Vendor List)
The following DDR3 1333/1066/800 memory modules have been tested and qualified
for use with this motherboard.
13
Type
DDR3 800
DDR3 1066
Size Vendor Module Name
512 MB
Nanya
NT512C64B88A0NY-25D
NT512C64B88A0NY-BF
2 GB HYNIX HYM T125U64ZNF8-S6 AA
Aeneon AE H760UD00-10FA98X
Elpida P C3-8500U-7-00-AP
512 MB
1 GB
2 GB
HYNIX
Kingston KVR1066D3N7
Micron MT4JTF6464AY-1G1B1
A-data M3O S S3H3I3120B5Z
Aeneon AE H760UD00-10FA98X
Corsair CM3X1024-1066C7
HYNIX
Kingston KVR1066D3N7/1G
Micron MT8JTF12864AY-1G1D1
Qimonda
Sam sung
Winchip 64A0TPHN8G17E
Elixir
HYNIX
Infinity 04092G16DY7U4A
Kingston
Mic ron
Qimonda
Samsung M378B5673DZ1-CF8 0842
HYM T164U64ZNF6-G8 AA
HYM T164U64ZNF8-G8 AA
HMT112U6AFP8C-G7N0 AA
HYM T112U64ZNF8-G8 AA
IMSH1GU03A1F1C-10F
B2S81427023
IMSH1GU03A1F1C-10G
B2S81427034
IMSH1GU13A1F1C-13H
Golden Bar M378B2873DZ1-
CF8 0818
M378B2873DZ1-CF8 0842
M2F2G64CB8H A4N -BE
0831.TW
HMT125U6AFP8C-G7N0 AA
HYM T125U64ZNF8-G8 AA
KVR1066D3N7/2G 1.5V
9905403-006.A00LF
MT16JTF25664AY-1G1D1
MT18JTF25664AY-1G1D1
IMSH2GU13A1F1C-10F
B3S81427044
IMSH2GU13A1F1C-10G
B3S81528005
Installing the Motherboard
14
Type
Size Vendor Module Name
1 GB
DDR3 1333
2 GB
DDR3 1600 1 GB
Aeneon AXH760UD00-13GA98X
Cors air
Hynix HMT112U6AFP8C-H9N0 AA
Kingston KVR1333D 3N9
Qimonda IMSH1GU13A1F1C-13H
Samsung M 378B2873DZ1-CH9 0842
A-data M3OS S 6H3J4130E 1C5Z
Elixir M2F2G 64CB8HA4N-CG
Hexon=NCP ELPH8AUDR-13M88
Hynix HMT125U6AFP8C-H9N0 AA
Kingston KVR1333D3N9K2/2G
Qimonda
Samsung M 378B5673DZ1-CH9 0842
Kingston KHX 12800D3K3
CM3X1024-1333C9
CM3X1024-1333C9DHX
IMSH2GU13A1F1C-13H
B3S81124001
Installing the Motherboard
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