Tyan Computer S1854 User Manual

Tyan S1854

Trinity 400

Motherboard User’s Manual

Revision 2.00

Copyright © Tyan Computer Corporation, 2000. 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 property of their respective companies including, but not limited to the following.

Award is a trademark of Phoenix Technologies Ltd. Windows is a trademark of Microsoft Corporation. IBM, PC, AT, PS/2 are trademarks of IBM Corporation.

INTEL, Pentium II/ III, Celeron are trademarks of Intel Corporation. S1854 Trinity 400 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.

PRINTEDINTAIWAN

Table of Contents
1. Introduction..................................................................................................	4
Overview.............................................................................................	4
Icons.................................................................................................	5
Chipset Hardware Specifications/Feaures....................................	6
Technical Support..............................................................................	8
Returning Merchandise for Service................................................	8
2. Board Installation.......................................................................................	10
Unpacking.......................................................................................	10
Installation......................................................................................	10
Quick Reference for Jumpers........................................................	12
Map of Motherboard Jumpers.....................................................	13
Setting Jumpers.............................................................................	16
Clear CMOS & Reset Password ..................................................	17
Soft Power Connector....................................................................	17
Hardware Reset Switch Connector Installation.........................	18
Creative Labs Audio Connectors ................................................	18
Chassis IntrusionAlarm Connector............................................	18
Power LED Connector.....................................................................	19
CMOS RTC......................................................................................	19
Flash EEPROM...............................................................................	19
Mounting the Motherboard in the Chassis ..............................	19
Installing Memory..........................................................................	20
Installing the CPU and Cooling Fan...........................................	24
Connecting IDE and Floppy Drives.............................................	27
Installing Add on Cards ...............................................................	29
Connecting PS/2, USB, Serial and Parallel Devices...................	30
Connecting the Power Supply......................................................	32
3. BIOS Configuration..................................................................................	33
Main Setup Menu..........................................................................	36
Standard CMOS Setup................................................................	38
BIOS Features Setup.......................................................................	41
Chipset Features Setup...................................................................	46
Power Management Setup............................................................	49
PnP/PCI Configuration ...................................................................	54
Intergrated Peripherals....................................................................	57
Flash Writer Utility...........................................................................	60

4. System Resources......................................................................................	63
Beep Codes.....................................................................................	63
Troubleshooting System Problems..............................................	64
Displayed Error Messages.............................................................	64
Appendix -1 Glossary.....................................................................................	67
Appendix -2 Retention module Installaion.................................................	74
Compliance Information...............................................................................	79

Chapter 1

Introduction

chapter 1

Introduction

Overview

The S1854 Trinity 400 is a quality, high performance motherboard designed for Socket 370 Intel Celeron and Slot 1 Intel PII/ PIII microprocessors. The Trinity 400 utilizes the VIAVT82C694X withAward BIOS for S1854 & S1854-A models. S1854 can support Celeron/ PII/ PIII CPU speeds of 300MHz through 750MHz, and host bus speeds of 66MHz to 133MHz, the VIA chipset’s bus speed is Auto-Determined by the CPU. The S1854 motherboard, with built-in 4x 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, 3D Games and video production.

This system board in an ATX form factor offers far more features and expandability than Micro ATX models. Some of the features included are onboard dual channel PCI PIO, Bus Master IDE and UltraDMA/66, onboard floppy controller, and onboard high speed I/O.

Flexibility and expandability have been designed into the Trinity 400. With I/O and drive controller support built onboard, the one AGP slot, six PCI, a total of seven usable are free for numerous add-on expansion cards.

Remember to visit TYAN Computer’s web site located at http://www.tyan.com. There you can find information on all of TYAN’s products along with FAQs, distributors list, and drivers.

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1.

2.

3. procedure

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

	important!	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 install your motherboard.

While we have alerted you to potential dangers in several places in

warning 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.

S1854 Trinity 400

INTRO

5

Chapter 1

Introduction

Hardware Specifications/Features

Processor Information	•One Socket 370 CPU connector
	•One Slot 1 CPU connector
	•66/ 100 / 133MHz bus support (auto-deter
	mined by CPU)
	•Celeron 300 to 533MHz
	•Pentium II and Pentium III up to 750MHz
Chipset Information	•VIA Apollo Pro 133:VT82C694X+VT82C596B
	•Winbond ‘977 EF Super I/O chipset
Voltage and Power	•ATX power supply connector
Information	•+12V power source for DC fan onboard
	•3.3V DRAM support
MainMemory	•Up to 768MB onboard (1.5GB not verified at
	time of print, please see website for details.)
	•Three 168-pin DIMM sockets
	•Supports 100MHz & 133 MHz SDRAM with
	SPD
	•Supports VCM Memory
Expansion Slots	•One 4x 32-bit AGP slot
	•Six 32-bit PCI Bus Master slots
	•One 16-bit ISA slot (shared w/ one PCI)
	•Total seven usable slots
Physical Dimensions	•ATX design
	•12 inches x 8.35 inches
	•S1854 requires compatible I/O shield
BIOS Information	•Award Plug and Play flash BIOS
	•Deep Green, Energy Star,ACPI, Year 2000,
	•Soft power-down, multiple boot options
	•Win95/Win98/NT4/Win2000 ready, DMI 2.0
	compliant
	•PCI 2.2, APM 1.1 compliant (All PCI slots
	have a 3.3V standby)
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Disk Drive & System I/O	•Two PCI bus mastering EIDE channels
	•Supports EIDE CD-ROMs
	•PIO Mode 3 & 4 (up to 17MB/sec DTR)
	•UltraDMA/66 bus mastering mode (up to
	66MB/sec DTR)
	•Support for two floppy drives (up to 1.44MB)
	•Two serial ports (16550 UARTs)
	•One ECP/EPP parallel port
	•One IR (InfraRed) I/O interface port header
	•Two USB rev 1.2 (universal serial bus)
	connectors
	•One PS/2 mouse port
	•One PS/2 keyboard port
Creative Labs ES 1373 PCI	•AC97 Codec
Audio (S1854A 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

Software Specifications

OS	•Operates with MS-DOS ver 6.22, Windows 98
	& Win98 SE, Windows NT 4.0, Novell 5.0
	Windows 2000(RC3) pending, SCO Unix 5.01
	Linux 6.0
	Please refer to web for OS updates

INTRO

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Chapter 1

Introduction

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 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). Please refer to your dealer for specific warranty coverage details.

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.Check the Tyan user group: alt.comp.periphs.mainboard.tyan

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.

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Chapter 2

Board Installation

chapter 2

Board Installation

Unpacking

The motherboard package should contain the following:

(1) S1854 mainboard

(1) 40-pin IDE and 34-pin floppy cable pack

(1) 80-pinATA-66 IDE cable

(1) S1854 User’s Manual

(1) Driver CD

(1) URM Retention Module (URM is shipped mounted on the motherboard)

Installation

You are now ready to install your motherboard. The mounting hole pattern of the S1854 matches the ATX system board specifications. Your chassis should support a standard ATX mainboard form factor.

How to install our products right...the first time.

What’s the first thing I should do?

The first thing you should do is read this user’s manual. It contains important information which will make configuration and setup much easier.

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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.)

(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.

!DONOTAPPLYPOWERTOTHEBOARDIFITHASBEENDAMAGED!

important!

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, don’t 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.

Installation Steps

1. 1. Set Jumpers

2.

3. 2. Mount Motherboard in Chassis procedure 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

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INSTALL

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Chapter 2

Board Installation

Quick References for Jumpers

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 theFigure 2-1 for examples of “on” and “off” pins and jumpers.

Jumpers and pins are connected by slipping the 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 example of pin connections.

2 pin jumpers

3 (or more) pin jumpers

off on

Figure 2-1

1-2

2-3

open

1	1	1
2	2	2
3	3	3

Figure 2-2

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.

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Figure 2-3 : Map of Motherboard Jumpers

Keyboard	Mouse		FAN1	connector
		PGA370	1
					1
	USB0

		USB1		Socket 370		VIA		powerATX		connector
				CPU
										drive
						VT82C694X
		Port								Floppy
		Printer						1	1
Audio Optional)	Line in Line out	COM2COM1 Joystick	1	FAN4	SlotCPUType1	DIMMbank1 DIMMbank2 DIMMbank3	Secondary IDE connector			Primary IDE connector
(Onboard	Microphone in			Creative	AGP port
		1 1		ES1373			1
			J23						J16
		J22	(CD)		PCI slot 1
		(Video)				J7
		1 J21		1CON3 (WOL)	PCI slot 2
				1
				CON2 (WOR)
					PCI slot 3	JP10	JP11	JP12	JP13
					PCI slot 4	VIA				1
						VT82C596B	D31		FAN3
					PCI slot 5		Int. SPKR 1
					PCI slot 6	Flash BIOS				J12
										SPKR
						JP20(reserved)	3 volt
					ISA slot	JP2	lithium
							battery
						1

The tiny “1”s next to jumpers of 3 pins or more indicate the position of pin 1 for that jumper.

S1854 Trinity 400

INSTALL

13

Chapter 2

Board Installation

Figure 2-4 : Map of S1854 Features

PS/2 Mouse &

3 DIMM slots

Keyboard

ports

Socket 370 for

Slot 1 Type for

Celeron CPU

Pentium II/III

Parallel, 2 Com

2 USB ports

Fuse 1, 2

CPU

ports

1

Joystick / Audio ports (Onboard Audio Optional)

AGP port

4x

6 PCI slots

1 ISA slot

port Floppy header supply

AGPset

BIOS

Battery

power ATX

EIDE ch-2

133A Plus Pro Apollo Via

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!Important!

important! Pleae note: In some versions of the S1854 board, there is an extra jumper setting (JP21) for CPU SELECTION.

CPU	JP21
Slot 1	Close
PPGA-370	Open

If you are using a Slot 1 Type CPU, please close the jumper, if your CPU is a socket please leave the jumper open.

JP21(CPU Select)

Warning: If JP21 is set to the incorrect CPU type, there will be no video display at Post. Please correct the jumper setting and reboot the system.

INSTALL

S1854 Trinity 400

15

			Chapter 2
			Board Installation
	!	1. Setting Jumpers
		1-A. CPU Speed Settings (Jumpers JP10, JP11, JP12, JP13)
	important!	There are two steps to set the CPU speed. First, set the clock multiplier with
		jumpers JP10 -13 according to the specification of your CPU using the chart
		below. After the system is ready to boot the BUS Speed is auto-detected.
			Presently all Celeron CPUs use a 66MHz bus speed. (Tyan does not recom-
		mend 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.)
			M u l t i p l i e r	B u s S p e e d	C P U s p e e d												J P 1 0									J P 1 1	J P 1 2	J P 1 3
			( s e t J m p r s	( s e t i n
			o n b o a r d )	B IO S )
			3 . 5	1 0 0	3 5 0												O N									O F F	O F F	O N
				1 3 3	4 6 6
			4	1 0 0	4 0 0												O F F									O N	O N	O N
				1 3 3	5 3 3
			4 . 5	6 6	3 0 0												O F F									O N	O F F	O N
				1 0 0	4 5 0
				1 3 3	6 0 0
			5	6 6	3 3 3												O F F									O F F	O N	O N
				1 0 0	5 0 0
				1 3 3	6 6 7
			5 . 5	6 6	3 6 6												O F F									O F F	O F F	O N
				1 0 0	5 5 0
				1 3 3	7 3 3
			6	6 6	4 0 0												O N									O N	O N	O F F
				1 0 0	6 0 0
				1 3 3	8 0 0
			6 . 5	6 6	4 3 3												O N									O N	O F F	O F F
				1 0 0	6 5 0
				1 3 3	8 0 0
				6 6	4 6 6
			7	1 0 0	7 0 0												O N									O F F	O N	O F F
				1 3 3	9 3 3
				6 6	5 0 0
			7 . 5	1 0 0	7 5 0												O N									O F F	O F F	O F F
				1 3 3	9 9 7
			8	6 6	5 2 8												O F F									O N	O N	O F F
				1 0 0	8 0 0
				1 3 3	1 0 6 4

JP10, JP11,

JP12, JP13

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1-B. Panel Connector Settings (Jumper J16)

	HDD	LED	LED+					1		2		LED Green					Pwr/Slp LEDs
			LED-					3		4		LED Yellow
	Reset	Switch	Ground					5		6		Power On/Off					Power	(Sleep) Switch
			Reset					7		8		Ground
			VCC					9		10		NC.
		Infrared	IRRX					11		12		Power +5V
			Ground					13		14		N.C
			IRTX					15		16		N.C
		Buz	RESV					17		18		N.C						Buz
J16
																	To p
2		4		6		8	10			12		14		16	18
1		3		5		7	9			11		13		15	17		Bottom

Power LED:

For 2-pin: bicolor/single color - Use pins 2-4

For 3-pin: Use jumper D31.

1-C. Speaker Connector (Jumper J12)

The speaker should be connected to pins 1-4 of jumper J12. As default, pins 3-4 of jumper J12 are connected to the internal buzzer.

1-D. Wake-On LAN (CON3)

1-E. Wake-On Ring (CON2)

1-F. Clear CMOS and Reset Password (Jumper JP2)

	Default	Reset
JP2	1-2	2-3

	!	If you have been locked out of your system because you forgot your password
		or set the CMOS incorrectly, follow the instructions below.
	impor-	1. Power off the system, UNPLUG POWER CONNECTOR
		2. Set jumper JP2 to pins 2 and 3
	tant!

3.Wait for 2 seconds, then return jumper JP2 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.

S1854 Trinity 400

INSTALL

17

Chapter 2

Board Installation

1-G Soft Power Connector

The Soft Power Connector is part of jumper block J16. The Trinity 400 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.

1-H Hardware Reset Switch Connector Installation

The Reset switch on your case’s 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. (J16 pin 7 & 8)

1-I Creative Labs Audio Connectors (optional)

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 Creative Labs ES1373 PCI
sound chip, and the digital signal
	CON3
is turned into an audio signal	(WOL)
which goes out through the
speaker. The TDA connector	CON2
(J21) is for modem audio; the	(WOR)
VIDEO connector is (J22); the CD
connector (J23) is for CD-ROMs.

J16

J12 (Speaker)

JP2(Clr CMOS)

1-J Chassis Intrusion Alarm Connector

The J7 connector is an intrusion alarm, that can be connected to the system chassis. When active (J7 is connected to the chassis), this alarm will alert the system administrator anytime someone opens the system’s case.

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1-K Power LED Connector

Jumper D31 is a three pin power LED header that can be used if you have a 3 pin Power LED. Otherwise refer to panel connector J16 for 2 pin LEDs. 3 pin LED’s can still be used on J16 where pin 13 would be for the Ground pin.

CMOS RTC

The Real Time Clock (RTC) circuit, which provides the date and time for the system is integrated into the Via Apollo Pro Plus 133AAGPset. 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 Trinity 400 uses flash memory to store BIOS firmware. It can be updated as new versions of the BIOS become available. You can upgrade your BIOS easily using the flash utility (see page 60).

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 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

important! should use is located at the top-center of the board where the adapter cards are fastened to the case.

INSTALL

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Chapter 2

Board Installation

3. Installing Memory

Since TYAN boards are manufactured with performance in mind, you should use add-in components that match. It is highly recommended that the memory DIMMs are installed prior to connecting the power supply. 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 brandname 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 competitor’s 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 Advantage Memory, Corsair Microsystems, Millenium, Kingston Memory, QesTec Incorporated, Unigen, Micron Technology, and Crucial Technology. These DIMMs have proven to be very stable on our boards and perform extremely well.

warningThis motherboard operates on a 3.3 volt standby for the DIMM banks .

Because of this, you need to UNPLUG the AC power cord before installing your DIMM memory modules. Otherwise, the motherboard may automatically power up when the memory is inserted into the slot.

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20

INSTALL

Figure 2-5*

*Note: The image above is used to illustrate a concept and may not represent the actual image of your motherboard.

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 2-5 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 2-6 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.

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Chapter 2

Board Installation

Figure 2-6*

*Note: The image above is used to illustrate a concept and may not represent the actual image of your motherboard.

The Trinity 400 uses a 64-bit data path from memory to CPU and can accommodate up to 768MB 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 unbuffered (see the Figure 2-7 below). All installed memory will be automatically detected, so there is no need to set any jumpers.

	RFU						Unbuffered	168-pin DIMM
	Buffered

Figure 2-7

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22

Some details of memory installation:

•At least one unbuffered DIMM must be installed for the system to POST.

•The mainboard supports 32MB, 64MB, 128MB and 256MB SDRAM.

•PC-100 DIMM is required if CPU bus speed is at 100MHz

The table below shows some of the possible memory configurations. Not all possible configurations are listed.

						INSTALL
	DIMM Bank 1	DIMM Bank 2	DIMM Bank 3	Total
	8MBx1	0	0	8MB
	8MBx1	8MBx1	0	16MB
	8MBx1	8MBx1	8MBx1	24MB
	16MBx1	8MBx1	8MBx1	32MB
	16MBx1	16MBx1	8MBx1	40MB
	16MBx1	16MBx1	16MBx1	48MB
	32MBx1	16MBx1	16MBx1	64MB
	32MBx1	32MBx1	16MBx1	80MB
	32MBx1	32MBx1	32MBx1	96MB
	64MBx1	32MBx1	32MBx1	128MB
	64MBx1	64MBx1	32MBx1	160MB
	64MBx1	64MBx1	64MBx1	192MB
	128MBx1	64MBx1	64MBx1	256MB
	128MBx1	128MBx1	64MBx1	320MB
	128MBx1	128MBx1	128MBx1	384MB
	256MBx1	256MBx1	0	512MB
	256MBx1	256MBx1	256MBx1	768MB
	512MBx1	512MBx1	512MBx1	1.5GB*

*1.5GB memory onboard not verified at time of print please see website for details.

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Chapter 2

Board Installation

4. Installing the CPU and Cooling Fan

!

important!

Socket 370 type Celeron processors (300 through 533MHz) and Slot 1 type Pentium II/III can be used on the Trinity 400. Please refer to page 15 for the correct CPU jumper settings for your CPU. 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. You should be able to insert the CPU into the socket with virtually zero force.

•Do not press down hard on the CPU as you will bend or break pins.

Installing Socket 370 Type CPUs

Pin 1 on the CPU is denoted by a small dot on one of the corners and Pin 1 on the ZIF socket is denoted by an angled corner.

Note: If two CPUs are installed simultaneously, there is a tremendous risk of shorting out both CPUs and the motherboard. DO NOT install 2CPUs at the same time!

Figure 2-8

Push down lightly on the CPU, and lower the arm on the ZIF socket to secure the CPU. (Figure 2-8) A squeaking noise is normal as the arm lowers. Never force a CPU into a socket. Forcing a CPU to seat will bend the pins on the CPU and possibly damage the motherboard. Check with your vendor or manufacturer for proper voltage selection.After the CPU is securely seated, install the appropriate cooling device. Tyan strongly recommends a heatsink/fan combination. Consult with your case manufacturer for other cooling options.

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