Abit PTX5NE User Manual
Table of Contents
Chapter 1 Introduction of PX5N/TX5N Features
¬ PX5N
l Specifications ................................................................................1-2
l Layout diagram .............................................................................1-4
- TX5N
l Specifications… … … … … … … … … … … … … … … … … … … 1-5
l Layout diagram … … … … … … … … … … … … … … … … … … 1-8
® System block diagram................................................................. .1-9
Chapter 2 Installing the Mainboard
¬ Installing the Mainboard to the Casing .........................................2-3
- Standard External Connectors......................................................2-4
® Jumpers and Switches................................................................2-11
¯ Presentation and Installation of the CPU ....................................2-12
° Installing System Memory
¡i
Chapter 3 Introduction of BIOS
¬ Standard CMOS Setup Menu........................................................3-4
- BIOS Features Setup Menu .........................................................3-6
® Chipset Features Setup Menu................................ 3- 2
¯ ow r an ge en S tu M nu ................3 14
PC & On oa d /O Se up ..........................3 18
Lo d IO D fa lt ................................................................ 3- 3
² oa S tu D fa lt ................................................................ 3- 3
³ as wo d et in ................................................................ 3- 4
´ DE HD A to De ec io ......................................................... -2
DRAM Memory
¡j
.........2-20
Part No:MN-099-2A0-41 Rev:1.00
Appendix A Quick Installation
Appendix B Intel Pentium CPUs
Appendix C AMD-K5 CPUs
Appendix D Cyrix / IBM 6x86 CPUs
Appendix E General Discussion about HDD Installation
Appendix F Technical Support
Appendix G Flash BIOS User Instructions
Appendix H How to install Ultra DMA/33 drive
Appendix I How to install PCI Bridge Batch file
Chapter 1 Introduction of PX5N/TX5N Features
1-1
Ch pt r I tr du ti n f
PX5N/TX5N Features
The PX5N/TX5N has been especially designed for File server, Workstation
and Professional users. It can support a wide range of processors, including
all Intel CPUs (P54C) and Intel CPUs with MMX (P55C), as well as all AMDK5/K6 and Cyrix 6x86/6x86L/6x86MX CPUs. It also takes into account, as
much as possible, all future CPUs.
The PX5N/TX5N uses DIP switches or jumpers.
The PX5N/TX5N uses Intel 430TX series chipsets, and has 512
Le el 2 ip li e ur t RA o b ar .
1 8- in DI M D al In Li e em ry Mo ul ) sl ts an 7 -p n IM
( in le In Li e em ry Mo ul ) sl ts me t he re ui em nt f r ll me or
co fi ur ti ns re ui ed by hi h ev l om ut ng he 16 -p n IM s ot
su po t ra it on l as P ge an E O E te de D ta Ou ) DR M s
me or s an ar f r ex g ne at on 64 bi s st ms T e 68 pi D MM sl ts
av b en re er ed to me t eq ir me ts fo b th pr se t nd fu ur u gr de .
T e X5 /T 5N al o ro id s wo Un ve sa S ri l us (U B) po ts an
me ts th C nc rr nt PC R v. 2. s an ar . It su po ts ID i te fa e or
as H D Mo e ~4 a d lt a MA 33 a w ll as ID B s as er
Th se fe tu es al o ee p es nt an f tu e interface standards and needs.
System BIOS features include Plug-and-Play (PnP), Advanced
Configuration Power Interface (ACPI), the newest Desktop Management
Interface (DMI), as well as PX5N/TX5N’s unique CPU operating frequency and
voltage setup feature in order to meet modern computing demands.
1-2 Chapter 1
¬
PX5N
nSpecifications
1. Supports AT power supply
. dj st en f r re ue cy an V lt ge
l Us s D P wi ch or ju pe w re t a ju t he fr qu nc a d
v lt ge on th m in oa d
l PX N oe n t up or C U OF M NU
3. Uses ZIF CPU Socket 7 for easy CPU installation
l Supports switching power for a more stable environment for the
CPU
l Supports Intel CPUs:
1) Pentium 100MHz to 200MHz
2 ) Pentium processor with MMXTM technology 166MHz
to
233MHz
l Supports AMD CPUs:
1 ) AMD-K5™ PR100 to PR166.
2) AMD-K6
TM
166MHz . 200MHz, 233MHz, 266MHz and
300MHz .
l Supports Cyrix/IBM CPUs:
1) Cyrix 6x86TM P120+, P133+, P150+, P166+, P200+.
2) Cyrix 6x86LTM P150+ ~ P200+.
3) Cyrix 6x86MX
TM
PR150 ~ PR233 .
l Reserved circuitry supports future sixth generation CPUs
4. Chipset
l Intel 430TX chipset
l Supports standard version PCI 2.1
5. L2 Cache Memory
l 512K of cache memory (Pipeline Burst SRAM)
6. System DRAM
l Two 72-pin SIMM sockets: support FP and EDO DRAM
l Two 168-pin DIMM sockets: support FP, EDO and Synchronous
DRAM (SDRAM)
Chapter 1 Introduction of PX5N/TX5N Features
1-3
l DIMM sockets use PC modules (3.3V Unbuffered DRAM)
l Up to 256MB memory configuration possible
7. System BIOS
l AWARD BIOS
l Supports Plug-and-Play (PnP)
l Supports Advanced Configuration Power Interface (ACPI)
l Supports Desktop Management Interface (DMI)
8. Multi I/O features
l
Two Universal Serial Bus (USB) ports
l
Four fast IDE channels (PIO mode 0~4, Ultra “DMA/33” and Bus
Master)
l One standard EPP/ECP parallel port and two 16550 serial ports
l
Two floppy is d iv c nn ct rs (F D) (3 0K 7 0K 1 2M
1. 4M an 2 88 )
l
Su po ts PS 2 yp m us
9 O he f at re
l
ta da d T rc it ct re di en io s
l
Fo r SA bu s ot a d ou P I us sl ts
l
S pp rt 3 MO E or a pe ial Japanese fl pp d sk dr ve
l
S pp rt t o oo ab e ar d sk -- bl t r n wo di fe en
op ra in s st ms
l
Supports IDE interface CD-ROM and LS-120 type flo py di k ri e
( oo o ly
l X5 u es a IP sw tc t c nf gu e he ma nb ar , R D IP
wi ch is us t s tu t e PU vo ta e- CORE and VIO. The
BLUE DIP switch is used to setup the CPU Frequency and Rating.
1-4 Chapter 1
Note: All brand names and trademarks are the property of their respective owners.
Chapter 1 Introduction of PX5N/TX5N Features
1-5
n
Layout diagram
Fig 1-2 Layout diagram
1-6 Chapter 1
- TX5N
nSpecifications
1. Supports AT and ATX power supply
2. Adjustment for Frequency and Voltage
l Using DIP switch or jumper wires to adjust the frequency and
voltage on the mainboard
l TX5N does not support CPU SOFT MENU.
3. Uses ZIF CPU Socket 7 for easy CPU installation
l Supports switching power for a more stable environment for the
CPU
l Supports Intel CPUs:
1) Pentium 120MHz to 200MHz
2 ) Pentium processor with MMXTM technology 166MHz
to
233MHz
l Supports AMD CPUs:
1 ) AMD-K5™ PR120 to PR166.
2) AMD-K6
l Supports Cyrix/IBM CPUs:
1) Cyrix 6x86TM P150+ ~ P200+.
2) Cyrix 6x86LTM P150+ ~ P200+.
3) Cyrix 6x86MX
l Reserved circuitry supports future Processors .
TM
166MHz ~ 233MHz.
TM
PR150 ~ PR233 .
4. Chipset
l Intel 430TX chipset
l Supports standard version PCI 2.1
5. L2 Cache Memory
l 512K of cache memory (Pipeline Burst SRAM)
6. System DRAM
l Four 72-pin SIMM sockets: support FP and EDO DRAM
l Two 168-pin DIMM sockets: support FP, EDO and Synchronous
DRAM (SDRAM)
l DIMM sockets use PC modules (3.3V Unbuffered DRAM)
Chapter 1 Introduction of PX5N/TX5N Features
1-7
l Up to 256MB memory configuration possible
7. System BIOS
l AWARD BIOS
l Supports Plug-and-Play (PnP)
l Supports Advanced Configuration Power Interface (ACPI)
l Supports Desktop Management Interface (DMI)
8. Multi I/O features
l
Two Universal Serial Bus (USB) ports
l
Four fast IDE channels (PIO mode 0~4, Ultra “DMA/33” and Bus
Master)
l One standard EPP/ECP parallel port and two 16550 serial ports
l
Two floppy disk drive connectors (FDD) (360K, 720K, 1.2M,
1.44M and 2.88M)
l
Supports PS/2 type mouse
9. Other features
l
Standard AT architecture dimensions
l
Three ISA bus slots and four PCI bus slots
l
Supports 3-MODE for a special Japanese floppy disk drive
l
Supports two bootable hard disks--able to run two different
operating systems
l
Supports IDE interface CD-ROM and LS-120 type floppy disk drive
(Boot only)
l TX5N uses a DIP switch to configure the mainboard, a RED DIP
switch is use to setup the CPU voltage-VCORE and VIO. The
BLUE DIP switch is used to setup the CPU Frequency and Rating.
1-8 Chapter 1
Knowledge
Computer
The EISCA (Enhanced Intelligent System Cooler Architecture) is a specially designed 12-pin
interface which integrates the Mainboard and the CPU cooling system. This system is a total
solution for PC system with heat sink problems. Due to increasing CPU speed, which causes
higher temperatures, finding ways to effectively deal with CPU temperatures is becoming a
more and more crucial problem. Effectively and precisely determining CPU temperature was a
very important requirement of Microsoft PC ’97. The area directly under the CPU socket is the
location on the mainboard closest to the CPU, and heat is conducted away from this area
through air circulation. Determining temperature change under these circumstances is very
imprecise, as it only allows us to detect large changes in temperature. In addition, because the
air under the CPU socket is confined to this area, the sensor cannot detect temperature in real
time. Tests have proven that under such circumstances, even after 5 minutes, the sensor
located under the CPU socket is unable to detect real temperature change, so it can not meet
the requirements for thermal problems.
In EISCA architecture, the thermal sensor is located at the heat-sink. In this way, the sensor is
able to detect CPU temperature in real time and more precisely. The EISCA monitors voltage,
fan speed and fan on/off control to meet Microsoft PC ’97 specifications.
Note: All brand names and trademarks are the property of their respective owners.
Chapter 1 Introduction of PX5N/TX5N Features
1-9
n
Layout diagram
Fig 1-3 Layout diagram
1-10 Chapter 1
®
System block diagram
Pen tium Processor
Host BUS
Second
Lev el Cache
PCI BUS
Fast
IDE
3.3V
Ctrl Addr
Tag Ctrl
TIO [0..7]
Ctrl
Control
Address/Data
Control
Address
Data
ISA BUS
Universal Serial Bus
Fig. 1-4 PX5N/TX5N System block diagram
Chapter 1 Introduction of PX5N/TX5N Features
1-11
Installing the Mainboard 2-1
Chapter 2 Installing the
Mainboard
This PX5N/TX5N mainboard not only can be used with all standard
equipment for traditional personal computers, but also provides great flexibility
for meeting future upgrade demands. This chapter will introduce step by
step all the standard equipment and will also present, as completely as possible
future upgrade capabilities. This mainboard is able to support all Intel
Pentium chips including P55C with MMX, Cyrix 6x86, 6x86L, 6x86MX and
AMD-K5/K6 processors now on the market. (For details, see specifications
in Chapter 1.) However, we cannot guarantee the description given in this
manual of the circuitry of your mainboard will work for processors not listed in
Chapter 1. For example, the operating voltage of Cyrix’s next generation
CPU is unknown at present. Thus we were not able to include these
specifications in your motherboard. We will supply further information
about CPU support when new CPUs arrive on the market.
This chapter is organized according the following features:
ΠStandard external connectors
• Jumpers and switches
Ž Presentation and Installing of the CPU.
• Installing the system memory.
NNNN
Before proceeding with the installation
Before installing the mainboard please be sure to turn off or disconnect the
power supply unit. Before making any modifications to the hardware
configuration of the mainboard, the power supply to any areas of the mainboard
you plan to modify should be turned off to avoid unnecessary damage to the
hardware.
2-2 Chapter 2
&
User friendly instructions
Our objective is to enable the novice computer user to perform the
installation by themselves. We have attempted to write this document in a
very clear, concise and descriptive manner to help overcome any obstacles you
may face during installation. Please read our instructions carefully and
follow them step-by-step.
Installing the Mainboard 2-3
Knowledge
¬
Installing the Mainboard to the Casing
Most computer cases will have a base on which there will be many mounting
holes that allows the mainboard to be securely attached and at the same time,
prevents short circuits.
There are two ways to attach the mainboard to the base.
l with spacers
l or with bolts
In principle, the best way to attach the motherboard is with bolts, and only if
you are unable to do this should you attach the board with spacers. Take a
careful look at the mainboard and you will see many mounting holes on it. Line
these holes up with the mounting holes on the base. If the holes line up, and
there are screw holes this means you can attach the mainboard with bolts. If the
holes line up and there are only slots, this means you can only attach the
mainboard with spacers. Take the tip of the spacers and insert it into the slots.
After doing this to all the slots, you can slide the mainboard into position aligned
with the slots. After the mainboard has been positioned, check to make sure
everything is OK before putting the casing back on.
Note: If the mainboard has mounting holes, but don’t line up with the holes
on the base and their are no slots to attach the spacers, don’t panic, you can still
attach the spacers to the mounting holes. Just cut the spacers (along the dotted
line) (the spacer may be a little hard so be careful of our hands). In this way you
can still attach the mainboard to the base without worrying about short circuits.
Computer
Why is it that Cyrix is always raised in relation to IBM in books? In
fact, these two 6*86 CPUs (limited to the 6*86 series) are basically
the same thing. Because Cyrix does not have its own production line,
it has contracted IBM to manufacture their 6*86 CPUs for them.
However, IBM has stipulated that the Cyrix CPUs they produce
have both the Cyrix and IBM mark printed on it.
2-4 Chapter 2
-
Standard External Connectors
Inside the case of any computer several cables and plugs have to be
connected. These cables and plugs are usually connected one-by-one to
connectors located on the mainboard. You need to carefully pay attention to
any connection orientation the cables may have and, if any, notice the position of
the first pin of the connector. In the explanation that follows, we will
describe the significance of the first pin.
PN1 - Keylock connector Please pay attention to pin position and orientation
This connector has a specific orientation. Connect the five-thread keylock
connector cable to the PN1 connector pins on the mainboard.
Pin number Name or significance of signal
1 +5VDC power LED
2 No connection power LED
3 Ground power LED
4 Keyboard inhibit Signal key lock
5 Ground key lock
Installing the Mainboard 2-5
Knowledge
Computer
This disables the keyboard so that unauthorized persons cannot
use it. When this function is in use, you will need to use
the unlock key to activate the keyboard.
PN1 - Power ON/OFF switch
There is no specific orientation. Since most cases do not support this feature,
most of you should ignore this instruction.
The “keylock switch” is used to lock the computer’s keyboard.
Pin number Name or significance of the signal
10 Power on/off
11 Ground
PN1 - SMI Switch
There is no specific orientation. Connect the two-thread cable to the PN1
connector pins on the mainboard. Since most cases do not support this
feature, most of you should ignore this instruction. Furthermore, this feature
is not necessary as it is already a part of the mainboard.
Pin number Name or significance of signal
13 +VDD
14 Suspend
PN1 - HDD LED connector
This connector has a specific orientation. Connect the two-thread IDE LED
connector cable attached to the case to the IDE LED connector on the
mainboard.
Pin number Name or significance of signal
7 LED’s Cathode
8 LED’s Anode
PN2 - Speaker connector
There is no specific orientation. Connect the four-thread speaker cable to
the PN2 connector pins on the mainboard.
Pin number Name or significance of signal
4 +5VDC
5 Ground
6 Ground
7 Sound Signal
2-6 Chapter 2
PN2 - Hardware Reset connectors
There is no specific orientation. Connect the two-thread hardware reset
cable to the PN2 connector pins on the mainboard.
Pin number Name or significance of signal
1 Hardware reset signal
2 Ground
PN2 - Sleep LED connector
This connector has a specific orientation. Connect the two-thread Sleep
LED connector cable attached to the case to the Sleep LED connector on the
mainboard.
Pin number Name or significance of signal
9 LED’s Cathode
10 LED’s Anode
FAN1 - CPU Fan power connector (PX5N)
This has a specific orientation. Connect the three-threads CPU fan cable to the
FAN1 connector.
Pin number Name of the signal or signification
1 Ground
2 +12V
3 Ground
FAN1 - CPU Fan power connector (TX5N)
This has a specific orientation. Connect the three-threads CPU fan cable to the
FAN1 connector. FAN2 and FAN3 are the same. You can connect them to the
heat sink.
Pin number Name of the signal or signification
1 Sensor signal
2 +12V
3 Control on/off
If, at the bottom of the fan, there are only two threads, just connect them to
PIN2 and PIN3.
Installing the Mainboard 2-7
IR - Infrared remote Connectors Watch
the pin number and the orientation
This has a specific orientation. Your mainboard supports this feature, but you
must buy the infrared remote device as an option.
Pin number Name of the signal or signification
1 +5VDC
2 No connection
3 Receive data
4 Ground
5 Transmit data
ATXPWR - ATX Power input Connectors
These have a specific orientation. The three warning marks indicate that if you
make a mistake in pin number or connection orientation, you could destroy your
equipment. During installation, you just need to connect to the correct pins and
in the correct orientation, and to connect the power supply unit to the connector
on the mainboard.
Pin number
1 +3.3VDC 11 +3.3VDC
2 +3.3VDC 12 -12VDC
3 Ground 13 Ground
4 +5VDC 14 PS_ON
5 Ground 15 Ground
6 +5VDC 16 Ground
7 Ground 17 Ground
8 POWERGOOD 18 -5VDC
9 +5VDC 19 +5VDC
10 +12VDC 20 +5VDC
Name of the signal or
signification
Pin number
Name of the signal or
signification
2-8 Chapter 2
P8/P9 - AT Power input Connectors
These have a specific orientation. The three warning marks indicate that if you
make a mistake in pin number or connection orientation, you could destroy your
equipment. During installation, you just need to connect to the correct pins and
in the correct orientation, and to connect connectors P8 and P9 of the power
supply unit to the connectors on the mainboard.
Pin number
1 POWERGOOD 7 Ground
2 +5VDC 8 Ground
3 +12VDC 9 -5VDC
4 -12VDC 10 +5VDC
5 Ground 11 +5VDC
6 Ground 12 +5VDC
Name of the signal or
signification
Pin number
Name of the signal or
signification
Mechanics of
Mouse/Keyboard/USB/COM1/COM2/L
PT (AX5N)
Installing the Mainboard 2-9
Mouse - PS/2 Mouse connector Watch the pin number and the orientation
This has a specific orientation. Connect the six-threads PS/2 Mouse cable
provided to the connector on the mainboard.
Pin number Name of the signal or signification
1 Mouse data
2 No connection
3 Ground
4 +5VDC
5 Ground
6 Mouse clock
The “PS/2 Mouse Port” is
Computer
knowledge
different from COM1 or COM2 serial ports to which you can
also connect a Mouse. This mainboard features an extra PS/2
Mouse port, so when you buy a mouse, be sure that it is a PS/2
Mouse before connecting it to this port. But if you cannot find
any PS/2 Mouse, you can still use COM1 or COM2 to connect
a serial mouse to your computer.
KB1 - Keyboard Connector (PX5N/TX5N)
This has an orientation pin. Connect your keyboard connector to the connector
on the mainboard.
Pin number Name of the signal or signification
1 Keyboard clock
2 Keyboard data
3 No connection
4 Ground
5 +5VDC
2-10 Chapter 2
I/O Port connectors Watch the pin number and the orientation
Connector name Pin number Name of the peripheral connected
IDE 1 40 IDE Channel 1
IDE 2 40 IDE Channel 2
FDC 34 Floppy Disk connector
LPT 26 Parallel port connector
COM1 10 Serial port COM1 connector
COM2 10 Serial port COM2 connector
USB 16 Universal Serial Bus connector
LM1 - Enhanced Intelligent System Coller Architecture Connectors
(TX5N)
This has an orientation pin. Connect your EISCA connector to the connector on
the mainboard.
Pin number Name of the signal or signification
1 I2C Serial Bus Clock
2 I2C Serial Bus Data
3 Set for active low for wire interrupt line
4 Key
5 +5VDC
6 Alarm speaker output
7 Ground
8 Vcore detect
9 fan1 sensor input
10 Vio detect
11 fan2 sensor input
12 +12VDC
Installing the Mainboard 2-11
®
Jumpers and Switches
CCMOS : Delete the contents of the CMOS
This jumper is set on pins 1 and 2 at the factory in order for the
computer to function normally, so please do not change this setting.
The main feature of this jumper is to solve situations where the
computer crashes due to improper usage. For example:
l You have forgotten the password you set.
l You have inappropriately changed the settings in the BIOS
menu.
l You want to change the flash BIOS version.
All these errors are very serious, you must avoid them. But if you
have made one of these errors, this jumper can save your life. First
turn off the power supply and open the computer case. Place the
jumper on pins 2 and 3 in order to save your computer. But if you use
your computer normally, you should not need to use this feature.
After you have deleted the CMOS information, the computer is saved, but
you still have to go back to the BIOS Setup menu, and reset one by one all
the specifications: CPU, date, hour, FDD and HDD parameters. etc., before
your computer will return to normal operation.
2-12 Chapter 2
¯
Presentation and Installation of the CPU
Since 1996, every two or three months, Intel adds new models to the
Pentium CPU series. That is why the CPU market is filled with a lot of different
models and brands. All CPUs have different electrical specifications. That’s why
installing a CPU is becoming more and more complex. You can’t help that,
because everybody wants to be able to upgrade their hardware. So, you have to
take a bit of time to read this section, in order to be able to install a cheaper and
better processor.
The AX5N/PX5N/TX5N mainboard does not only support all the CPUs
listed in the specifications, but also has reserved several circuits in order to be
able to support future processors. But before we go further in our presentation,
we must clarify that “we have only tested the CPUs listed in Chapter 1”, we
cannot guarantee that this board will be able to support future products, because
we cannot forecast future developments. But we will do our best to support any
possible CPU.
Related terminology :
External clock
Also referred to as the external CPU clock, or “Bus clock”, it is the input
clock of the CPU. For instance, Intel Pentium P90, P120 and P150 all have
a 60MHz external CPU clock, but have different internal clock multiplier
factors.
Clock multiplier factor
The real operation clock within the CPU is the multiple of the external
clock. We refer to this factor as the clock multiplier factor. The four
factors possible are 1.5, 1.75, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5. The factor
differs from one CPU to another. For instance, the Intel Pentium 166 CPU
has a 66MHz external clock, with a multiplier factor of 2.5, so that the
speed of the internal clock is 66MHz x 2.5.
Internal clock
Also referred to as the real internal CPU clock, it is the actual internal
operating clock of the CPU. The Internal Clock is a multiple of the external
clock and of the clock multiplier factor. For instance, the Intel Pentium 90
CPU has a 60MHz external clock and its clock multiplier factor is 1.5; the
Intel Pentium P133 CPU has a 66MHz external clock and its clock
multiplier factor is 2.
Internal CPU clock = clock multiplier factor * external CPU clock
Installing the Mainboard 2-13
AT Bus clock
Also referred to as ISA SPEED, or AT CLOCK, or even ISA Bus clock.
Ten years ago, the original specification of AT Bus clock installed in the
first generation PC/AT computers was 8MHz, this means that there are
some interface cards which can only work at 8MHz. In order to guarantee
compatibility with older hardware, we still support 8MHz AT Bus clock,
but if your interface card is newer or faster, you can choose a higher speed
for the AT Bus clock, in order to increase the transmission rate of the
interface cards. But we recommend you not be too ambitious. An 8MHz
setup ensures maximum compatibility.
CPU Voltage - Vcore and Vio
From the voltage point of view, 586 series CPU can be divided into two
categories: single voltage CPU and dual voltage CPUs. Single voltage
CPUs include: Intel Pentium P54C series, AMD-K5 and Cyrix 6x86, etc.
Dual voltage CPUs include: Intel P55C with MMX, future AMD-K6 CPUs,
Cyrix 6x86L and 6x86MX.
The voltage of dual voltage CPUs has two components: Vcore and Vio.
Vcore provides all the power for internal processing, and its power
consumption is quite important. Vio provides the power necessary for the
external interface of the CPU.
2-14 Chapter 2
P-Rating
The P-Rating was defined by some manufacturers other than Intel to rate
the performance of their CPU in comparison with Intel Pentium CPUs. For
instance, Cyrix 6x86 P166+ has a higher actual speed compared with Intel
Pentium P166, its internal clock needs only 133MHz versus 166MHz for
Intel’s product. The main reason is that Cyrix has improved the internal
architecture of the 6x86 CPU, which means that with the same internal
clock speed, the actual clock speed will be different.
Having read the related terminology above, please refer to the information in
appendices B, C or D for the type and specifications of your own CPU. We
suggest you note these specifications, which will help you when you install the
CPU.
Voltage and Frequency Setup
PX5N/TX5N uses DIP switches to setup the CPU Frequency and voltage.
Please make sure which kind of CPU and its frequency and voltage before
you setup.
There are two DIP switches on the mainboard, one is use to setup the CPU
frequency (including external clock and rating parameter) which is called
SW1, another one is SW2 which is used to setup the CPU voltage.
1. AX5N/PX5N/TX5N CPU frequency setting (SW1)
The following tables will present the adjustment for the 586 CPU series.
Please setup the correct adjustment regarding the CPU type and brand.
Installing the Mainboard 2-15
50MHzONONON60MHzONONOFF66.6MHzONOFFONTestONOFFOFF55MHzOFFONON75MHzOFFONOFF83.0MHzOFFOFFON68.4MHzOFFOFFOFF
Clock Chip:PLL52C61-01H (PX5N/TX5N)
External Clock DS6 DS7 DS8
Intel CPU (PX5N/TX5N)
Intel
Pentium/with
MMX
P75 50MHz 75MHz OFF OFF OFF OFF OFF ON ON ON --- --- --P90 60MHz 90MHz OFF OFF OFF OFF OFF ON ON OFF --- --- --P100 66MHz 100MHz OFF OFF OFF OFF OFF ON OFF ON OFF OFF OFF
P120 60MHz 120MHz ON OFF OFF OFF OFF ON ON OFF --- --- --P133 66MHz 133MHz ON OFF OFF OFF OFF ON OFF ON OFF OFF OFF
P150 60MHz 150MHz ON ON OFF OFF OFF ON ON OFF --- --- --P166 66MHz 166MHz ON ON OFF OFF OFF ON OFF ON OFF OFF OFF
P200 66MHz 200MHz OFF ON OFF OFF OFF ON OFF ON OFF OFF OFF
P233 66MHz 233MHz OFF OFF OFF OFF OFF ON OFF ON OFF OFF OFF
External
Clock
Internal
Clock
External Clock
Factor
DS1 DS2 DS3 DS4 DS5 DS6 DS7 DS8 DS6 DS7 DS8
Reserve External Clock Frequency
Normal Turbo
2-16 Chapter 2
AMD CPU (PX5N/TX5N)
AMDK5/K6
K5-PR75 50MHz 75MHz OFF OFF OFF OFF OFF ON ON ON --- --- --K5-PR90 60MHz 90MHz OFF OFF OFF OFF OFF ON ON OFF --- --- --K5-PR100 66MHz 100MHz OFF OFF OFF OFF OFF ON OFF ON OFF OFF OFF
K5-PR120 60MHz 90MHz OFF OFF OFF OFF OFF ON ON OFF --- --- --K5-PR133 66MHz 100MHz ON OFF OFF OFF OFF ON OFF ON OFF OFF OFF
K5-PR150 60MHz 120MHz ON ON OFF OFF OFF ON ON OFF --- --- --K5-PR166 66MHz 133MHz ON ON OFF OFF OFF ON OFF ON OFF OFF OFF
K6-166 66MHz 166MHz ON ON OFF OFF OFF ON OFF ON OFF OFF OFF
K6-200 66MHz 200MHz OFF ON OFF OFF OFF ON OFF ON OFF OFF OFF
K6-233 66MHz 233MHz OFF OFF OFF OFF OFF ON OFF ON OFF OFF OFF
K6-266 66MHz 266MHz ON OFF ON OFF OFF ON OFF ON OFF OFF OFF
K6-300 66MHz 300MHz ON ON ON OFF OFF ON OFF ON OFF OFF OFF
External
Clock
Internal
Clock
External Clock
Factor
DS1 DS2 DS3 DS4 DS5 DS6 DS7 DS8 DS6 DS7 DS8
Reserve External Clock Frequency
Normal Turbo
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