DFI ak75-ec A+ User manual

AK75-EC
Rev. A+
System Board
Users Manual
47800106

Copyri ht
This publication contains information that is protected by copyright.
No part of it may be reproduced in any form or by any means or
used to make any transformation/adaptation without the prior
written permission from the copyright holders.
This publication is provided for informational purposes only. The
manufacturer makes no representations or warranties with respect to
the contents or use of this manual and specifically disclaims any
express or implied warranties of merchantability or fitness for any
particular purpose. The user will assume the entire risk of the use or
the results of the use of this document. Further, the manufacturer
reserves the right to revise this publication and make changes to its
contents at any time, without obligation to notify any person or
entity of such revisions or changes.
© 001. All Rights Reserved.
Trademarks
Microsoft® MS-DOS®, WindowsTM, Windows® 95, Windows® 98,
Windows® 98 SE, Windows® ME, Windows® 000 and Windows
NT® 4.0 are registered trademarks of Microsoft Corporation. AMD,
AthlonTM and DuronTM are registered trademarks of Advanced Micro
Devices, Inc. VIA is a registered trademark of VIA Technologies, Inc.
Award is a registered trademark of Award Software, Inc. Other
trademarks and registered trademarks of products appearing in this
manual are the properties of their respective holders.
Caution
To avoid damage to the system:
 Use the correct AC input voltage range.
To reduce the risk of electric shock:
 Unplug the power cord before removing the system chassis
cover for installation or servicing. After installation or servicing,
cover the system chassis before plugging the power cord.

Battery:
 Danger of explosion if battery incorrectly replaced.
 Replace only with the same or equivalent type recommend by
the manufacturer.
 Dispose of used batteries according to the battery
manufacturers instructions.
Joystick or MIDI port:
 Do not use any joystick or MIDI device that requires more than
10A current at 5V DC. There is a risk of fire for devices that
exceed this limit.
FCC and DOC Statement on Class B
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 when the equipment is operated in a residential
installation. This equipment generates, uses and can radiate radio
frequency energy and, if not installed and used in accordance with
the instruction manual, 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 into 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.
Notice:
1. The changes or modifications not expressly approved by the
party responsible for compliance could void the user's authority
to operate the equipment.
. Shielded interface cables must be used in order to comply with
the emission limits.

Table of Contents
Chapter 1 - Introduction
1.1 Features and Specifications..................................................................................
1. Package Checklist.........................................................................................................
Chapter 2 - Hardware Installation
.1 System Board Layout .............................................................................................
. System Memory.............................................................................................................
.3 CPU Frequency Ratio...............................................................................................
.4 Jumper Settings for Clearing CMOS Data..........................................
.5 Jumper Settings for the Onboard Audio Codec...........................
.6 Jumper Settings for Selecting the CPUs Front Side
Bus..............................................................................................................................................
.7 Jumper Settings for Selecting the USB Power...................................
.8 Ports and Connectors.............................................................................................
Chapter 3 - ward BIOS Setup Utility
3.1 The Basic Input/Output System.....................................................................
3.1.1 Standard CMOS Features.............................................................
3.1. Advanced BIOS Features..............................................................
3.1.3 Advanced Chipset Features ......................................................
3.1.4 Integrated Peripherals.........................................................................
3.1.5 Power Management Setup............................................................
3.1.6 PnP/PCI Configurations....................................................................
3.1.7 PC Health Status...................................................................................
3.1.8 Frequency/Voltage Control............................................................
3.1.9 Load Fail-Safe Defaults.....................................................................
3.1.10 Load Optimized Defaults..............................................................
3.1.11 Set Supervisor Password...............................................................
3.1.1 Set User Password..............................................................................
3.1.13 Save & Exit Setup.................................................................................
3.1.14 Exit Without Saving..............................................................................
3. Updating the BIOS.....................................................................................................
6
13
48
48
5
56
59
64
69
7
74
76
76
77
77
78
78
78
14
15
17
19
1
3
4

Chapter 4 - Supported Softwares
4.1 Desktop Management Interface.....................................................................
4. VIA Hardware Monitor............................................................................................
4.3 VIA Service Pack..........................................................................................................
4.4 Audio Drivers and Software Application...............................................
4.5 Drivers and Utilities Installation Notes.....................................................
ppendix - Using the Suspend to R M
Function
A.1 Using the Suspend to RAM Function........................................................
ppendix B - System Error Messages
B.1 POST Beep.......................................................................................................................
B. Error Messages..............................................................................................................
ppendix C - Troubleshooting
C.1 Troubleshooting Checklist....................................................................................
79
8
8
83
84
89
89
85
91

Introduction

6
1.1 Features and Specifications
1.1.1 Features
Chipset
 VIA® KT133A - VT8363A and VT82C686B
Processor
The system board is equi ed with Socket-A for 462- in PGA
rocessor. It is also equi ed with a switching voltage regulator that
automatically detects 1.100V to 1.850V.
 AMD AthlonTM/DuronTM 100/133MHz (200/266MHz DDR) FSB
rocessor (600/650/700/750/800/850/900/950MHz, 1GHz,
1.3GHz or future rocessors)
System Memory
 Su orts u to 1.5GB using VCM (Vir tual Channel Memory) or
PC SDRAM DIMM (unbuffered or registered).
- Registered DIMM - PC-100 only.
 Three 168- in DIMM sockets
 Uses x64 PC SDRAM, 3.3V
- PC-100 SDRAM DIMM for 100MHz memory bus
- PC-133 SDRAM DIMM for 133MHz memory bus
 L2 cache memory
- DuronTM rocessor: built-in 64KB Level 2 i elined burst
cache
- AthlonTM rocessor: built-in 256KB Level 2 i elined burst
cache
Important:
 PC-100 SDRAM DIMM is supported when used with
100MHz FSB processor.
 PC-1 SDRAM DIMM is supported when used with
100MHz FSB or 1 MHz FSB processor.
Chapter 1 - Introduction


Introduction
7
Expansion Slots
The system board is equipped with 1 universal AGP slot, 5
dedicated PCI slots and 1 CNR (Communication and Networking
Riser) slot for modem riser card only.
AGP is an interface designed to support high performance 3D
graphics cards. It utilizes a dedicated pipeline to access system
memory for texturing, z-buffering and alpha blending. The universal
AGP slot supports AGP x with up to 533MB/sec. bandwidth and
AGP 4x with up to 1066MB/sec. bandwidth for 3D graphics
applications. AGP in this system board will deliver faster and better
graphics to your PC.
Onboard udio Features
 Supports Microsoft® DirectSound/DirectSound 3D
 AC97 supported with full duplex, independent sample rate con-
verter for audio recording and playback
TX Double Deck Ports (PC 99 color-coded connectors)
 Two USB ports
 Two NS16C550A-compatible DB-9 serial ports
 One SPP/ECP/EPP DB- 5 parallel port
 One mini-DIN-6 PS/ mouse port
 One mini-DIN-6 PS/ keyboard port
 One game/MIDI port
 Three audio jacks: line-out, line-in and mic-in
DIMMs
MBx64
4MBx64
8MBx64
Memory Size
16MB
3 MB
64MB
DIMMs
16MBx64
3 MBx64
64MBx64
Memory Size
1 8MB
56MB
51 MB
 If you are using more than one DIMM, make sure you
insert the same type of DIMMs into the DIMM sockets
Using different types (VCM or PC SDRAM) of DIMMs may
cause problems

Introduction

8
Connectors
 One connector for additional external USB ports
 One connector for IrDA interface
 Two IDE connectors
 One floppy drive interface supports up to two .88MB floppy
drives
 One ATX power supply connector
 One Wake-On-LAN connector
 One Wake-On-Ring connector
 CPU, chassis and second chassis fan connectors
 Three internal audio connectors (AUX-in, CD-in and TAD)
PCI Bus Master IDE Controller
 Two PCI IDE interfaces support up to four IDE devices
 Supports ATA/33, ATA/66 and ATA/100 hard drives
 PIO Mode 3 and Mode 4 Enhanced IDE (data transfer rate up
to 16.6MB/sec.)
 Bus mastering reduces CPU utilization during disk transfer
 Supports ATAPI CD-ROM, LS-1 0 and ZIP
IrD Interface
The system board is equipped with an IrDA connector for wireless
connectivity between your computer and peripheral devices. It
supports peripheral devices that meet the HPSIR and ASKIR
standard.
USB Ports
The system board supports 4 USB ports. Two onboard USB ports
are located at the ATX double deck ports of the board. The J19
connector on the system board allows you to connect the optional
3rd and 4th USB ports. These optional USB por ts, which are
mounted on a card-edge bracket, will be provided as an option.
USB allows data exchange between your computer and a wide
range of simultaneously accessible external Plug and Play peripherals.


Introduction
9
BIOS
 Award BIOS, Windows® 95/98/ 000/ME Plug and Play compat-
ible
 Supports SCSI sequential boot-up
 Flash EPROM for easy BIOS upgrades
 Supports DMI .0 function
 Mbit flash memory
 Vcore and CPU external bus clock selectable in the BIOS
Desktop Management Interface (DMI)
The system board comes with a DMI .0 built into the BIOS. The
DMI utility in the BIOS automatically records various information
about your system configuration and stores these information in the
DMI pool, which is a part of the system board's Plug and Play
BIOS. DMI, along with the appropriately networked software, is
designed to make inventory, maintenance and troubleshooting of
computer systems easier. Refer to chapter 4 for instructions on using
the DMI utility.
1.1.2 System Health Monitor Functions
The system board is capable of monitoring the following system
health conditions.
 Monitors CPU/system temperature and overheat alarm
 Monitors 1 V/5V/3.3V/VCORE voltages and failure alarm
 Monitors CPU/chassis fan speed and failure alarm
 Automatic chassis fan on/off control
 Read back capability that displays temperature, voltage and fan
speed
Refer to the PC Health Status section in chapter 3 and the VIA
Hardware Monitor section in chapter 4 for more information.

Introduction

10
1.1.3 Intelligence
CPU Temperature Protection
The CPU Temperature Protection function has the capability of
monitoring the CPUs temperature during system boot-up. Once it
has detected that the CPUs temperature exceeded the CPU
temperature limit defined in the BIOS, the system will automatically
power-off after 5 warning beeps. Refer to CPU Temp. Prot. Function
and CPU Temp. Prot. Alarm in the PC Health Status section in
chapter 3 for more information.
CPU Fan Protection
The CPU Fan Protection function has the capability of monitoring the
CPU fan during system boot-up and will automatically power-off the
system once it has detected that the CPU fan did not rotate. This
preventive measure has been added to protect the CPU from
damage and insure a safe computing environment. Refer to CPU
Fan Connector with CPU Fan Protection Function in chapter and
CPU Fan Protection in the PC Health Status section in chapter 3
for more information.
Over Voltage
The Over Voltage function allows you to manually adjust to a higher
core voltage that is supplied to the CPU. Although this function is
supported, we do not recommend that you use a higher voltage
because unstable current may be supplied to the system board
causing damage. Refer to CPU-Vcore Select in the Frequency/
Voltage Control section in chapter 3 for more information.
CPU Overclocking
The CPU Overclocking function allows you to adjust the processors
bus clock. However, overclocking may result to the processors or
systems instability and are not guaranteed to provide better system
performance. Refer to CPU Host/PCI Clock in the Frequency/
Voltage Control section in chapter 3 for more information.


Introduction
11
utomatic Chassis Fan Off
The chassis fan will automatically turn off once the system enters the
Suspend mode.
Dual Function Power Button
Depending on the setting in the Soft-Off By PWRBTN field of the
Power Management Setup, this switch will allow the system to enter
the Soft-Off or Suspend mode.
Wake-On-Ring
This feature allows the system that is in the Suspend mode or Soft
Power Off mode to wake-up/power-on to respond to calls coming
through an internal or external modem. Refer to Wake-On-Ring
Connector in chapter and Resume On LAN/Ring (Wake Up
Events field) in the Power Management Setup section in chapter 3
for more information.
Important:
If you are using a modem add-in card, the 5VSB power source
of your power supply must support a minimum of ≥ 720mA
RTC Timer to Power-on the System
The RTC installed on the system board allows your system to
automatically power-on on the set date and time. Refer to Resume
By Alarm (Wake Up Events field) in the Power Management
Setup section in chapter 3 for more information.
Wake-On-L N
The Wake-On-LAN function allows the network to remotely wake
up a Soft Power Down (Soft-Off) PC. Your LAN card must support
the remote wakeup function. Refer to Wake-On-LAN Connector in
chapter and Resume On LAN/Ring (Wake Up Events field) in
the Power Management Setup section in chapter 3 for more
information.
Important:
The 5VSB power source of your power supply must support a
minimum of ≥ 720mA

Introduction

1
C Power Failure Recovery
When power returns after an AC power failure, you may choose to
either power-on the system manually, let the system power-on
automatically or return to the state where you left off before power
failure occurs. Refer to PWR Lost Resume State in the Power
Management Setup section in chapter 3 for more information.
CPI STR
The system board is designed to meet the ACPI (Advanced
Configuration and Power Interface) specification. ACPI has energy
saving features that enables PCs to implement Power Management
and Plug-and-Play with operating systems that support OS Direct
Power Management. Currently, only Windows® 98/ 000/ME supports
the ACPI function allowing you to use the Suspend to RAM function.
With the Suspend to RAM function enabled, you can power-off the
system at once by pressing the power button or selecting Standby
when you shut down Windows® 98/ 000/ME without having to go
through the sometimes tiresome process of closing files, applications
and operating system. This is because the system is capable of
storing all programs and data files during the entire operating session
into RAM (Random Access Memory) when it powers-off. The
operating session will resume exactly where you left off the next time
you power-on the system. Refer to Using the Suspend to RAM
Function in appendix A for more information.
Important:
The 5VSB power source of your power supply must support
≥ 1A
Virus Protection
Most viruses today destroy data stored in hard drives. The system
board is designed to protect the boot sector and partition table of
your hard disk drive.


Introduction
13
1.2 Package Checklist
The system board package contains the following items:
þThe system board
þA users manual
þOne IDE cable for ATA/33, ATA/66 or ATA/100 IDE drives
þOne 34-pin floppy disk drive cable
þOne Main Board Utility CD
If any of these items are missing or damaged, please contact your
dealer or sales representative for assistance.

14
Hardware Installation
2.1 System Board Layout
Chapter 2 - Hardware Installation

Hardware Installation
15
2.2 System Memory
Warning:
Electrostatic discharge (ESD) can damage your system board,
processor, disk drives, add-in boards, and other components Perform
the upgrade instruction procedures described at an ESD workstation
only If such a station is not available, you can provide some ESD
protection by wearing an antistatic wrist strap and attaching it to a
metal part of the system chassis If a wrist strap is unavailable,
establish and maintain contact with the system chassis throughout
any procedures requiring ESD protection
The system board is equipped with three 168-pin DIMM (Dual In-
line Memory Module) sockets that support VCM or PC SDRAM
DIMM. PC SDRAM (Synchronous Dynamic Random Access Memory)
uses a fast memory interface technology that includes using the clock
on the chip to synchronize with the CPU clock so that the timing of
the memory chips and the timing of the CPU are synchronized. This
saves time during transmission of data, subsequently increasing
system performance.
Refer to chapter 1 (System Memory section) for detailed
specification of the memory supported by the system board.

16
Hardware Installation
1. Pull the tabs which are at the ends of the socket to the side.
. Position the DIMM above the socket with the notches in the
module aligned with the keys on the socket.
3. Seat the module vertically into the socket. Make sure it is
completely seated. The tabs will hold the DIMM in place.
Pin 1
Notch
Key
Tab
Tab
2.2.1 Installing the DIM Module
A DIM module simply snaps into a DIMM socket on the system
board. Pin 1 of the DIM module must correspond with Pin 1 of the
socket.

Hardware Installation
17
2.3 CPU Frequency Ratio
CPU Frequency Ratio Select - SW1
The table above shows the available frequency ratios and their
corresponding DIP switch setting. The black rectangles on the SW1
illustration denote the part that is protruding, the adjustable switch.
Make sure SW1 is set correctly before applying power, otherwise
you will not be able to power-on the system.
Not all AMD CPUs support the multiplier overclocking function.
Please give special attention to L1 on the CPU. L1s four bridges
must be closed (short) in order for the frequency ratio selected on
SW1 to take effect. The figure below will help you identify the type
of CPU that would allow you to adjust its frequency ratio.
Ratio
Auto
5x
5.5x
6x
6.5x
7x
7.5x
8x
8.5x
9x
9.5x
10x
10.5x
11x
11.5x
1 x
1 .5x
1
Off
On
On
On
On
On
On
On
On
On
On
On
On
On
On
On
On
2
Off
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
3
Off
On
On
Off
Off
On
On
Off
Off
On
On
Off
Off
On
On
Off
Off
4
Off
Off
Off
Off
Off
On
On
On
On
Off
Off
Off
Off
On
On
On
On
5
Off
On
On
On
On
Off
Off
Off
Off
Off
Off
Off
Off
On
On
On
On
L1s four bridges closed (short).
L1s four bridges open.

18
Hardware Installation
Important:
We do not recommend that you adjust the CPU to a higher
frequency ratio because it may result to the CPUs or systems
instability and are not guaranteed to provide better system
performance If you are unable to boot up the system with the
frequency ratio you selected, please power off the system and
set SW1 pins 1-5 to Off (Auto)

Hardware Installation
19
2.4 Jumper Settings for Clearing CMOS Data
-3 On:
Clear CMOS Data
1- On: Normal
(default)
1
3
1
3
Clear CMOS Data - Jumper JP8
If you encounter the following,
a) CMOS data becomes corrupted
b) You forgot the supervisor or user password
c) You are unable to boot-up the computer system because the
processors bus clock was incorrectly set in the BIOS
you can reconfigure the system with the default values stored in the
ROM BIOS.
To load the default values stored in the ROM BIOS, please follow
the steps below.
1. Power-off the system and unplug the power cord.
. Set JP8 pins and 3 to On. Wait for a few seconds and set JP8
back to its default setting, pins 1 and On.

0
Hardware Installation
3. Plug the power cord and power-on the system.
If your reason for clearing the CMOS data is due to incorrect
setting of the processors bus clock in the BIOS, please proceed
to step 4.
4. After powering-on the system, press <Del> to enter the main
menu of the BIOS.
5. Select the Frequency/Voltage Control submenu and press
<Enter>.
6. Set the CPU Host/PCI Clock field to its default setting or an
appropriate bus clock. Refer to CPU Host/PCI Clock in the
Frequency/Voltage Control section in chapter 3 for more
information.
7. Press <Esc> to return to the main menu of the BIOS setup
utility. Select Save & Exit Setup and press <Enter>.
8. Type <Y> and press <Enter>.