TYAN S1846 TSUNAMI ATX User Manual
Tyan S1846
Tsunami ATX
Motherboard Users Manual
Revision 1.60-01
Copyright © Tyan Computer Corporation, 1999. All rights reserved. No part of this
manual may be reproduced or translated without prior written consent from Tyan
Computer Corp.
All registered and unregistered trademarks and company names contained in this
manual are propery of their respective companies including, but not limited to the
following.
AMIBIOS is a trademark of American Megatrend Incorporated.
Windows is a trademark of Microsoft Corporation.
IBM, PC, AT, PS/2 are trademarks of IBM Corporation.
INTEL, Pentium II, Pentium III, Celeron are trademarks of Intel Corporation.
S1846 Tsunami and Tsunami-ATX are trademarks of TYAN Computer Corporation.
Information contained in this publication has been carefully checked for accuracy and
reliability. In no event will Tyan Computer be held liable for any direct or indirect,
incidental or consequential damage, loss of use, loss of data, or other malady resulting
from errors or inaccuracies of information contained in this manual. The information
contained in this document is subject to change without notice.
PRINTED IN TAIWAN .
Table of Contents
1. Introduction................................................................................................. 4
Overview........................................................................................... 4
Icons................................................................................................. 5
Hardware Specifications/Features................................................ 5
Software Specifications.................................................................. 7
Technical Support........................................................................... 7
Returning Merchandise for Service............................................. 8
2. Board Installation..................................................................................... 10
Unpacking....................................................................................... 10
Precautions...................................................................................... 10
Installation Steps............................................................................ 11
What is a Jumper?.......................................................................... 12
Map of Motherboard Jumpers..................................................... 13
Picture of Motherboard Features................................................ 14
Setting Jumpers.............................................................................. 15
Mounting the Motherboard in the Chassis............................... 18
Installing Memory.......................................................................... 19
Installing the CPU and Cooling Fan............................................ 23
Connecting IDE and Floppy Drives............................................ 30
Connecting the Power Supply...................................................... 32
Installing Add-on Cards................................................................ 33
Connecting PS/2, USB, Serial & Parallel Devices...................... 34
Frequently Asked Questions....................................................... 35
3. BIOS Configuration................................................................................. 36
Main Setup...................................................................................... 37
Advanced CMOS Setup.............................................................. 42
Chipset Setup.................................................................................. 47
Power Management Setup............................................................ 53
Plug and Play/PCI Setup............................................................... 57
Peripheral Setup............................................................................. 62
Supervisor and User Security...................................................... 66
Language Utility............................................................................. 67
Flash Writer Utility......................................................................... 67
4. System Resources.................................................................................... 68
Beep Codes..................................................................................... 68
Troubleshooting System Problems............................................. 69
POST Checkpoint Codes.............................................................. 70
Displayed Error Messages.......................................................... 77
Appendix 1 - CPU Retention Module Options.......................................... 80
Appendix 2 - Glossary.................................................................................. 82
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Chapter 1
Introduction
Overview
The S1846 (S1846S and S1846SLA) Tsunami ATX is a quality, high performance motherboard designed for Intel Pentium II & P-III microprocessors. This
motherboard utilizes the Intel 440BX AGPset and can support CPU speeds of
233MHz through 500MHz, and host bus speeds of 66MHz to 100MHz.
The S1846 motherboard, with built-in AGP slot, provides high performance
capabilities that are ideal for a wide range of demanding applications such as
CAD, CAM, CAE, desktop publishing, 3D animation, and video production.
This integrated system board achieves high reliability with numerous features
and yet is small enough to be supported in an ATX form factor. Some of the
features included are onboard dual channel PCI PIO, BUS Master IDE and
UltraDMA/33, onboard floppy controller, and onboard high speed I/O.
Flexibility and expandability have been designed into the Tsunami ATX. With
I/O and drive controller support built onboard, the one AGP slot, five PCI and
two ISA slots (one shared, seven usable) are free for numerous add-on
expansion cards.
Remember to take a look at TYAN Computers web site located at
http://www.tyan.com. There you can find information on all of TYANs
chapter 1
Introduction
S1846 Tsunami ATX
5
INTRO
products along with FAQs, distributors list, drivers, and BIOS setting explanations.
Icons
In order to help you navigate this manual and set up your system, we have
added several icons to our format.
This icon alerts you to particularly important details regarding the
setup or maintenance of your system. This icon often appears next
to information that may keep you from damaging your board or
system. While we will often point out the most vital paragraphs in a
chapter, you should always read every word in the text. Failing to do so can
lead to exasperation and expense.
Wherever possible, we have included step-by-step instructions for
setting up your system, which are indicated by this icon. However, it
is in your best interest to read an entire section (and perhaps the
entire manual) before you begin to fiddle with your motherboard.
While we have alerted you to potential dangers in several places in
the manual with this icon, these warnings should not be regarded as
the whole of your safety regimen. Never forget that computers are
electrical devices, and are capable of delivering a shock. Prevent
damage to yourself and to your board: always ensure that your system is
turned off and unplugged whenever you are working with it, and that you are
equipped with a static safety device.
Hardware Specifications/Features
Processor Information One SEC slot (Slot 1 type)
66MHz to 100MHz bus support
(BIOS selectable)
Pentium II or Pentium III, 233-500MHz
Supports Celeron CPUs
Chipset Information Intel 440BX AGPset
Intel PIIX4e controller
!
important!
procedure
1.
2.
3.
warning
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Chapter 1
Introduction
National 309 Super I/O chipset
Voltage and Power ATX power supply connector
Information +12V power source for DC fan onboard
3.3V DRAM support
Utilizes GTL+ bus to reduce power
consumption and EMI
Main Memory Up to 768MB onboard
Three 168-pin DIMM sockets
Supports 100MHz SDRAM with SPD
System Management Optional National LM79 and LM75 ASICs
with onboard alarm for monitoring temperature,
supply voltages, and fan speed
Intel LANDesk Client Manager software
(optional with LM79 installed)
Chassis intrusion detection capable
Expansion Slots One 32-bit AGP slot
Five 32-bit PCI Bus Master slots
Two 16-bit ISA slots
One shared ISA-PCI / seven usable slots
Physical Dimensions ATX design
12 inches x 8.25 inches
S1846S requires Intel Venus
compatible I/O shield
S1846SLA requires Intel Caveman compatible
I/O shield
BIOS Information AMI Plug and Play flash BIOS
Deep Green, Energy Star, ACPI, Year 2000, and
PC98 compliant
Soft power-down, multiple boot
options
Win98/NT5 ready, DMI 2.0 compliant
PCI 2.1, APM 1.1 compliant
Disk Drive & System I/O Two PCI bus mastering EIDE
S1846 Tsunami ATX
7
INTRO
channels
Supports EIDE CD-ROMs
PIO Mode 3 & 4 (up to 17MB/sec DTR)
UltraDMA/33 bus mastering mode (up to
33MB/sec DTR)
Support for two floppy drives (up to 2.88MB)
Two serial ports (16550 UARTs)
One ECP/EPP parallel port
One IR (InfraRed) I/O interface port
Two USB rev 1.2 (universal serial bus)
connectors
One PS/2 mouse connector
One PS/2 keyboard connector
Ensoniq ES 1371 AudioPCI AC97 Codec
(S1846SLA only) Uses a single, shared IRQ
High performance PCI bus master
Spatial enhanced 3D sound (SWS)
Wavetable synthesis built in
Joystick, Audio in, Speaker, Microphone
connectors
Warranty 3 year manufacturers warranty
Software Specifications
OS Operates with MS-DOS, Windows 3.x,
Windows for WorkGroup 3.x, Windows 95,
Windows 98, Windows NT, OS/2, Novell
Netware, Solaris, and SCO Unix
Technical Support
If a problem arises with your system, you should turn to your dealer for help
first. Your system has most likely been configured by them, and they should
have the best idea of what hardware and software your system contains.
Hence, they should be of the most assistance. Further, if you purchased your
system from a dealer near to you, you can actually bring your system in to
them to have it serviced, instead of attempting to do so yourself (which can
have expensive consequences).
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Chapter 1
Introduction
Help resources:
1. See FAQ and beep codes sections of this manual.
2. See Tyan web site for FAQ, bulletins, driver updates, etc.
http://www.tyan.com
3. Contact your dealer or distributor for help BEFORE calling Tyan.
4. Email Tyan tech support: techsupport@tyan.com
5. Call Tyan tech support: 510-440-8808
Returning Merchandise for Service
During the warranty period, contact your distributor or system vendor FIRST
for any product problems. This warranty only covers normal customer use and
does not cover damages incurred during shipping or failure due to the
alteration, misuse, abuse, or improper maintenance of products.
For Resellers Only:
A receipt or copy of your invoice marked with the date of purchase is required
before any warranty service can be rendered. You can obtain service by calling
the manufacturer for a Return Merchandise Authorization (RMA) number. The
RMA number should be prominently displayed on the outside of the shipping
carton and the package should be mailed prepaid, or hand-carried to the
manufacturer. TYAN will pay to have the board shipped back to you.
S1846 Tsunami ATX
9
INTRO
This page left blank intentionally.
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Chapter 2
Board Installation
chapter 2
Board Installation
!
important!
Unpacking
The motherboard package should contain the following:
(1) S1846S(LA) mainboard
(1) 40-pin IDE and 34-pin floppy cable pack
(1) S1846 Users Manual
(1) CPU Retention module
(1) Driver Disk (S1846S only)
(1) System Management & Driver CD with Ensoniq AudioPCI manual and
installation instructions (1846SLA only)
Precautions
Whats the first thing I should do?
The first thing you should do is read this users manual. It contains important
information which will make configuration and setup much easier.
Here are some precautions you should follow when installing your
motherboard:
(1) Ground yourself properly before removing your motherboard
from the antistatic bag. Unplug the power from your computer
and then touch any metal part on the computer case. (Or wear a
grounded wrist strap.)
S1846 Tsunami ATX
11
INSTALL
(2) Hold the motherboard by its edges and do not touch the bottom of
the board.
(3) Avoid touching motherboard components, IC chips, connectors,
and leads.
(4) Avoid touching pins of memory modules and chips.
(5) Place motherboard on a grounded antistatic surface or on the
antistatic bag.
Having reviewed the precautions above, the next step is to take the motherboard out of the cardboard box and static bag, hold it by its edges, and place it
on a grounded antistatic surface, component side up. Inspect the board for
damage.
DO NOT APPLY POWER TO THE BOARD IF IT HAS BEEN DAMAGED!
Press down on any of the socket ICs if it appears that they are not properly
seated (the board should still be on an antistatic mat). Do not touch the bottom
of the board. Remember, dont take any electronic device out of its protective
bag until you are ready to actually install it into the computer case. If you do
not ground yourself, you risk zapping the motherboard or adapter card.
Subsequent problems may not arise immediately because electrostatic discharge damage, unlike physical damage, causes the device to fail over time.
*Power Supply Requirement: ATX Power Supply should be 2.01 compliant.
Standby current must be 750mA or higher (SB5V = 0.75A)
Installation Steps
You are now ready to install your motherboard. The mounting hole pattern of
the Tsunami ATX matches the ATX system board specifications. Your chassis
should be able to accomodate an ATX motherboard and have an ATX power
supply.
1. Set Jumpers
2. Mount Motherboard in Chassis
3. Install Memory
4. Install CPU & Cooling Fan
5. Connect IDE and Floppy Drives
6. Connect Power Supply
7. Install Add-on Cards
8. Connect PS/2, USB, Serial and Parallel Devices
warning
procedure
1.
2.
3.
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Chapter 2
Board Installation
2 pin jumpers
off on
3 (or more) pin jumpers
1-2 2-3 open
1
2
3
1
2
3
1
2
3
Figure 2-1
Figure 2-2
What is a Jumper?
In this manual, the terms closed and on are used when referring to jumpers
(or jumper pins) that are active; open and off are used when referring to
jumpers (or jumper pins) that are inactive. See the Figure 2-1 for examples of
on and off pins and jumpers. The square pin in the diagram is Pin 1.
Jumpers and pins are connected by slipping the blue plastic jumper connector
overtop of two adjacent jumper pins (indicated by 1-2 or 2-3). The metal rod
inside the plastic shell bridges the gap between the two pins, completing the
circuit. See Figure 2-2 for more examples of pin connections.
The tables and maps on the following pages will help you set the jumpers for
CPU speed, Infrared, and external connector pin assignments, among others.
The miniature motherboard maps will help you locate the jumpers on your board.
A full-page map of the motherboard can be found on the next two pages.
S1846 Tsunami ATX
13
INSTALL
Map of Motherboard Jumpers
The tiny 1s next to jumpers of 3 pins or more indicate the position of pin 1
for that jumper.
JP10
JP11
JP12
JP13
USB1
Keyboard
USB2
Mouse
DIMM bank 2
DIMM bank 3
DIMM bank 1
Primary IDE connector
3 volt
lithium
battery
COM2
COM1
Printer Port
PCI slot 2
PCI slot 3
AGP port
PCI slot 4
PCI slot 5
ISA slot 2
ISA slot 1
Flash BIOS
1
J8
Intel 82443BX
PCI slot 1
CPU slot (Slot One type)
Intel
82371EB
FAN3
1
Secondary IDE connector
Floppy drive connector
ATX power connector
National
LM79
National
LM75
EXTSMI
1
JP8
1
1
JP2
FAN 1
1
1
FAN2
1
J9
Ensoniq
Audio PCI
1
J11
1
J13
J10
1
1
1
CON3
CON2
Joystick
Line in
Microphone in Speaker out
JP4
JP7
J7
JP17
1
1
1
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14
Chapter 2
Board Installation
Intel 443BX
LM75
3 DIMM slots
AGP port
Intel PIIX4e
AMIBIOS
LM79
2 ISA slots
5 PCI slots
Slot One Connector
PS/2 ports
USB ports
COM2 LPT1 COM1
Joystick
Audio ports
Ensoniq 1371
AudioPCI
AC97codec
National Super I/O
OnBoard
Speaker
BiColor LED
Picture of Motherboard Features
Fuse 1
Fuse 2
F1 (Fuse 1), F2 (Fuse 2): Rated 30V DC, hold current at 1.6 A.
S1846 Tsunami ATX
15
INSTALL
1. Setting Jumpers
1-A. CPU Speed Settings (JP10-JP13)
There are two steps to set the CPU speed. First, set the clock multiplier with
jumpers JP10-JP13 according to the specification of your CPU using the chart
below. There is no need to set the bus speed. The motherboard auto-detects
the bus speed of the CPU. Presently all Celeron CPUs use a 66MHz bus speed.
Tyan does not recommend operating CPUs, memory, or PCI Bus at higher than
rated speed. Tyan takes no responsibility for any problems related to
overclocking any bus or component on the system board.
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2)) 21 2)) 21
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2))212121
JP10, JP11,
JP12, JP13
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Chapter 2
Board Installation
1-B. Front Panel Assignment (1x27: Jumper J8)
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DEL
DNG=22
teseR=32
V5=42
lanretnI=62
rekaepS
-rekaepS=72
1-C. Wake-On LAN (CON3) & FAN Connectors
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- Fan1 connector corresponds to Rear Chassis Fan.
- Fan2 connector corresponds to CPU 1 slot.
- Fan3 connector corresponds to Front Chassis Fan.
1-D. Clear CMOS and Reset Password (Jumper JP2)
If you have been locked out of your system because you forgot your pass
word or set the CMOS incorrectly, follow the instructions below.
1. Power off the system
2. Set jumper JP2 to pins 2 and 3 (see next page for location of JP2).
3. Wait for 2 seconds, then return
jumper JP3 to pins 1 and 2.
4. Power on the system again.
By following this procedure, you
will erase your password and reset
the CMOS to the BIOS defaults.
2PJ
tluafeD
2-1
SOMCteseR
3-2
JP7, JP8
JP4
J8
JP2
FAN3
FAN1
FAN2
CON3
JP17
J7
S1846 Tsunami ATX
17
INSTALL
1-E. IR/Floppy
Set to 2 FDD if you are using 2 floppy drives.
DDF/RI4PJ7PJ8PJ
DDF2
NO3-22-1
)tluafeD(DDF1/RI1
FFO2-13-2
1-F. Onboard Sound Enable (S1846SLA only)
dnuoS71PJ
elbanE
FFO
elbasiD
NO
1-G. Chassis Intrusion Alarm Connector
The J7 connector is an intrusion alarm, that can be connected to the system
chassis. When active (J7 is closed), this alarm will alert the system administrator anytime someone opens the systems case.
Soft Power Connector
The Soft Power Connector is pins 1-2 of jumper block J8. The Tsunami ATX
uses the chipset for power management, including turning on and off the
system. If the Power Button Function option in the BIOS Power Management
Menu is set to On/Off (which is the default), pressing the power button once
after the BIOS has booted up will turn the system on and off. If the Power
Button Function option is set to Suspend, pressing the power button once will
wake the system or send it to Suspend mode. In this case, you cannot turn the
system off unless you shut down through the Windows operating system or
you hold the power button down for four seconds.
Hardware Reset Switch Connector Installation
The Reset switch on your cases display panel provides you with the Hardware Reset function, which is the same as power on/off. The system will do a
cold start after the Reset button is pushed.
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18
Chapter 2
Board Installation
!
important!
External SMI
The EXTSMI (External System
Management Interface) connector,
JP16, is used by some plug-in cards.
Certain applications associated with
these plug-in cards use the interface
for hardware control and queries.
Ensoniq Audio Connectors
(S1846SLA only)
There are four black 4-pin connectors
onboard which are used for various
peripherals audio signals. The digital
signal that comes in through these
connectors is directed through the Ensoniq 1371 PCI sound chip, and the
digital signal is turned into an audio signal which goes out through the
speaker. The TDA connector (J10) is for modem audio; the MPEG connector
(J9) is for DVD and TV cards; the VIDEO connector is (J11); the CD connector
(J13) is for CD-ROMs.
CMOS RTC
The Real Time Clock (RTC) circuit, which provides the date and time for the
system is integrated into the 440BX/GX or Via Apollo Pro Plus AGPset. If the
external battery for the RTC is low, it will prevent your system from POSTing,
and you will not get a display. Normally the life span of an external battery is 2
years. If yours is running low, you will need to replace it with a new 3V lithium
battery (Sony CR2032).
Flash EEPROM
The Tsunami ATX uses flash memory to store BIOS firmware. It can be easily
updated if necessary using the flash utility (see page 67). Tyan does not
recommend flashing the BIOS unnecessarily. Check the Tyan web site for the
latest BIOS revision.
2. Mounting the Motherboard in the Chassis
Follow the instructions provided by the case manufacturer for proper installation guidelines. TYAN recommends that you use only one screw to hold down
the motherboard. The rest of the mounting holes should be used for the plastic
J10
J13, J11
J9
Battery
JP16
S1846 Tsunami ATX
19
INSTALL
standoffs. If your case does not have a hole for a standoff, simply cut off the
bottom of the plastic standoff so that the flat portion rests on the metal. The
adapter cards and the screws holding them down will keep your board flat. The
fastening screw should not short any of the traces on the motherboard. Make
certain that you do not overtighten the screw, as it will damage the motherboard and possibly break internal traces in the surrounding area. The hole you
should use is located at the top-center of the board where the adapter cards
are fastened to the case.
3. Installing Memory
Since TYAN boards are manufactured with performance in mind, you should
use add-in components that match. Some DIMM modules may seem to be high
quality because of name or feel but that does not guarantee real-world
usability. Some cheaper or OEM memory may have brand-name components,
but they may contain inferior or substandard parts which do not meet the
critical tolerances our products require. Because of this, your memory may not
work correctly in a TYAN board though it may work well in a competitors
board. This is because many of our competitors do not adhere to the strict
tolerances required for high performance. If you buy a TYAN board, you are
getting the best system available. To make installation easy and trouble free,
get high quality parts. Some brands we recommend are Corsair Microsystems,
Kingston Memory, and QesTec Incorporated. These DIMMs have proven to
be very stable on our boards and perform extremely well.
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20
Chapter 2
Board Installation
Figure 2-3
To install your DIMMs, line your module up so that the pins fit into the slot.
There is only one way that your DIMM can fit properly. Make sure that the
short row of pins is lined up with the short gap in the DIMM slot. Figure 2-3
above shows how to sit the DIMM into its slot. To insert the DIMM, push
down vertically on the module with even force, as shown in the photo. Do not
shove one end in first; doing so will bend the DIMM pins.
To lock the DIMM into place, push the plastic clips on either end of the slot
onto the notches in the ends of the DIMM (see Figure 2-4 on the next page).
To remove your DIMM, simply pull the clips back, and pull up on the module.
Place the DIMMs in an anti-static bag as soon as you remove them to avoid
static damage.
The Tsunami ATX uses a 64-bit data path from memory to CPU and can
accommodate up to 1 GB of SDRAM. The 168-pin DIMMs (Dual In-line
Memory Modules) must be of the 3.3V, unbuffered variety. The position of the
notch in the SDRAM key position will tell you whether or not a DIMM is
S1846 Tsunami ATX
21
INSTALL
Figure 2-4
unbuffered (see the Figure 2-5 below). All installed memory will be automatically detected, so there is no need to set any jumpers.
Figure 2-5
Some details of memory installation:
At least one unbuffered DIMM must be installed for the system to POST.
The mainboard supports 32MB, 64MB, 128MB SDRAM; and supports
256MB registered SDRAM DIMM modules. *
PC-100 DIMM is required if CPU bus speed is at 100MHz
!
important!
RFU
Buffered
Unbuffered
168-pin DIMM
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Chapter 2
Board Installation
The table below shows some of the possible memory configurations. Not all
possible configurations are listed.
Warning! The 256MB DIMMs represented in the table are REGISTERED
memory chips. DO NOT use registered and non-registered memory chips
simultaneously! (Check with your memory dealer for more information).
See www.tyan.com for latest memory compatibility information.
Cache Memory
Celeron processors have the L2 (Level 2) cache built into their architecture, so
there is no need for an L2 cache on the motherboard. The Celeron processor
has a physical L2 cache size of 128KB and a cacheable memory area of 512MB.
1knaBMMID2knaBMMID3knaBMMIDlatoT
1xBM800BM8
1xBM81xBM80BM61
1xBM81xBM81xBM8BM42
1xBM611xBM81xBM8BM23
1xBM611xBM611xBM8BM04
1xBM611xBM611xBM61BM84
1xBM231xBM611xBM61BM46
1xBM231xBM231xBM61BM08
1xBM231xBM231xBM23BM69
1xBM461xBM231xBM23BM821
1xBM461xBM461xBM23BM061
1xBM461xBM461xBM46BM291
1xBM8211xBM461xBM46BM652
1xBM8211xBM8211xBM46BM023
1xBM8211xBM8211xBM821BM483
1xBM6521xBM6520BM215
1xBM6521xBM6521xBM652BM867
warning
S1846 Tsunami ATX
23
INSTALL
4. Installing the CPU and Cooling Fan
Pentium II or Pentium III processors (233 through 500MHz) can be used on the
Tsunami ATX. Please refer to page 15 for the correct CPU jumper settings for
your board. Remember:
• The CPU is a sensitive electronic component and it can easily be damaged
by static electricity. Do not touch the CPU pins with your fingers.
• Before the CPU is installed, the motherboard must be placed on a
flat surface. You should be able to insert the CPU with minimal, but
firm, pressure. Do not press down hard on the CPU.
Currently, two types of cooling mechanisms are produced for Pentium II
processors: active (figure 2-6a) and passive (figure 2-6b). These two types of
cooling methods essentially perform the same function. The active cooler is
equipped with a cooling fan and heat sink, while the passive cooler is simply a
larger heat sink with no fan. The type of cooler used has no effect on performance, and both types can be installed in the Slot 1 connector on the Tsunami
ATX board.
Figure 2-6a Figure 2-6b
Installing CPU Retention Modules
Installation of a Pentium II processor requires a CPU retention module, which
is first secured onto the motherboard. Tyan offers a variety of retention
mechanisms for the different CPU types. See Appendix 1 for options.
Installation of SECC2 CPUs (Figure 2-7) with the
retention modules require a little more attention
and care. Instructions for SECC2 CPU installation
can be found on pages 26-29.
!
important!
Figure 2-7
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Chapter 2
Board Installation
To attach the retention module, place
the motherboard on a flat surface.
Locate the key pin on one end of the
Pentium II slot on the board. Then
carefully line up the key notch on the
retention module with the key pin on
the Pentium II slot (the key pin on
the Pentium II slot indicates the
correct orientation of the CPU) See
Figure 2-8.
Drop the retention module (Figure 2-9) down
over the Pentium II slot so that the retention
module sits flat against the motherboard. Tighten
the screws in a clockwise manner to secure the
module to the board. Warning: Do not overtighten the screws as you may damage the
module and/or the motherboard.
Installing the CPU with Active Cooling
When the retention module is securely installed, you are
ready to plug in the CPU. Press down firmly on the CPU until
you hear a click (see Figure 2-10). This clicking sound
indicates that the CPU is fully locked into the retention
module. If you have an active cooler, you will also need to
connect the CPUs cooling fan cable to the cooling fan power
connector on the board.
Locate the cooling fan connector (e.g. FAN1) on the motherboard. Plug the CPUs cooling fan cable into the cooling fan
connector on the board. There will be a plastic clip assembly
similar to that of the ATX power connector that will force you to connect the
fan cable correctly (see Figure 2-11 on the following page).
Figure 2-8 - Pentium II Slot Connector and Key Pin
Figure 2-9
Figure 2-10
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INSTALL
Figure 2-11
Installing the CPU with Passive Cooling
The installation of the CPU with passive cooling differs only slightly from that of
the active. Your passive cooling package should contain one CPU retention
module, one heat sink retention bracket with mounting locks, two mounting
attachments, and one heat sink lock.Install the retention module as explained in
the previous section.
The heat sink mount (Figure 2-12) has
two pins on the bottom and four pins
on the top. Notice that the bottom two
pins are of different sizes. The size of
the pins and the holes in the motherboard will determine the correct
orientation. When the bracket is
correctly installed, the four pins on top
will be right next to the Slot 1 connector.
Insert the heat sink mount into the holes on the motherboard. When the bracket
is properly inserted into the holes on the motherboard, you will hear a clicking
noise.
Figure 2-12
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Chapter 2
Board Installation
Align the CPU with the CPU retention module. Make sure the heat sink is lined
up with the heat sink mount bracket. If you put the CPU in the wrong way, you
may damage the CPU, the motherboard, and/or the CPU socket. Slowly press
down on the CPU module until the CPU locks into place. You will hear a clicking
noise when the CPU is locked securely into the module.
The heat sink lock (Figure 2-13) has four
notches which will correspond to the four
pins on the heat sink mounting bracket.
Gently slide the lock between the heat
sink and the heat sink mounting bracket
until both sides of the lock are firmly
secured. A clicking sound will be heard when the lock is securely fastened to the
heat sink mounting bracket. To remove the lock from the heat sink mounting
bracket, gently press the ends of the locks inward and pull.
Lock the heat sink mount to the board by inserting the two
mounting locks (Figure 2-14) into the pins of the heat sink
mounting bracket which are now below the mainboard.
There will be a click when the locks are securely fastened.
Removing the CPU.
To remove the CPU, move the locks to the center of the
CPU. A click will be heard when the CPU has been unlocked. Gently pull up on
the CPU, taking care not to bend the motherboard or the CPU retention module.
To remove the lock from the retention module, gently press the ends of the locks
inward and pull.
Installing SECC2 CPUs
The major physical difference between original Pentium IIs (SEC)and new
Pentium II/P-III (SECC-2) is the plastic CPU enclosure. As Figure 2-15 indicates,
the plastic CPU enclosure covers the entire CPU card of regular Pentium IIs. On
the other hand, the plastic CPU enclosure covers only the side faces of the
SECC2 Pentium II card.
Due to the physical differences in the SECC2 CPU, installing the retention
modules requires a different technique than the ones previously discussed.
Figure 2-13
Figure 2-14
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On both sides of the SECC-2 CPU reside the lower tabs of the aluminum heat
sink and the bottom corners of the plastic CPU enclosure (see Figure 2-16).
These tabs and corners should fit into the retention braces.
Warning: DO NOT first screw the retention braces onto the motherboard by
themselves. If you do, you will have difficulties inserting the CPU into the
retention braces and CPU slot.
SEC Pentium II SECC-2 Pentium II
Figure 2-15
Lower Tabs
Enclosure
Corners
Figure 2-16
warning
INSTALL
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