DFI AK74-SC User manual

AK74-SC Rev. AF+
AK74-EC Rev. A+
AK74-EN Rev. A+
AK74-AC Rev. A+
System Board
Users Manual
43840104

Co yright
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 Jumper Settings for Clearing CMOS Data..........................................
.4 Jumper Settings for the Onboard Audio Codec
(AK74-SC/EC/AC only)..........................................................................................
.5 Jumper Settings for Selecting the CPUs Front Side Bus
(AK74-AC only).............................................................................................................
.6 Jumper Settings for Selecting the USB Power...................................
.7 Ports and Connectors.............................................................................................
Chapter 3 - Award BI S 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.....................................................................................................
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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.....................................................
Appendix A - Using the Suspend to RAM
Function
A.1 Using the Suspend to RAM Function........................................................
Appendix B - System Error Messages
B.1 POST Beep.......................................................................................................................
B. Error Messages..............................................................................................................
Appendix C - Troubleshooting
C.1 Troubleshooting Checklist....................................................................................
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Introduction

6
1.1 Features and Specifications
1.1.1 Features
Chipset
 VIA® KT133 - VT8363 and VT8 C686A (AK74-SC)
 VIA® KT133 - VT8363 and VT8 C686B (AK74-EC/EN)
 VIA® KT133A - VT8363A and VT8 C686B (AK74-AC)
Processor
The system board is equipped with Socket-A for 46 -pin PGA
processor. It is also equipped with a switching voltage regulator that
automatically detects 1.100V to 1.850V.
 AK74-SC/EC/EN
- AMD AthlonTM/DuronTM 100MHz ( 00MHz DDR) FSB pro-
cessor (600/650/700/750/800/850/900/950MHz, 1GHz,
1. GHz or future processors)
 AK74-AC
- AMD AthlonTM/DuronTM 100/133MHz ( 00/ 66MHz DDR)
FSB processor (600/650/700/750/800/850/900/950MHz,
1GHz, 1.3GHz or future processors)
System Memory
 Supports up to 1.5GB using VCM (Virtual Channel Memory) or
PC SDRAM DIMM (unbuffered or registered).
- Registered DIMM - PC-100 only.
 Three 168-pin DIMM sockets
 Uses x64 PC SDRAM, 3.3V
- PC-100 SDRAM DIMM for 100MHz memory bus
- PC-133 SDRAM DIMM for 133MHz memory bus
 L cache memory
- DuronTM processor: built-in 64KB Level pipelined burst
cache
- AthlonTM processor: built-in 56KB Level pipelined burst
cache
Chapter 1 - Introduction


Introduction
7
Expansion Slots
The AK74-SC/EC/AC system board is equipped with 1 universal
AGP slot, 4 dedicated PCI slots, 1 shared PCI/ISA slot and 1 AMR
slot.
The AK74-EN system board is equipped with 1 universal AGP slot
and 5 dedicated PCI slots.
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.
AMR (Audio/Modem Riser) is an interface designed for installing an
audio riser card, modem riser card or audio/modem riser card that
is compliant to the AMR specification.
nboard Audio Features (AK74-SC/EC/AC)
 Supports Microsoft® DirectSound/DirectSound 3D
 AC97 supported with full duplex, independent sample rate con-
verter for audio recording and playback
DIMMs
MBx64
4MBx64
8MBx64
Memory Size
16MB
3 MB
64MB
DIMMs
16MBx64
3 MBx64
64MBx64
Memory Size
1 8MB
56MB
51 MB
Note:
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 SDR M) of DIMMs may cause
problems.

Introduction

8
ATX 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 por t (AK74-SC/EC/AC)
 Three audio jacks: line-out, line-in and mic-in (AK74-SC/EC/AC)
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
(AK74-SC/EC/AC)
PCI Bus Master IDE Controller
 Two PCI IDE interfaces suppor t up to four IDE devices
 Supports ATA/33 and ATA/66 hard drives (AK74-SC)
Supports ATA/33, ATA/66 and ATA/100 hard drives
(AK74-EC/EN/AC)
 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
IrDA 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.


Introduction
9
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 ports, 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.
BI S
 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 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 par t 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

Introduction

10
Refer to the PC Health Status section in chapter 3 and the VIA
Hardware Monitor section in chapter 4 for more information.
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.
ver 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 verclocking
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.