AMD A75 User manual

USER'S MANUAL
Of
AMD A75 /A55 Chipset
Based
M/B for Socket FM1 AMD Processor
Trademark:
* Specifications and information contained in this documentation are furnished for information use only, and are
subject to change at any time without notice, and should not be construed as a commitment by manufacturer.
NO. G03-A55M-F
Rev
： 1.0
Released in: October, 2011

ii
Environmental Safety Instruction
zAvoid the dusty, humidity and temperature extremes. Do not place the product in any
area where it may become wet.
z0 to 40 centigrade is the suitable temperature. (Actual figure depends on the request of
the main chipset)
zGenerally speaking, dramatic changes in temperature may lead to contact malfunction
and crackles due to constant thermal expansion and contraction from the welding
spots’ that connect components and PCB. Computer should go through an adaptive
phase before it boots when it is moved from a cold environment to a warmer one to
avoid condensation phenomenon. These water drops attached on PCB or the surface
of the components can bring about phenomena as minor as computer instability
resulted from corrosion and oxidation from components and PCB or as major as short
circuit that can burn the components. Suggest starting the computer until the
temperature goes up.
zThe increasing temperature of the capacitor may decrease the life of computer. Using
the close case may decrease the life of other device because the higher temperature in
the inner of the case.
zAttention to the heat sink when you over-clocking. The higher temperature may
decrease the life of the device and burned the capacitor.
Environmental Protection Announcement
Do not dispose this electronic device into the trash while discarding. To minimize pollution
and ensure environment protection of mother earth, please recycle.

ii
CHAPTER 1 INTRODUCTION OF MOTHERBOARDS
1-1 MOTHERBOARD SPECIFICATION...........................................................................1
1-2 SPECIAL FREATURES ............................................................................................2
1-3 LAYOUT DIAGRAM ..................................................................................................4
CHAPTER 2 HARDWARE INSTALLATION
2-1 HARDWARE INSTALLATION STEPS.......................................................................6
2-2 JUMPER SETTING......................................................................................................6
2-3 CPU INSTALLATION..................................................................................................7
2-3-1 ABOUT AMD FM1 CPU SOCKET................................................................7
2-3-2 CPU INSTALLATION GUIDE .......................................................................7
2-4 MEMORY INSTALLATION.........................................................................................8
2-5 EXPANSION CARD INSTALLATION.........................................................................9
2-5-1 EXPANSION SLOTS.....................................................................................9
2-5-2 PROCEDURE FOR EXPANSION CARD INSTALLATION..........................9
CHAPTER 3 CONNCTORS AND HEADERS
3-1 I/O BACK PANEL CONNECTORS.............................................................................10
3-2 MOTHERBOARD INTERNAL CONNECOTRS..........................................................11
3-3 HEADERS ...................................................................................................................13
CHAPTER 4 USEFUL HELP
4-1 HOW TO UPDATE BIOS ............................................................................................15
4-2 TROUBLE SHOOTING ...............................................................................................15
APPENDIX...................................................................................................................16
TABLE OF CONTENT

1
Chapter 1
Introduction of Motherboards
1-1 Motherboard Specification
Spec Description
Design zMicro-ATX Form Factor
zSize: 24.5 x 19.0 cm
Chipset zAMD™ A75 FCH (Hudson D3) Chipset (Optional for A75M series)
zAMD™ A55 FCH (Hudson D2) Chipset (Optional for A55M series)
CPU Socket
zAMD™ Socket FM1：
zSupport AMD™ A- & E2- “Lynx” Series APU
* For more detailed CPU support information please visit our website
Memory Slot
z240-pin DDRIII Module slot x 2
zSupport 2pcs of DDRIII 1066/1333/1600/1866 memory modules
expandable to 8GB
zDual channel supported
Expansion
Slot
z1pcs * PCI-Express 2.0 x16 by 16 lane slot
z1pcs * PCI-Express 2.0 x1 slot
z1pcs * 32-bit PCI slot
z
Storage z4 * SATAIII 6Gb/s connectors (Optional for A75M series)
z4* SATAII 3Gb/s connectors (Optional for A55M series)
LAN Chip
zIntegrated with PCI-E megabit LAN chip providing 10/100Mbps data
transfer rate
zSupport Fast Ethernet LAN function
HD Audio Chip z6-channel HD Audio Audio Codec integrated
zAudio driver and utility included
BIOS z16MB Flash ROM BIOS
Multi I/O
zPS/2 keyboard connector x1
zPS/2 mouse connector x1
zVGA connector x1
zDVI connector x1
zHDMI connector x 1
zUSB 2.0 port x 2 + USB 3.0 port x 2(Optional for A75M series)
zUSB 3.0 header x1 (Optional for A75M series)
zUSB 2.0 port x 4 (Optional for A55M series)
zUSB 2.0 header x 2
zRJ-45 LAN connector x1
zAudio connector x1
zFront panel audio header x1
zHDMI-SPDIF header x1
zSpeaker header x1
zPWR LED header x1
zFront panel header x1
Item Checklist
zMotherboard
zDVD for motherboard utilities
zUser’s Manual
zHard Disk Cable
zBack Shied

2
1-2 Special Features
APU
Accelerated Processing Unit (APU) is the unique combination of
CPU and GPU computing technology. It is designed to vastly
improve today’s internet, video processing, playback and gaming
experiences.
AMD Radeon™ Dual Graphics
The AMD™ Dual Graphics technology combines APU and GPU
computing power to optimize user’s visual experience.
Microsoft®DirectX®11
DirectX ® 11 is the latest in high speed, high fidelity gaming and
computing. It can enable not just more visually stunning games, but
significant performance improvements in some of your favorite
websites and everyday applications.
AMD Steady Video™
New Video Post Processing Capability: automatic jitter reduction on
home/online video.
AMD Turbo
Core™
AMD Turbo Core™
Dynamic adjustment of CPU and GPU performance, Automatically
detects the load, without any driver support.
AMD Steady Video™

3
USB 3.0 (Optional for A75M series)
Experience Fastest data transfers at 5Gb/s with USB3.0 the new
latest connectivity standard. Built connect easily with nextgeneration
components and peripherals, USB3.0 transfers data 10x faster and
backward compatible with previous USB2.0 components.
SATA 3.0 (Optional for A75M series)
SATA3.0 6Gb/s provides a higher bandwidth to retrieve and transfer
HD media. With this super speed data transfer, SATA3.0 allows an
incredible data boost which is 2x faster than the SATA 3Gb/s.
CPU Vcore OC-CON Solid Capacitors
This series of boards adopt OC-CON solid capacitors for CPU
Vcore power. OC-CON solid capacitors make it possible for
motherboard to work from 55 degrees Centigrade below zero to 125
degrees centigrade. OC-CON capacitors possess superior physical
characteristics to prolong product life ten times than corresponding
motherboard without capacitors every time working temperature
increases 20 degrees. Life of product of motherboard with solid
capacitors declines only 10% of those without solid capacitors as
well under same conditions.
Other Features
include: CPU Smart Fan—Noise Management System
It’s never been a good idea to gain the performance of your system
by sacrificing its acoustics. CPU Smart Fan Noise Management
System is the answer to control the noise level needed for
now-a-day’s high performance computing system. The system will
automatically increase the fan speed when CPU operating loading is
high, after the CPU is in normal operating condition, the system will
low down the fan speed for the silent operating environment. The
system can provide the much longer life cycle for both CPU and the
system fans for game use and business requirements.
CPU Vcore X-Shift—Shift to Higher Performance
The CPU voltage can be adjusted for the precisely over-clocking of
extra demanding computing performance.
Normal load, APU to keep
low frequency energy
3D games, film and television
production and other heavy loads, APU
automatic over clocking
0 ~ 400MHz

4
1-3 Layout Diagram
For A75M Series Motherboard:
Megabit LAN Chip
Front Panel Header
AMD FM1
Socket
ATX Power Conn.
PCI Slot
PS2 KB &MS
Ports
RJ-45 over
USB 2.0 Ports
DDRIII Slot x 2
ATX 12V Power Connecto
r
6-CH
HD Audio Chip Power LED Header
USB 2.0 Headers
Front Panel
Audio Header
CPUFAN Header
SYSFAN1 Header
PCI Express x16 by 16-lane Slot
Speaker Header
USB 3.0 Ports
JBAT
VGA Port
Audio Connector
SATAIII Hard Disk
Ports
(SATA1/2/3/4)
JP2
DVI Port
HDMI Port
USB 3.0 Header
AMD A75 Chipset
HDMI-SPDIF Header
PCI Express x1 Slot
RJ-45 LAN Port
USB 2.0 Ports
PS/2 Keyboard
Port
VGA Port
PS/2 Mouse
Port Line-In
Line-Out
MIC-In
DVI Port HDMI Port
USB 3.0 Ports

5
For A55M Series Motherboard:
Megabit LAN Chip
Front Panel Header
AMD FM1
Socket
ATX Power Conn.
PCI Slot
PS2 KB &MS
Ports
RJ-45 over
USB 2.0 Ports
DDRIII Slot x 2
ATX 12V Power Connecto
r
6-CH
HD Audio Chip Power LED Header
USB 2.0 Headers
Front Panel
Audio Header
CPUFAN Header
SYSFAN1 Header
PCI Express x16 by 16-lane Slot
Speaker Header
USB 2.0 Ports
JBAT
VGA Port
Audio Connector
SATAII Hard Disk
Ports
(SATA1/2/3/4)
JP2
DVI Port
HDMI Port
AMD A55 Chi
p
set
HDMI-SPDIF Header
PCI Express x1 Slot
USB 2.0 Ports
PS/2 Keyboard
Port
VGA Port
PS/2 Mouse
Port Line-In
Line-Out
MIC-In
DVI Port HDMI Port
RJ-45 LAN Port

6
Chapter 2
Hardware Installation
WARNING! Turn off your power when adding or removing expansion cards or
other system components. Failure to do so may cause severe
damage to both your motherboard and expansion cards.
2-1 Hardware Installation Steps
Before using your computer, you had better complete the following steps:
1. Check motherboard jumper setting
2. Install CPU and Fan
3. Install System Memory (DIMM)
4. Install Expansion cards
5. Connect hard disk and front panel /back panel cable
6. Connect ATX Power cable
7. Power-On and Load Standard Default
8. Reboot
9. Install Operating System
10. Install Driver and Utility
2-2 Jumper Setting
(1) CMOS RAM Clear (3-pin): JBAT
A battery must be used to retain the motherboard configuration in CMOS RAM
short 1-2 pins of JBAT to store the CMOS data.
To clear the CMOS, follow the procedure below:
1. Turn off the system and unplug the AC power.
2. Remove ATX power cable from ATX power connector.
3. Locate JBAT and short pins 2-3 for a few seconds.
4. Return JBAT to its normal setting by shorting pins 1-2.
5. Connect ATX power cable back to ATX power connector.
Note: When should clear CMOS
1. Troubleshooting
2. Forget password
3. After over clocking system boot fail
CMOS RAM Clear Setting
2-3 Closed: Clear CMOS
JBATJBAT
1-2 Closed: Normal

7
(2) Keyboard/USB function Enabled/Disabled: JP2
Keyboard/ & USB Power On Setting
2-3 Closed: KB/USB Power ON Enabled
JP2
JP2
1-2 Closed:KB/USB Power ON Disable (Default)
2-3 CPU Installation
2-3-1 About AMD FM1 CPU Socket
This motherboard provides an AMD FM1 socket.
The CPU that comes with the motherboard should have a cooling FAN attached to
prevent overheating. If this is not the case, then purchase a correct cooling FAN
before you turn on your system.
WARNING! Be sure that there is sufficient air circulation across the processor’s
heatsink and CPU cooling FAN is working correctly, otherwise it may
cause the processor and motherboard overheat and damage, you
may install an auxiliary cooling FAN, if necessary.
To install a CPU, first turn off your system and remove its cover. Then find Pin-1
(small triangle indicator) of the CPU and make sure to install it matched with Pin-1
(small triangle indicator) of the CPU socket. See to it that system is turned off and the
installation direction is correct. If the installation direction is wrong, CPU can not be
installed into the socket. In this case do not try to force it into the socket, but to change
to the correct direction.
2-3-2 CPU Installation Guide
1. Locate APU socket.
2. Find APU socket
Pin-1(with small triangle
indicator).
3. Find APU Pin-1
(with small triangle
indicator).

8
4. Open the socket by
pulling the level
sideways away from the
socket and then upwards
to a 90-degree angle.
5. Insert compatible APU
into APU socket and see
to it that APU Pin-1
should be matched into
APU socket Pin-1 during
installation.
6. Put the level to the
original place of the
socket. Make sure that
the notched corner
should point towards
the end of the level.
2-4 Memory Installation
This motherboard provides two 240-pin DDR III SDRAM DUAL INLINE MEMORY
MODULES (DIMM) socket for DDRIII memory expansion to maximum memory
volume of 8GB.
Valid Memory Configuration
Bank 240-Pin DIMM PCS Maximum Capacity
DIMM1 DDR III 800/1066/1333/1600/1866 X1 4 GB
DIMM2 DDR III 800/1066/1333/1600/1866 X1 4GB
Total System Memory (Max.4GB) 2 8GB
Recommend DIMM Module Combination
1. One DIMM Memory Module ----Plug in DIMM 1.
2. Two DIMM Memory Modules---Plug in DIMM1 and DIMM2 for Dual channel
function.
Dual channel Limited!
1. Dual channel function only supports when 2 memory modules pluged in both
DIMMI1 & DIMM 2.
2. Memory modules plugged in DIMMI1 & DIMM 2 must be of the same type, same
size, and same frequency for dual channel function.
Install DDRIII modules to your motherboard is not difficult, you can refer to figure
below to see how to install DDRIII 800/1066/ 1333/1600/1866 SDRAM module.

9
DIMM1&DIMM2
Su
pp
ort Dual-Channel
NOTE! When you install DIMM module fully into the DIMM socket the eject tabs
should be locked into the DIMM module very firmly and fit into its indention on both
sides.
2-5 Expansion Card Installation
2-5-1 Expansion Slots
This series of boards offers one PCI-Express 2.0 x 16 by 16 lane graphics slot, one
PCI Express 2.0 x1 slot and one 32-bit PCI slot to guarantee the rich connectivity for
the I/O of peripherals.
2-5-2 Procedure for Expansion Card Installation
1. Read the documentation for your expansion card and make any necessary
hardware or software setting for your expansion card such as jumpers.
2. Remove your computer’s cover and the bracket plate on the slot you intend to
use.
3. Align the card’s connectors and press firmly.
4. Secure the card on the slot with the screen you remove above.
5. Replace the computer system’s cover.
6. Set up the BIOS if necessary.
7. Install the necessary software driver for your expansion card.
PCI-E 2.0 x16 by 16 Lane Slot
PCI-E 2.0 x1 Slot
PCI Slots

10
Chapter 3
Connectors and Headers
3-1 I/O Back Panel Connectors
* Note: The above diagram is for illustration purpose only. Different models may differ in rear panel
connectors. Please refer to the actual product you purchase.
(1) PS/2 Mouse & PS/2 Keyboard Connector: KB
The connectors are for PS/2 keyboard and PS/2 Mouse.
(2) D-Sub 15-pin Connector: VGA
VGA is the 15-pin D-Subminiature female connector; it is for the display devices,
such as the CRT monitor, LCD monitor and so on.
(3) Digital Visual Interface: DVI
This interface standard designed to maximize the visual quality of digital display
devices such as flat panel LCD computer displays and digital projectors.
(4) High-Definition Multimedia Interface: HDMI
This point-to-point interface is for audio and video signals designed as a
single-cable solution for home theater and consumer electronics equipment.
NOTE! DVI and HDMI Connector can not be used at the same time.
(5) USB 3.0 Ports: USB3_1 (Optional for A75M series)
These blue connectors are 4-pin USB 3.0 connectors to connect USB devices to
the system board.
(6) USB 2.0 Ports: from CN2 (Optional for A55M)/ UL1
The connectors are 4-pin USB 2.0 connectors to connect USB devices to the
system board.
(7) RJ-45 LAN Port connector: from UL1
The connector is standard RJ-45 connector for Network. It supports 10/100
Mbps data transfer rate.
(8) Audio Line-In, Line-Out, MIC Connector: CN3
These Connectors are 3 Phone-Jack for LINE-OUT, LINE-IN, and MIC audio
connections.
Line-in: (BLUE) Audio input to sound chip
Line-out: (GREEN) Audio output to speaker
MIC: (PINK) Microphone Connector
USB 2.0 Ports
PS/2 Keyboard
Port
VGA Port
RJ-45 LAN Port
PS/2 Mouse
Port Line-In
Line-Out
MIC-In
DVI Port HDMI Port
Optional
USB 2.0/ USB 3.0
Ports

11
3-2 Motherboard Internal Connectors
(1) Power Connector (24-pin block): ATXPWR1
ATX Power Supply connector: This is a new defined 24-pin connector that
usually comes with ATX case. The ATX Power Supply allows using soft power
on momentary switch that connect from the front panel switch to 2-pins Power
On jumper pole on the motherboard. When the power switch on the back of the
ATX power supply turned on, the full power will not come into the system board
until the front panel switch is momentarily pressed. Press this switch again will
turn off the power to the system board.
** We recommend that you use an ATX 12V Specification 2.0-compliant power
supply unit (PSU) with a minimum of 350W power rating. This type has 24-pin
and 4-pin power plugs.
** If you intend to use a PSU with 20-pin and 4-pin power plugs, make sure that the
20-pin power plug can provide at least 15A on +12V and the power supply unit
has a minimum power rating of 350W. The system may become unstable or may
not boot up if the power is inadequate.
** Please refer to Figure 1 for 20-pin power plug connection. Power plug and
motherboard power connectors has adopted key design to avoid installation
mistake through connection can be made easily if in the proper direction. If the
installation direction is incorrect and you make the connection by force both the
board and the power supply can be burned. Please see to it that the direction is
correct during installation.
Figure 1: 20-pin power plug Figure2: 24-pin power plug
Pin 1
ROW1 ROW2
24-Pin
ROW1 ROW2
Pin 1
20-Pin
PIN ROW1 ROW2
1 3.3V 3.3V
2 3.3V -12V
3 GND GND
4 5V Soft Power On
5 GND GND
6 5V GND
7 GND GND
8 Power OK -5V
9 +5V (for Soft Logic) +5V
10 +12V +5V
11 +12V +5V
12 +3V GND

12
(2) ATX 12V Power Connector (4-pin block): ATX12V2
This is a new defined 4-pins connector to provide extra 12V for system stability.
Without this connector might cause system unstable because the power supply
can not provide sufficient current for system.
ATX12V
+12V +12V
Pin1
3
2
4
GNDGND
(3) FAN Power Headers: SYSFAN1 (3-pin), CPUFAN1 (4-pin)
These connectors support cooling fans of 350mA (4.2 Watts) or less, depending
on the fan manufacturer, the wire and plug may be different. The red wire should
be positive, while the black should be ground. Connect the fan’s plug to the
board taking into consideration the polarity of connector.
FAN Power Headers
SYSFAN1
CPUFAN
14
1
3
(4)SATA Hard Disk Connector: SATA1, SATA 2, SATA3, SATA4
These are SATA hard disk ports. Please connect SATA device to the connector
with SATA cable. One connector supports one SATA device.
* Note: SATA hard disk ports from A75M are SATAIII connectors that support SATA 6Gb/s
specification. SATA hard disk ports from A55M are SATAII connectors that support SATA 3Gb/s
specification
Pin No. Defnition
1 GND
2 TXP
3 TXN
4 GND
5 RXN
6 RXP
7 GND

13
3-3 Headers
(1) Line-Out/MIC Header for Front Panel (9-pin): AUDIO1
These headers connect to Front Panel Line-out, MIC connector with cable.
Line-Out, MIC Headers
AUDIO
Pin 1
Lineout2-L Lineout2-R
Sense-FB
Audio-GND
LINE2-JD
Audio-JD
2
9
10
KEY
MIC2-L
MIC2-JD
MIC2-R
(2) USB 2.0 Port Headers (9-pin): USB1/USB2
These USB 2.0 headers are used for connecting the additional USB 2.0 port
plugs. By attaching an option USB 2.0 cable, your can be provided with two
additional USB 2.0 plugs affixed to the back panel.
USB Port Headers
Pin1
VCC
-DATA
GND
+DATA
VCC
OC
-DATA
GND
+DATA
(3) USB 3.0 Port Headers (19-pin): USB3_2 (Optional for A75M series only)
This USB 3.0 header is used for connecting the additional USB 3.0 port plugs.
By attaching an optional USB 3.0 cable, your can be provided with two
additional USB 30 plugs affixed to the back panel.
USB 3.0 Header
SSRX1- SSRX1+
GND1
SSTX1-
SSTX1+
GND0
D1-
D1+
VBUS
10
Pin 1
NCD2+
D2-
GND2
SSTX2+
SSTX2-
GND3
SSRX2+
SSRX2-
V
BUS2
12
20
(4) Speaker connector: SPEAK1
This 4-pin header connects to the case-mounted speaker. See the figure below.
(5) Power LED: PWR LED/PWRLED1
The Power LED is light on while the system power is on. Connect the Power
LED from the system case to this pin.

14
(6) Hard disk activity LED: HD LED
This header connects to the hard disk activity indicator light on the case.
(7) Reset switch: RESET
This 2-pin header connects to the case-mounted reset switch for rebooting your
computer without having to turn off your power switch. This is a preferred
method of rebooting in order to prolong the lift of the system’s power supply.
See the figure below.
(8) Power switch: PWR BTN
This 2-pin header connects to the case-mounted power switch to power
ON/OFF the system.
System Case Connections
HDLED
RESET
VCC5
GND
VCC5 PWR LED
PWRBTN
PWRBTN PWRLED
HDDLE
RSTSW
NC GND
JW FP1
Pin 1
SPEAK1
SPKR
GND
NC
VCC5
Pin 1
PWRLED1
Pin 1
(9) HDMI-SPDIF Out header: HDMI_SPDIF1
The SPDIF output is capable of providing digital audio to external speakers or
compressed AC3 data to an external Dolby digital decoder. Use this feature only
when your stereo system has digital input function. Some of the VGA Card need
connect SPDIF-IN Connector，so its HDMI Port can make sounds .
HDMI_SPDIF Header
1
GND
2
HDMI_SPDIF_OUT
Notice: the photos used for illustration purpose in this manual are from the model
A75M, unless otherwise stated.

15
Chapter 4
Useful Help
4-1 How to Update BIOS
Solution1: Updating BIOS under DOS:
1. Prepare a bootable disk. (You may make one by click START click RUN type SYS
A: click OK)
2. Download upgrade tools and the latest BIOS files of the motherboard from official
website and then make a copy of it to your bootable floppy disk after
decompressing these files
3. Insert the disk into A: ,start your computer and then type in
“A:\xxxxxx.BAT”(xxxxxxx being the file name of the latest BIOS )
4. Type Enter to update and flash the BIOS. The system will restart automatically
when BIOS is upgraded.
Solution2: Updating BIOS under Windows operating system:
1. Download Windows version BIOS from our website.
2. Unzip the downloaded file.
3. Double click EXE file to activate it and follow on-screen instructions for further
operations.
4-2 Trouble Shooting
Problem Solution
No power to the system to the all
power light don’t illuminate, fan inside
power supply doesn’t turn on.
1. Make sure power cable is security
plugged in. 2. Replace cable. 3.
Contact technical support.
System inoperative. Keyboard lights
are on, power indicator lights are lit,
and hard drive is spinning.
Using ever pressure on both ends of
the DIMM, press down firmly until the
module snaps into places.
System doesn’t boot from hard disk
drive, can be booted from optical drive. 1. Check cable running from disk to disk controller board. .Make sure both
ends are securely plugged in, check
the drive type in the standard CMOS
setup. 2. Backing up the hard drive is
extremely important .All hard disks are
capable of breaking down at any time.
System only boots from optical
drive .Hard disk can be read and
applications can be used but booting
from hard disk is impossible.
1. Back up date and applications files.
2. Reformat the hard drive. Reinstall
applications and date using backup
disks.
Screen message says “Invalid
Configuration” or “CMOS Failure” Review system‘s equipment. Make sure correct information on is in setup.

16
Appendix
Subject 1: Regarding the Application of 3-Phase or 3+1 Phase
Power Supply Mold
As a result of the increasing power consumption demand from many
AMD CPUs in current market, we suggest not to use a CPU that
demands more than 65W power consumption at work for an AMD CPU
compliant board that comes with power supply design as 3 phase or
3+1 phase mold and MOSFET design as working in High SideX1 and
Low SideX1 mold so as to avoid MOSFET getting burned or other
phenomena like a halted system or system instability. So please take notice of the
CPU you are using and make sure that it is one that demand not more than 65 W to
ensure long-term working order.
Note：
1. The relation between CPU Power Consumption Amount and Power Phase:
depending on difference in voltage rating, one-phase of power can provide
25~30W to the motherboard.
2. 3- Phase Power Supply Mold: motherboard with 3 inductances for CPU power
supply, and each inductance carries with it 2 MOSFET (6 MOSFETs in total)
(Figure1);3+1–Phase Power Supply Mold: motherboard with 4 inductances for
CPU power supply, and each inductance carries with it 2 MOSFET (8 MOSFETs
in total) (Figure2)
Figure 1
Figure 2
Solution：
We recommend users choose motherboards with power design of 4-phase, 4+1
phase or more for CPUs that demand 89W or 95W power consumption.
We recommend users choose motherboards with power design of 5-phase, 5+1
phase or more for CPUs that demand 125W or 140W power consumption.

17
Subject 2: Suggestion on choosing electric fan
Both the amount of electric current to MOSFET and the heat produced
from the motherboard go up as AMD’s CPU power consumption
increases. In this case we recommend users select a CPU fan with air
outlet towards MOSFET so that CPU fan can carry away heat
produced by MOSFET, for better heat dissipation effects. At the same
time we suggest using well-ventilated cases to maintain temperature as 38℃
approximately inside. (38 is recommended by CPU manufactures)℃.
Figure 1---- CPU Fan can not blow off the heat produced by MOSFET. We suggest
not to using fans of this kind.
Figure 2---- CPU Fan can blow off the heat produced by MOSFET. We suggest using
fans of this kind.
Cool air flowing in
Hot air flowing out
Cool air flowing in
Hot air flowing out
MOSFET
MOSFET