MSI K8n Neo4 Manual

							2-7
Hardware Setup Memory
DIMM1~4
(from bottom to top)
The mainboard provides 4 slots for 184-pin DDR SDRAM DIMM (Double In-Line Memory
Module) modules and supports the memory size up to 4GB. You can install DDR266/
333/400 modules on the DDR DIMM slots (DDR 1~4).
For the updated supporting memory modules, please visit 
http://www.msi.com.tw/program/products/mainboard/mbd/pro_mbd_trp_list.php.
DIMM Module Combination
Install at least one DIMM module on the slots. Each DIMM slot supports up to a maximum
size of 1GB. Users can install either single- or double-sided modules to meet their
own needs. Please note that 
each DIMM can work respectively for single-
channel DDR, but there are some rules while using dual-channel DDR  (Please
refer to the suggested DDR population table below) . Users may install memory modules
of different type and density on different-channel DDR DIMMs. However, the  same
type and density memory modules  are necessary while using dual-channel DDR,
or instability may happen. Please refer to the following table for detailed dual-channel
DDR. Other combination not listed below will function as single-channel DDR. Introduction to DDR SDRAM
DDR (Double Data Rate) SDRAM is similar to conventional SDRAM, but doubles the
rate by transferring data twice per cycle.  It uses 2.5 volts as opposed to 3.3 volts
used in SDR SDRAM, and requires 184-pin DIMM modules rather than 168-pin DIMM
modules used by SDR SDRAM.  High memory bandwidth makes DDR an ideal solution
for high performance PC, workstations and servers. 
						

							2-8 MS-7125 ATX MainboardMSI Reminds You...
-Dual-channel DDR works ONLY in the 3 combinations listed in
the table as below.
-Please select the identical memory modules to install on the dual
channel, and DO NOT install three memory modules on three
DIMMs, or it may cause some failure.
-Always insert the memory modules into the GREEN slots first, and
it is strongly recommended not to insert the memory modules into
the PURPLE slots while the GREEN slots are left empty.
-This mainboard DO NOT support the memory module installed
with more than 18 pieces of IC (integrated circuit). DIMM1 (Ch A)DIMM2 (Ch B)DIMM3 (Ch A)DIMM4 (Ch B)System Density
128MB~1GB128MB~1GB256MB~2GB
128MB~1GB128MB~1GB256MB~2GB
128MB~1GB128MB~1GB128MB~1GB128MB~1GB512MB~4GBGREENPURPLE
GREENPURPLE
Recommended Memory Combination List
S: Single SideD: Double SideDDR 400 DIMM2DIMM3DIMM4
SDIMM Slots
Max Speed--
S-
D-
-
D -
- S-
SDDR 400 DDR 400
DDR 400
DDR 333 DDR 400
DDR 400
DDR 400 DDR 400
DDR 400
DDR 333 DDR 400DIMM1
-
-
-
-
-
-
S S
SS --SS
D D
D D S-S-
D-D-
DD--
--
DDGreenGreen
PurplePurple 
						

							2-9 Hardware SetupInstalling DDR Modules
1.The DDR DIMM has only one notch on the center of module. The module will only
fit in the right orientation.
2.Insert the DIMM memory module vertically into the DIMM slot. Then push it in until
the golden finger on the memory module is deeply inserted in the socket.
3.The plastic clip at each side of the DIMM slot will automatically close.VoltNotchMSI Reminds You...
You can barely see the golden finger if the module is properly in-
serted in the socket.MSI Reminds You...
1.The maximum memory speed decreases when the following two
Memory Combination is selected (you can also refer to the Rec-
ommended Memory Combination list shown in the previous page:
-Each channel is installed with two double-sided memory mod-
ules
-Both DIMM1 and DIMM3 slots are installed with double-sided
memory module.
2.Due to the South Bridge resource deployment, the system den-
sity will only be detected up to 3+GB (not full 4GB) when each
DIMM is installed with an 1GB memory module. 
						

							2-10 MS-7125 ATX MainboardPower Supply
The mainboard supports ATX power supply for the power system.  Before inserting
the power supply connector, always make sure that all components are installed
properly to ensure that no damage will be caused.
PINSIGNAL
13+3.3V
14-12V
15GND
16PS-ON#
17GND
18GND
19GND
20Res
21+5V
22+5V
23+5V
24GNDPINSIGNAL
 1+3.3V
 2+3.3V
 3GND
 4+5V
 5GND
 6+5V
 7GND
 8PWR OK
 95VSB
10+12V
11+12V
12NC Pin Definition ATX 24-Pin Power Connector: ATX1
This connector allows you to connect an SSI power supply. To connect the
SSI power supply, make sure the plug of the power supply is
inserted in the proper orientation and the pins are aligned. Then
push down the power supply firmly into the connector.
You may use the 20-pin ATX power supply or 24-pin SSI
power supply as you like. If you’d like to use the ATX power supply,
please plug your power supply along with pin 1 & pin 13 (refer to
the image at the right hand). There is also a foolproof design on pin
11, 12, 23 & 24 to avoid wrong installation.pin 12pin 13
ATX112
113 24PINSIGNAL
1GND
2GND
312V
412V  JPW1 Pin Definition ATX 12V Power Connector: JPW1
This 12V power connector is used to provide power to the CPU.MSI Reminds You...
1. These two connectors connect to the ATX power supply and have to
work together to ensure stable operation of the mainboard.
2. Power supply of 350 watts (and above) is highly recommended for
system stability.
3. For ATX 12V power connection, it should be greater than 18A.JPW1 1 34
2 
						

							2-11 Hardware SetupImportant Notification about Power Issue
NForce chipset is very sensitive to ESD (Electrostatic Discharge), therefore this
issue mostly happens while the users intensively swap memory modules under S5
(power-off) states, and the power code is plugged while installing modules. Due to
several pins are very sensitive to ESD, so this kind of memory-replacement actions
might cause system chipset unable to boot. Please follow the following solution to
avoid this situation.
Unplug the AC power cable (shown in figure 1) or unplug the ATX1 & JPW1 power
connectors (shown in figure 2 & figure 3) before the 1st installation or during   sys-
tem upgrade procedure.
Figure 1:
Unplug the AC power cable
Figure 2:
Unplug the ATX1 power connectorFigure 3:
Unplug the JPW1 power connector 
						

							2-12 MS-7125 ATX MainboardThe back panel provides the following connectors:Back PanelMouse Connector (Green) / Keyboard Connector (Purple)
The mainboard provides a standard PS/2®
 mouse/keyboard mini DIN connector for
attaching a PS/2®
 mouse/keyboard. You can plug a PS/2®
 mouse/keyboard directly
into this connector. The connector location and pin assignments are as follows:
PS/2 Mouse / Keyboard
(6-pin Female)213
45 6PINSIGNALDESCRIPTION
1Mouse/Keyboard  DataMouse/Keyboard  data
2NCNo connection
3GNDGround
4VCC+5V
5Mouse/Keyboard ClockMouse/Keyboard clock
6NCNo connection  Pin Definition Keyboard
COM PortUSB Ports
L-Out
Mic L-In
MouseParallel
LAN
1394 Port
(Optional)   SPDIF
    Out
(Coaxial)RS-Out
CS-Out
SPDIF Out
(Optical) 
						

							2-13 Hardware SetupIEEE1394 Port (Optional)
The back panel provides one standard IEEE 1394 port. The standard IEEE1394 port
connects to IEEE1394 devices without external power. The IEEE1394 high-speed
serial bus complements USB by providing enhanced PC connectivity for a wide range
of devices, including consumer electronics audio/video (A/V) appliances, storage
peripherals, other PCs, and portable devices.IEEE1394 PortUSB Connectors
The mainboard provides two OHCI (Open Host Controller Interface) Universal Serial
Bus roots for attaching USB devices such as keyboard, mouse or other USB-com-
patible devices. You can plug the USB device directly into the connector.
USB Ports1     2     3     4
5     6     7     8PINSIGNALDESCRIPTION
1VCC+5V
2-Data 0Negative Data Channel 0
3+Data0Positive Data Channel 0
4GNDGround
5VCC+5V
6-Data 1Negative Data Channel 1
7+Data 1Positive Data Channel 1
8GNDGroundUSB Port Description Serial Port Connector
The mainboard offers one 9-pin male DIN connector as the serial port.  The port is a
16550A high speed communication port that sends/receives 16 bytes FIFOs.  You
can attach a serial mouse or other serial devices directly to the connector.
PINSIGNALDESCRIPTION
1DCDData Carry Detect
2SINSerial In or Receive Data
3SOUTSerial Out or Transmit Data
4DTRData Terminal Ready)
5GNDGround
6DSRData Set Ready
7RTSRequest To Send
8CTSClear To Send
9RIRing IndicatePin Definition
     9-Pin Male DIN Connector1    2    3    4    5
6    7    8    9 
						

							2-14 MS-7125 ATX Mainboard
LAN (RJ-45) Jack
The mainboard provides one standard RJ-45 jacks for connection to single Local
Area Network (LAN). This Giga-bit LAN enables data to be transferred at 1000, 100
or 10Mbps. You can connect a network cable to either LAN jack.
Audio Port Connectors
The left 3 audio jacks are for 2-channel mode for stereo speaker output: Line Out is
a connector for Speakers or Headphones. Line In is used for external CD player,
Tape player, or other audio devices. Mic is a connector for microphones.
However, there is an advanced audio application provided by Realtek ALC850 to
offer support for 7.1-channel audio operation and can turn rear audio connectors
from 2-channel to 4-/5.1-/7.1 channel audio.S/PDIF Out-CoaxialRear Speaker Out
 (in 7.1CH / 6CH / 4CH)Line Out Line In
( in 7.1CH / 6CH)
MICCenter/Subwoofer
Speaker Out
( in 7.1CH / 6CH)
S/PDIF Out-Optical
(in 7.1CH / 6CH)Giga-bit LAN Pin Definition
PINSIGNALDESCRIPTION
1D0PDifferential Pair 0+
2D0NDifferential Pair 0-
3D1PDifferential Pair 1+
4D2PDifferential Pair 2+
5D2NDifferential Pair 2-
6D1NDifferential Pair 1-
7D3PDifferential Pair 3+
8D3NDifferential Pair 3-RJ-45 LAN Jack 
						

							2-15 Hardware SetupParallel Port Connector: LPT1
The mainboard provides a 25-pin female centronic connector as LPT.  A parallel port
is a standard printer port that supports Enhanced Parallel Port (EPP) and Extended
Capabilities Parallel Port (ECP) mode.131
14
25
PINSIGNALDESCRIPTION
1STROBEStrobe
2DATA0Data0
3DATA1Data1
4DATA2Data2
5DATA3Data3
6DATA4Data4
7DATA5Data5
8DATA6Data6
9DATA7Data7
10ACK#Acknowledge
11BUSYBusy
12PEPaper End
13SELECTSelect
14AUTO FEED#Automatic Feed
15ERR#Error
16INIT#Initialize Printer
17SLIN#Select In
18GNDGround
19GNDGround
20GNDGround
21GNDGround
22GNDGround
23GNDGround
24GNDGround
25GNDGround Pin Definition 
						

							2-16 MS-7125 ATX MainboardThe mainboard provides connectors to connect to FDD, IDE HDD, case, LAN, USB
Ports, IR module and CPU/System FAN.
Floppy Disk Drive Connector: FDD1
The mainboard provides a standard floppy disk drive connector that supports 360K,
720K, 1.2M, 1.44M and 2.88M floppy disk types.Connectors
FDD1Fan Power Connectors: CPUFAN1 / SFAN1 / SFAN2 / NBFAN1
The CPUFAN1 (processor fan), SFAN1 (system fan 1), SFAN2 (system fan 2) and
NBFAN1 (NorthBridge Chipset fan) support system cooling fan with +12V. It supports
three-pin head connector. When connecting the wire to the connectors, always take
note that the red wire is the positive and should be connected to the +12V, the black
wire is Ground and should be connected to GND. If the mainboard has a System
Hardware Monitor chipset on-board, you must use a specially designed fan with
speed sensor to take advantage of the CPU fan control.
SFAN2NBFAN1+12V GND
SensorCPUFAN1SENSOR +12VGND
SFAN1+12V GNDMSI Reminds You...
1.Always consult the vendors for proper CPU cooling fan.
2.CPUFAN1 supports fan control. You can install Core Center util-
ity that will automatically control the CPU fan speed according to
the actual CPU temperature.
3. Please refer to the recommended CPU fans at AMD®
 official
website.+12VGNDNC
SENSOR