VIA Technologies KM400 User manual

TRADEMARK
All products and company names are trademarks or registered
trademarks of their respective holders.
These specifications are subject to change without notice.
Manual Revision 1.0
June 06, 2003
VIAVIA
VIAVIA
VIA KM400KM400
KM400KM400
KM400 mainboardmainboard
mainboardmainboard
mainboard
for AMD Socket A processorfor AMD Socket A processor
for AMD Socket A processorfor AMD Socket A processor
for AMD Socket A processor
User’User’
User’User’
User’ss
ss
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ManualManual
ManualManual
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6000002MM+100

DISCLAIMER OF WARRANTIES:
THERE ARE NO WARRANTIES WHICH EXTEND BEYOND THE
DESCRIPTION ON THE FACE OF THE MANUFACTURER LIMITED
WARRANTY. THE MANUFACTURER EXPRESSLY EXCLUDES ALL
OTHER WARRANTIES, EXPRESS OR IMPLIED, REGARDING ITS
PRODUCTS; INCLUDING ANY IMPLIED WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
NONINFRINGEMENT. THIS DISCLAIMER OF WARRANTIES SHALL
APPLY TO THE EXTENT ALLOWED UNDER LOCAL LAWS IN THE
COUNTRY PURCHASED IN WHICH LOCAL LAWS DO NOT ALLOW OR
LIMIT THE EXCLUSION OF THE IMPLIED WARRANTIES.

Table of Contents
Section 1 Introduction
Package Contents ................................................ 1-1
Overview
AthlonTM Processors ............................................ 1- 2
Accelerated Graphics Port ................................... 1- 3
Ultra A A66/100/133 ............................................ 1- 3
Hardware Monitoring ........................................... 1- 3
LAN (Optional)..................................................... 1- 3
Serial A A (Optional) ........................................... 1- 3
Mainboard Form-Factor ....................................... 1- 4
I/O Shield Connector ............................................ 1- 5
Power-On/Off (Remote) ........................................ 1- 5
System Block Diagram .......................................... 1-6
Section 2 Features
Mainboard Features ............................................. 2-1
Section 3 Installation
Mainboard Layout ............................................... 3- 2
Easy Installation Procedure
CPU Insertion ...................................................... 3-3
Jumper Settings ................................................... 3-5
System Memory Configuration ............................ 3- 6
Expansion Slots .................................................... 3- 8
Device Connectors ............................................... 3- 10
S R (Suspend o RAM) Function....................... 3- 15
CPU Overheating Protection ................................ 3- 16
Page

Section 4 Award BIOS Setup
BIOS Instructions................................................. 4-1
Standard CMOS Setup ......................................... 4-2
Advanced BIOS Features..................................... 4-3
Advanced Chipset Features ................................ 4-8
Integrated Peripherals .......................................... 4-13
Power Management Setup ................................... 4-18
PNP/PCI Configuration Setup .............................. 4-23
PC Health Status .................................................. 4-25
Power BIOS Features............................................ 4-27
Defaults Menu ..................................................... 4-28
Supervisor/User Password Setting ...................... 4-29
Exit Selecting ........................................................ 4-30
Section 5 Driver Installation
Easy Driver Installation ........................................ 5-1
Realtek Sound Manager Quick User-guide .......... 5-2
Appendi Appendi A
Realtek Media Player Users Guide ...................... A-1
Appendi B
Update Your System BIOS ................................... B-1
Appendi C
EEPROM BIOS Remover ..................................... C-1
Appendi D
GHOS 7 Quick Users Guide (Optional) .............. D-1

Introduction
Page 1-1
B
A
C
D
USERS
MANUAL
E
or
F
HI
Section 1
INTRODUCTION
Package Contents
Contents
A. Mainboard
B. Users manual
C. Floppy drive cable
D. HDD ribbon cable
E. CD and diskette (drivers and
utilities
F. I/O Shield
Deluxe Pack Items
G. S-ATA data and power cables
Other Optional Items
H. Extra USB2.0 port cable
I. S/PDIF Module
G
If you need the other optional item,
please contact your dealer for
assistance.

Introduction
Page 1-2
AthlonTM Processors
The AMD AthlonTM is a seventh-generation micro architecture with an integrated
L2 cache, which is powerful enough to support the bandwidth requirements of a
large range of applications, hardware, graphics, and memory technologies. These
processors implement advanced design techniques such as:
Socket A (PGA 462
266/333MHz system interface based on the Alpha EV6 bus protocol.
Three out-of-order, superscalar, pipelined Multimedia Units.
Three out-of-order, superscaler, pipelined Integer Units.
Fixed-sized internal instruction formats (MacroOPs .
72-entry Instruction Control Units.
AMD enhanced 3DNow! technology
L1 and L2 caches.
Dynamic branch prediction.
Socket A is the name for AMDs new socketed interface designed to support AMD
AthlonTM processors. This innovation is made possible by integrating the L2 cache
memory on chip with the processor. Socket A will help enable smaller enclosures,
and ultimately result in a wider variety of solutions in the market.
The AthlonTM processors in the Socket A format continue to deliver the ultimate
performance for cutting-edge applications. They bring to desktop systems running
industry-standard x86 software superscalar RISC performance. Being provided in
the Socket A format they are the worlds most powerful x86 processors. They easily
deliver the highest integer, floating-point, and 3D multimedia performance for
applications running on x86 platforms around.
It features full-speed, on-chip cache memory, a 266/333MHz front side system bus,
and enhanced 3DNow! technology. The AMD AthlonTM processor is targeted at
the performance segment, and as such will have more cache memory and higher
clock speeds.

Introduction
Page 1-3
Accelerated Graphics Port (AGP)
The AGP slot on the board is compliant with the new AGP 3.0 specification. This
new specification enhances the functionality of the original AGP specification by
allowing 8X data transfers ( 8 data samples per clock resulting in maximum band-
width of 2.1GB/s. In addition, it defines 1.5 volt power supply operation. Complying
with this specification, this board supports external AGP-8X/4X cards with Fast
Write Transactions. Only 1.5V AGP cards are supported.
Ultra ATA/66/100/133
This mainboard provides two independent ATA133 IDE controllers, supporting
standard programmable input/output (PIO and Direct Memory Access (DMA
mode operations, as well as UltraDMA-133/100/66/33 standards for a maximum data
transfer rate of 133MB/sec per channel.
Hardware Monitoring
Hardware monitoring enables you to monitor various aspects of the system operation
and status. The features include CPU temperature, voltage and fan speed in RPMs.
LAN (Optional)
This mainboard is optionally mounted with a LAN chipset. It allows the mainboard to
connect to a local area network by means of a network hub.
Serial ATA (Optional)
The evolutionary serial ATA interface replaces the standard parallel ATA physical
storage interface. The serial ATA specification provides scalability and allows
future enhancements to the computing platform. Serial technology overcomes
performance limits of parallel interface architecture, meeting the escalating need for
faster data throughput in servers and storage devices.
Serial ATA is completely software compatible with parallel ATA, requiring no
modification to your operating system. The serial ATA interface cable requires lower
voltages and uses smaller cable connectors, providing ease of installation. You can
easily upgrade storage devices that are compatible with the serial ATA interface
specification.

Introduction
Page 1-4
Mainboard Form-Factor
This board is designed with M-ATX form factor - the latest industry standard for
chassis design. The M-ATX form factor is essentially a Baby-AT baseboard
rotated 90 degrees within the chassis enclosure and a new mounting configura-
tion for the power supply. With these changes the processor is relocated away
from the expansion slots, allowing them all to hold full length add-in cards. M-
ATX defines a double height aperture to the rear of the chassis which can be
used to host a wide range of onboard I/O. Only the size and position of this
aperture is defined, allowing PC manufacturers to add new I/O features (e.g.; TV
input, TV output, joystick, modem, LAN, audio, etc. to systems. This will help
systems integrators differentiate their products in the marketplace, and better
meet your needs.
 By integrating more I/O down onto the board and better positioning the hard
drive and floppy connectors, material cost of cables and add-in cards are
reduced.
 By reducing the number of cables and components in the system, manufac-
turing time and inventory holding costs are reduced and reliability will
increase.
 By using an optimized power supply, it's possible to reduce cooling costs
and lower acoustical noise. An ATX power supply, which has a side-
mounted fan, allows direct cooling of the processor and add-in cards making
a secondary fan or active heatsink unnecessary in most system applications.
PCI slots
Expandable I/O
Figure 2: Summary of ATX chassis features
CPU socket
Single chassis
fan for system
AT X
Power
Supply ATX power connector
IDE connectors
AGP slot
3 1/2-inch
Bay
5 1/4-inch
Bay
Floppy
connector

Introduction
Page 1-5
Power-On/Off (Remote)
This board has a 20-pin ATX power supply connector (Figure 4 . For power
supplies that support the Remote On/Off feature, this should be connected to the
mainboard front panel PW_ON connector for the computer power On/Off button.
This board has been designed with Soft Off" function. You can turn off the system
in two ways: by pressing the front panel power On/Off button or using the "Soft
Off" function that can be controlled by an operating system such as Windows®XP/
ME/2000/98.
Note: For maintaining the DDR SDRAM power during STR (ACPI S3) fun tion, it is
strongly re ommended to use power supplies that have a +5VSB urrent of (>
=) 2A. Please he k the 5VSBs spe ifi ation printed on the power supplys
outer ase.
Note: The board requires a minimum of 250 Watt power supply to operate. Your
system onfiguration (amount of memory, add-in ards, peripherals, et .) may
ex eed the minimum power requirement but to ensure that adequate power is
provided, use a 300 Watt (or greater) power supply.
I/O Shield Connector
The board is equipped with an I/O back panel (Figure 3 . Ensure that your computer
case has the appropriate I/O cutout.
Figure 3: I/O ports
PW-ON
Case (chassis) Po er ON/OFF button (PW-ON)
Figure 4: Simple ATX po er ON/OFF controller
20-pin
POWER SUPPLY
COM1
Parallel Port
VGA1
RJ-45 LAN
(Optional)
USB2 0
ports
USB2 0
ports
PS/2
Mouse
PS/2
Keyboard Mic-in/Center&Subwoofer (Pink)
Line-out/Front out (Green)
Line-in/Rear out (Blue)

Introduction
Page 1-6
Figure 5: System Block Diagram
System Block Diagram

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Page 2-1
Section 2
FEATURES
Mainboard Features
Processor
Supports 462-pin Socket A for AMD Athlon XP processors with 266/333MHz
Front Si e Bus
- Athlon XP (1500+ to 3000+) with 266/333MHz Front Si e Bus,
Chipset
VIA KM400 AGPset : VIA KM400 + VT8235 or VT8237
- Embe e VIA Unichrome graphics core
Main Memory
Two 184-pin DDR DIMM sockets for 64-bit, Unbuffere , Single/Double-
si e an Non-ECC DDR-266/333 DIMMs
Supports up to 2GB memory size
BIOS
Flash EEPROM with Awar BIOS
- ACPI v2.0 compliant
- S3 (Suspen to DRAM) sleep-state support
- SMBIOS (System Management BIOS) v2.2 compliant
- Supports Power failure recovery
- Capable to wake the computer from specific states by LAN, Power
switch, PME#, RTC alarm, USB, PS2 KB&Mouse, Mo em ring on COM#1
Onboard PCI Devices
LAN --> Embe e 10/100Mbps Fast Ethernet controller with onboar
VIA 6103 PHY
IDE --> Embe e IDE controller with 2 or inary IDE ports up to 4 IDE
evices, supports ATA-133 with up to 133MB/sec ban wi th
(Optional)

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Page 2-2
Legacy IO Controller
Winbon W83697HF LPC IO controller for floppy, printer, serial an CIR/
SIR interface
udio
Six channel au io with analog an igital output using Realtek ALC655
AC97 CODEC
- AC97 v2.3 compliant
- In 2-CH mo e, supports Line-In (Blue), Line-Out (Green) an Mic-In
(Pink) at rear panel
- In 6-CH mo e, supports Rear speaker out (Blue), Front speaker out
(Green) an Center&Subwoofer speaker out (Pink) at rear panel
- Supports CD-In, Aux-In an S/PDIF-in/out interface
- Supports Line-out an Mic-In for front panel
- Supports automatic jack-sensing
Peripheral Interfaces
)At Rear Panel
PS/2 keyboar an mouse ports
One Parallel (printer) port
One Serial port
One VGA port
One RJ45 LAN connector (Optional)
Four USB2.0 ports
Three Au io jacks
)Onboar connector an pin-hea er
One floppy rive connector
Two IDE connectors
Two extra USB2.0 ports (Optional four extra USB2.0 ports by VIA VT8237)
One CD-IN an One AuX-IN connector

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Page 2-3
One S/PDIF in/out connector
One IR connector
One Front Panel Au io connector
Two S-ATA connectors by VIA VT8237 chip (Optional)
Two Fan connectors
Front Panel Controller
Supports Reset & Soft-Off switches
Supports HDD & Power LEDs
Supports PC speaker
Expansion Slots
One AGP slot supporting 1.5v 4X/8X AGP car s
- AGP v3.0 compliant
Three PCI slots with Bus Master support
- PCI v2.2 compliant
Other Features
Magic Health  a BIOS H/W monitoring utility for voltage, temperature an
fan-spee sensing isplaye uring POST
EZ Boot  A simple shortcut to select the boot evice, e.g. har rive, CD-
ROM or floppy without entering CMOS setup
Supports exclusive KBPO (Keyboar Power On) function
Excellent Over clocking capabilities through
- subtle frequency tuning on FSB
- supports complete Asynchronous FSB/Memory for overclocking
CPU Overheating Protection
Form Factor
244mm x 220 mm Micro ATX size

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Page Left Blank

Installation
Page 3-1
Section 3
INSTALLATION

Installation
Page 3-2
Mainboard Layout
Figure 1

Installation
Page 3-3
Easy Installation Procedure
The following must be completed before powering on your new system:
3-1. CPU Installation
3-2. Jumper Settings
3-3. System Memory Configuration
3-4. Expansion Slots
3- . Device Connectors
3-1 CPU Installation
CPU Insertion: (use AMD AthlonTM as reference
Step 1
Open the socket by raising the actuation
lever.
Step 2
Insert the processor.
Ensure proper pin 1 orientation by aligning
the FC-PGA corner marking with the
socket corner closest to the actuation arm
tip. The pin field is keyed to prevent mis-
oriented insertion.
Dont force processor into socket. If it does
not go in easily, check for mis-orientation
and debris.
Make sure the processor is fully inserted
into the socket on all sides.
Figure 2
Figure 3

Installation
Page 3-4
Step 3
Close the socket by lowering and
locking the actuation lever.
Figure 4
Figure 5
Step 4
Thermal compound and qualified heatsink recommended by AMD are a must to
avoid CPU overheat damage. For more information about installing your CPU,
please refer to the AMD website article Socket A AMD processor and Heatsink
Installation Guide http://www.amd.com/products/cpg/athlon/pdf/23986.pdf.

Installation
Page 3-5
3-2 Jumper Settings
1
JCK1/
JCK2:
JCMOS:
Settings:
1-2: Normal(Default)
2-3: ClearCMOS
Clear CMOS data Jumper
If the CMOS data becomes corrupted or
you forgot the supervisor or user
password, clear the CMOS data to
reconfigure the system back to the
default values stored in the ROM BIOS.
1
1
CPU FSB Select Jumper
This jumper is used to select the front side
bus of the CPU installed on the mainboard.
JCK1 JCK2 Settings:
1-2 1-2 100MHz(Default)
2-3 1-2 133MHz
2-3 2-3 166MHz
Note: Overclocking may result to the CPUs or
systems instability and are not guaranteed to
provide better system performance.
To C OS Clear data, please follow the steps below.
1. Turn off the system.
2. Change the jumper from 1-2 to 2-3 position for
a few seconds.
3. Replace the jumper on to the 1-2 position.
4. Turn on the system and hold down the <Del> key
to enter BIOS setup.
JCK1
JCK2

Installation
Page 3-6
NOTES:
 Using non-compliant memory with higher bus speeds
(overclocking) may severely compromise the integrity of the
system.
<Figure 6>
<Table 1>
3-3 System Memory Configuration
Memory Layout
The mainboard accommodates two PC2100/PC2700 184-pin DIMMs (Dual In-line
Memory Modules :
 Supports up to 2.0GB of 266/333MHz DDR SDRAM
 Supports up to 2 DDR DIMMs (refer to Table 1
 Supports unbuffered and non-ECC DIMMs
 Supports configurations defined in the JEDEC DDR DIMM specification
Figure 6 and Table 1 show two possible memory configurations.
DDR DIMM 1
DDR DIMM 2
yromeMlatoT 1MMIDRDD 2MMIDRDD
BG1=
mumixaM
*MARDSRDD
,BM215,BM652,BM821,BM46
1X*BG1
enoN
BG2=
mumixaM
*MARDSRDD
,BM215,BM652,BM821,BM46
1X*BG1
*MARDSRDD
,BM215,BM652,BM821,BM46
1X*BG1