This equipment has been tested and found to comply with the limits of 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 ge nerates, uses, and can radiate radio frequency
energy and, if not i nstalled and used in accordance with the instructions, may
cause harmful interference to radio communications. There is no guarantee
that interference will not occur in a particular installation.
The vendor makes no representations or warranties with respect to the
contents here and specially disclaims any implied warranties of merchantability
or fitness for any purpose. Further the vendor reserves the right to revise this
publication and to make changes to the contents here without obligation to
notify any party beforehand.
Duplication of this publication, in part or in whole, is not allowed without first
obtaining the vendor’s approval in writing.
The content of this user’s manual is subject to be changed without notice and
we will not be responsible for any mistakes found in this user’s manual. All the
brand and product names are trademarks of their respective companies.
Japanese ................................................................................................................ 50
CHAPTER 1: INTRODUCTION
NF720D A2G+
1.1 B
EFORE YOU START
Thank you for choosing our product. Before you start installing the
motherboard, please make sure you follow the instructions below:
Prepare a dry and stable working environment with
sufficient lighting.
Always disconnect the computer from power outlet
before operation.
Before you take the motherboard out from anti-static
bag, ground yourself properly by touching any safely
grounded appliance, or use grounded wrist strap to
remove the static charge.
Avoid touching the components on motherboard or the
rear side of the board unless necessary. Hold the board
on the edge, do not try to bend or flex the board.
Do not leave any unfastened small parts inside the
case after installation. Loose parts will cause short
circuits which may damage the equipment.
Keep the computer from dangerous area, such as heat
source, humid air and water.
1.2PACKAGE CHECKLIST
IDE Cable X 1 Serial ATA Cable X 1 Rear I/O Panel for ATX Case X 1 Installation Guide X 1 Fully Setup Driver CD X 1 (full version manual files inside) FDD Cable X 1 (optional) USB 2.0 Cable X1 (optional) Serial ATA Power Cable X 1 (optional)
Note: The package contents may differ by area or your motherboard version.
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Motherboard Manual
/
1.3 MOTHERBOARD FEATURES
Socket AM2+
CPU
FSB
Chipset nForce 720a / nForce 720d
Super I/O
Main
Memory
IDE Int egrat ed IDE Co ntro l le r
SATA II Integrated Serial ATA Controller
LAN Realtek RTL 8111C
Sound ALC662
Slots
On Board
Connector
AMD Athlon 64 / Athlon 64 FX
/ Sempro n / Ph eno mX3 / Pheno mX4
processors (Max imum Watt: 95W )
Support HyperTransport 3.0
Supports up to 5.2 GT/s Bandwidth
ITE 8718
Prov ides the most commonly used legac y
Super I/O functionality
DDR2 DIMM Slots x 4
Max Memory Capacity 16GB
Each DIMM supports 256MB/512MB/
1GB/2GB/4GB DDR2
PCI Express Gen2 x16 slot x1
PCI Express x1 slot x2
PCI slot x3
Floppy connector x1 Each connector supports 2 Floppy drives
IDE Conn ector x1 Each connector supports 2 IDE device
SATA Connector x6 Each connector supports 1 SATA devices
Front Panel Connector x1 Supports front panel facilities
Front Audio Connector x1 Supports front panel audio function
Athlon 64 x2
SPEC
AMD 64 Architecture enables 32 and 64 bit
computing
Supports Hyper Transport 3.0 and PowerNow
Low Pin Count Interface
En v ironm ent C o ntro l in iti at i ves
H/W Mon itor
ITE's "S mart Guardian " funct ion
Dual Channel Mode DDR 2 me mo ry modu le
Supports DDR2 533 / 667 / 800
Supports DDR2 1066 (by AM2+ CPU)
Register ed DIMM and ECC D IMM is not supported
Ultra DMA 33 / 66 / 100 / 133 Bus Master Mode
supports PIO Mode 0~4,
Data transfer rates up to 3 Gb/s
SATA Vers io n 2. 0 specif ic at io n co mpliant
10 / 100 /1000 Mb/s auto negotiation
Half / Full duplex capability
5.1 channels audio out
High Definition Audio
Supports PCI-E Gen2 x16 expansion cards
Supports PCI-E x1 expansion cards
Supports PCI expansion cards
2
SPEC
CD-in Connector x1 Supports CD audio-in function
CPU Fan header x1 CPU Fan power supply (with Smart Fan function)
System Fan head er x1 Sys tem Fan Po wer supply
CMOS clear header x1 Restore CMOS data to factory default
USB connector x2 Each connect or support s 2 fro nt panel USB ports
Power Connector (24pin) x1 Connects to Power supply
Power Connector (4pin) x1 Connects to Power supply
Printer Port Connector x1 Each connector supports 1 Printer port
Serial port Connector x1 Connects to RS-232 Port
PS/2 Ke yboard x1
Back Panel
I/O
Board Size 189 mm(W) x 293 mm(L) ATX
Special
Features
OS Support Windows XP / VISTA
PS/2 Mous e x1
LAN port x1
USB Port x6
Audio Jack x3
RAID 0 / 1 / 5 / 0+1 support
Connects to PS/2 Keyboard
Connects to PS/2 Mouse
Connect to RJ- 45 ethernet cab le
Connect to USB devices
Provide Audio-In/Out and microphone connection
Biostar Reserves the right to add or remove support
for any OS With or without notice.
1.4 R
EAR PANEL CONNECTORS
NF720D A2G+
PS/ 2
Mouse
PS / 2
Keyboar d
USBX2
LAN
Line In/
Surround
Line Out
Mic In 1/
Bass/ Center
USBX2USBX2
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Motherboard Manual
1.5MOTHERBOARD LAYOUT
JATXPWR2
JPSPW1
JKBMS1
JUSB6
JU SB1
JRJ4 5USB1
JAUDIO 1
LAN
JUSBPW1
JAUDIOF1
Codec
JCDIN1
JATX PW R1
PCI -EX 1_ 1
PCI-EX1_2
PCI-EX1
nForce
720a / 720d
JCFAN1
Socket AM2+
DIMMB1
DIMMA1
DIMMA2
SATA2 SATA3 SATA6
SATA1 SATA4 SATA5
DIMMB2
ID E1
4
Note: represents the 1■
Super I/O
JCO M2
PC I1
PC I2
PCI3
st
pin.
BAT1
JPRNT1
JPANEL1
BIOS
JCMOS1
FDD1
JUSB4JUSB3
JUSBPW2
JSFAN1
CHAPTER 2: HARDWARE INSTALLATION
NF720D A2G+
2.1 I
NSTALLING CENTRAL PROCESSING UNIT (CPU)
Step 1: Remove the socket protection cap.
Step 2: Pull the lever toward direction A from the socket and then raise the
lever up to a 90-degree angle.
Step 3: Look for the white triangle on socket, and the gold triangle on
CPU should point towards this white triangle. The CPU will fit only
in the correct orientation.
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Motherboard Manual
Step 4: Hold the CPU down firmly, and then close the lever toward direct
B to complete the installation.
Step 5: Put the CPU Fan on the CPU and buckle it. Connect the CPU
FAN power cable to the JCFAN1. This completes the installation.
Note: Please update the BIOS to the latest version while using AM2+ CPUs. Due to the latest CPU
transition, you may encounter the situation that the new system failed to boot while using new
AM2+ CPUs. In this case, please install one standard AM2 CPU to boot your system, a nd
update the latest BIOS from our website for AM2+ CPUs support.
6
NF720D A2G+
1
2.2 FANHEADERS
These fan headers support cooling-fans built in the computer. The fan
cable and connector may be different according to the fan manufacturer.
Connect the fan cable to the connector while matching the black wire to
pin#1.
JCFAN1: CPU Fan Header
4
JSFAN1: System Fan Header
Pin
Assignment
1 Ground
2 +12V
3
FAN RPM r ate
sense
4 Smart Fan
Control (By Fan)
Pin
Assignment
1 Ground
2 +12V
3 FAN RPM rate
sense
13
Note:
The JCFAN1 supports 4-pin head connector. The JSFAN1 supports 3-pin head
connector. When connecting with wires onto connectors, please note that the red wire is
the positive and should be connected to pi n#2, and the black wire is Ground and should
be connected to GND.
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Motherboard Manual
2.3 INSTALLING SYSTEM MEMORY
A. Memory Modules
DIMMA1
DIMMB1
1. Unlock a DIMM slot by pressing the retaining clips outward. Align a
DIMM on the slot such that the notch on the DIMM matches the
break on the Slot.
DIMMA2
DIMMB2
2. Insert the DIMM vertically and firmly into the slot until the retaining
chip snap back in place and the DIMM is properly seated.
8
NF720D A2G+
B. Memory Capacity
DIMM Socket
Location
DIMMA1 256MB/512MB/1GB/2GB/4GB
DIMMB1 256MB/512MB/1GB/2GB/4GB
DIMMA2 256MB/512MB/1GB/2GB/4GB
DIMMB2 256MB/512MB/1GB/2GB/4GB
DDR2 Module
Total Me m ory
Size
Max is 16GB.
C. Dual Channel Memory installation
To trigger the Dual Channel function of the motherboard, the memory module
must meet the following requirements:
Install memory module of the same density in pairs, shown in the following
table.
Dual Channel Status
Enabled O O X X
Enabled X X O O
Enabled O O O O
(O means memory installed, X means memory not installed.)
The DRAM bus width of the memory module must be the same (x8 or
x16)
DIMMA1
DIMMB1 DIMMA2 DIMMB2
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Motherboard Manual
133
2.4 CONNECTORS AND SLOTS
FDD1: Floppy Disk Connector
The motherboard provides a standard floppy disk connector that supports 360K,
720K, 1.2M, 1.44M and 2.88M floppy disk types. This connector supports the
provided floppy drive ribbon cable.
IDE1: IDE/ATAPI Connector
The motherboard has a 32-bit Enhanced PCI IDE Controller that provides PIO
Mode 0~4, Bus Master, and Ultra DMA 33/66/100/133 functionality.
The IDE connector can connect a master and a slave drive, so you can connect
up to two drives.
234
10
3940
21
NF720D A2G+
PCI-EX1: PCI-Express Gen2 x16 Slot
- PCI-Express 2.0 compliant.
- Maximum theoretical realized bandwidth of 8GB/s simultaneously per
direction, for an aggregate of 16GB/s totally.
PCI-EX1_1/ PCI-EX1_2: PCI-Express x1 Slots
- PCI-Express 1.1 compliant.
- Data transfer bandwidth up to 250MB/s per direction; 500MB/s in total.
- PCI-Express supports a raw bit-rate of 2.5Gb/s on the data pins.
This motherboard is equipped with 3 standard PCI slots. PCI stands for
Peripheral Component Interconnect, and it is a bus standard for expansion
cards. This PCI slot is designated as 32 bits.
PCI1
PCI2
PCI3
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Motherboard Manual
CHAPTER 3: HEADERS & JUMPERS SETUP
3.1 H
OW TO SETUP JUMPERS
The illustration shows how to set up jumpers. When the jumper cap is
placed on pins, the jumper is “close”, if not, that means the jumper is
“open”.
Pin opened Pin closed Pin1-2 closed
3.2 DETAIL SETTINGS
JPANEL1: Front Panel Header
This 16-pin connector includes Power-on, Reset, HDD LED, Power LED, and
speaker connection. It allows user to connect the PC case’s front panel switch
functions.
PWR _LED
On/Off
-
9
1
++
SPK
HLED
16
8
-
+
RST
12
Pin Assignment Function Pin Assignment Function
1 +5V 9 N/A
2 N/A 10 N/A
3 N/ A 1 1 N/A N/A
4 Speaker
5 HDD LED (+) 13 Power LED (+)
6 HDD LED (-)
7 Ground 15 Power button
8 Reset control
Speaker
Connector
Hard drive
LED
Reset button
12 Power LED (+)
14 Power LED (-)
16 Ground
N/A
Power LED
Power-on button
NF720D A2G+
JATXPW R1: ATX Power Source Connector
This connector allows user to connect 24-pin power connector on the ATX
power supply.
By connecting this connector, it will provide +12V to CPU power circuit.
23
4
1
Pin
Assignment
1 +12V
2 +12V
3 Ground
4 Ground
Note:
Before power on the system, please make sure that both JATXPWR1 and JATXPWR2
connectors have been plugged-in.
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Motherboard Manual
JUSB3/JUSB4: Headers for USB 2.0 Ports at Front Panel
These headers allow user to connect additional USB cable on the PC front panel,
and also can be connected with internal USB devices, like USB card reader.