Powerleap PL/586 133 User manual

P
OWERLEAPPL/586-133
Processor Upgrade
--for-
486DX4, 486DX2, 486DX, 486SX2 and 486SX Systems
Installation Guide

Copyright 1995-1997
All Rights Reserved.
October 1997
v1.01, February 2000
The information in this document is subject to change without prior notice in order to improve reliability,
design and function and does not represent a commitment on the part of the manufacturer.
In no event will the manufacturer be liable for direct, indirect, special, incidental, or consequential damages
arising out of the use or inability to use the product or documentation, even if advised of the possibility of
such damages.
Product names mentioned herein are used for identification purposes only and may be trademarks and/or
registered trademarks of their respective companies.

Table of Contents i
PowerLeap™ Installation Guide
Table of Contents
TABLE OF FIGURES II
INTRODUCTION 1
Special Features 2
What You Have 3
Electrostatic Discharge Precautions 3
INSTALLING POWERLEAP™PL/586-133 5
Getting Started 5
Locating Pin 1 6
Identifying the CPU Configuration & Choosing an Installation Option 7
Option #1: Socketed CPU 8
Option #2: Socketed CPU with Overdrive Socket 9
Option #3: Surface-Mounted 80486SX CPU with 80487SX Socket 10
Option #4: Surface-Mounted CPU with Overdrive Socket 11
Opening Your Computer & Locating the CPU 12
Removing the CPU 12
Setting the SW1 DIP Switch 14
SW1 Position 1: CPU Socket Type Selection 15
SW1 Position 2: WB/WT Selection 15
SW1 Position 3: Clock Multiplier for AMD X5-133 CPU 16
Setting the JP1 Jumper Switch 17

ii Table of Contents
PowerLeap™ Installation Guide
Orienting & Inserting PowerLeap™ 18
Inserting PowerLeap™ in a Standard or 80487SX Socket 19
Inserting PowerLeap™ in a ZIF Socket 19
Connecting the Cooling Fan to a Power Source 20
Completing Installation 20
TROUBLESHOOTING 21
RUNNING THE LANDMARK SYSTEM SPEED TEST 25
Test Switches 25
Table of Figures
Figure 1. Locating pin 1 ____________________________________________________________ 6
Figure 2. Socketed CPU ____________________________________________________________ 8
Figure 3. Socketed CPU with Overdrive socket __________________________________________ 9
Figure 4. Surface-mounted 80486SX CPU with 80487SX socket ____________________________ 10
Figure 5. Surface-mounted CPU with Overdrive socket ___________________________________ 11
Figure 6. Removing the CPU (standard and ZIF sockets)__________________________________ 13
Figure 7. The PowerLeap™ PL/586-133 SW1 DIP switch ________________________________ 14
Figure 8. Orienting and inserting the processor upgrade (standard and ZIF sockets)_____________ 18

Introduction 1
PowerLeap™ Installation Guide
Introduction
Your PowerLeap™ PL/586-133 is a clock- tripled/quadrupled processor upgrade for
80486SX/SX2, 80486DX/DX2, and 80486DX4 computers. The PowerLeap™
processor upgrade uses the AMD X5-133 CPU (Am5x86-P75 CPU). PowerLeap™
installs directly into your computer’s existing CPU socket or, if you cannot remove the
original CPU, into an Intel Overdrive or 80487SX socket. Please contact your dealer for
more information about the CPU.
Before installing the PowerLeap™ processor upgrade, we
recommend setting your motherboard’s onboard clock frequency to
33MHz for the BEST Performance. For more information, refer to
your motherboard’s documentation or contact your system vendor.
The following table shows the original CPU speed, the processor upgrade speed, and the
type of CPU required.
Original CPU & Speed Upgrade Speed CPU Type
80486DX4-100*** 133MHz (33x4)
80486DX4-75*** 100MHz (25x4)
80486DX2-80*** 120MHz* (40x3)
80486DX2-66** 133MHz (33x4) AMD X5-133
80486DX2-50 100MHz (25x4) (Am5x86™-P75)
80486DX-50 ****
80486DX-40 120MHz* (40x3)
80486SX/DX-33 133MHz (33x4)
80486SX/DX-25 100MHz (25x4)

2 Introduction
PowerLeap™ Installation Guide
*You must set the SW1 DIP switch to run the CPU at triple or quadruple speed. For details, see the
section “Setting the SW1 DIP Switch” later in this guide.
** There are two versions of the 486DX2-66 CPU: 5V and 3.3V/3.45V. You can use the JP1 jumper
switch on the Power Leap™ upgrade to select the correct voltage. For more information, see the
section “Setting the JP1 Jumper Switch” later in this manual.
*** You must use the JP1 jumper switch on the PowerLeap™ upgrade to select the 3.3V/3.45V CPU
voltage setting. For more information, please see the section “Setting the JP1 Jumper Switch” later in
this manual.
**** Please change the motherboard’s onboard clock frequency to 33MHz.
For 80486-20 systems, the PowerLeap™ upgrade will by default
operate at 60MHz (clock-tripled mode) or 80MHz
(clock-quadrupled mode). To change the system to 100/133MHz
performance, you must modify the onboard clock frequency (for
information, refer to your mainboard’s documentation or contact
your system vendor).
Special Features
PowerLeap™ PL/586-133 offers the following advanced features:
• Clock- tripled/quadrupled 5x86 CPU running at 100MHz or 133MHz
• Supports AMD CPU with 32-bit internal and external processing
• Supports AMD CPU with 16KB internal cache
• Quick and easy installation, with no software drivers to install
• Installs directly into your computer’s existing CPU socket, Intel Overdrive socket, or
80487SX socket
• Includes the Landmark System Speed Test® for testing the performance of your
computer before and after PowerLeap™ installation

Introduction 3
PowerLeap™ Installation Guide
What You Have
In addition to this Installation Guide, your Power Leap™ package includes:
• PowerLeap™ PL/586-133 processor upgrade
• Heat sink and cooling fan
• Software distribution floppy disk including the Write Back Cache Driver and the
Landmark System Speed Test®
If any of these items is missing or damaged, contact the dealer from whom you purchased
PowerLeap™. Save the packing materials for future use.
Leave the PowerLeap™ processor upgrade in its original packing
until you are ready to install it.
Electrostatic Discharge Precautions
Follow these precautions to protect your investment from electrostatic discharge:
• Before handling the processor upgrade, discharge any static electricity in your
body by touching a metal surface on the computer’s case, expansion slot
covers or any other unpainted portion of the computer chassis. This will
discharge any static charge from your body.
• Remove the processor upgrade from its anti-static packaging only when you are ready
to install it in your computer.
• Handle the processor upgrade or the CPU by the edges and avoid touching its pins.

4 Introduction
PowerLeap™ Installation Guide

Installing PowerLeap™ PL/586-133 5
PowerLeap™ Installation Guide
Installing PowerLeap™PL/586-133
The PowerLeap™ PL/586-133 processor upgrade can be installed in a wide variety of
486SX/SX2, 486DX/DX2, and 486DX4 computers. The installation process will
depend on your computer’s CPU configuration.
Getting Started
To compare the performance increase provided by PowerLeap™, we suggest running the
Landmark System Speed Test both before and after installation. For details, see “Running
the Landmark System Speed Test” later in this guide.
Before beginning the installation, you need to:
a) locate pin 1 on the PowerLeap™ processor upgrade and the motherboard’s
processor socket;
b) identify your computer’s CPU configuration;
c) choose an installation option;
d) set the SW1 DIP switch; and
e) set the JP1 jumper switch for 3.3V/3.45V operation for 486DX4-75/100,
486DX2-80 and 486DX2-66 (3.3V/3.45V CPUs only)
Please take a moment to read the descriptions below.
If you are not familiar with computer architecture, we recommend
asking an experienced technician or advisor to help install the
PowerLeap™ PL/586-133.

6 Installing PowerLeap™ PL/586-133
PowerLeap™ Installation Guide
Locating Pin 1
When you install the processor upgrade, pin 1 must be installed in the pin 1 hole of the
motherboard’s CPU socket. The pin 1 corner of the processor upgrade is indicated by a
triangular tab.
Pin 1Pin 1
Pin 1Pin 1
Figure 1. Locating pin 1

Installing PowerLeap™ PL/586-133 7
PowerLeap™ Installation Guide
Identifying the CPU Configuration & Choosing an Installation
Option
Before continuing, determine your computer’s CPU configuration:
• Surface-mounted: the CPU is soldered directly to the motherboard
• Socketed: the CPU is inserted in either a standard or ZIF socket
The PowerLeap™ offers several installation options to match your computer’s CPU
configuration. For socketed configurations, you can remove the computer’s original CPU
and install the processor upgrade in the CPU socket. If the CPU is surface-mounted, you
will not be able to remove it from the motherboard. In this case, you can install the
processor upgrade in the board’s Overdrive or 80487SX socket.

8 Installing PowerLeap™ PL/586-133
PowerLeap™ Installation Guide
Option #1: Socketed CPU
For this option, remove the computer’s original CPU and install the PowerLeap™
processor upgrade in the computer’s original CPU socket.
Figure 2. Socketed CPU
Before installing the PowerLeap™ processor upgrade, make sure that position 1 of SW1
is OFF.

Installing PowerLeap™ PL/586-133 9
PowerLeap™ Installation Guide
Option #2: Socketed CPU with Overdrive Socket
For this option, remove the computer’s original CPU and install the PowerLeap™
processor upgrade in the computer’s original socket (refer to the figure below). The
Overdrive socket is not used.
Figure 3. Socketed CPU with Overdrive socket
Before installing the PowerLeap™ processor upgrade, make sure that position 1 of SW1
is OFF.

10 Installing PowerLeap™ PL/586-133
PowerLeap™ Installation Guide
Option #3: Surface-Mounted 80486SX CPU with 80487SX Socket
For this option, install the PowerLeap™ processor upgrade in the computer’s 80487SX
socket (refer to the figure below). You will not be able to remove the surface-mounted
80486SX CPU from the motherboard.
Figure 4. Surface-mounted 80486SX CPU with 80487SX socket
Before installing the PowerLeap™ processor upgrade, make sure that position 1 of SW1
is ON.
When you install the PowerLeap™ in the 80487SX socket, you may
have to set jumper switches for the socket on the motherboard (see
the documentation that came with the board).

Installing PowerLeap™ PL/586-133 11
PowerLeap™ Installation Guide
Option #4: Surface-Mounted CPU with Overdrive Socket
For this option, install the PowerLeap™ processor upgrade in the computer’s Overdrive
socket (refer to the figure below). You will not be able to remove the surface-mounted
CPU from the motherboard.
Figure 5. Surface-mounted CPU with Overdrive socket
Before installing the PowerLeap™ processor upgrade, make sure that position 1 of SW1
is ON.
When you install the PowerLeap™ in the Overdrive socket, you may
have to set jumper switches for the socket on the motherboard (see
the documentation that came with the board).

12 Installing PowerLeap™ PL/586-133
PowerLeap™ Installation Guide
Opening Your Computer & Locating the CPU
1 Turn the computer off and disconnect all power cables from the computer.
2 Remove the cover from the computer (as described in the computer’s
documentation).
3 Locate the CPU on the computer’s motherboard. The CPU will be clearly labeled
with the manufacturer’s name (such as “Intel”), and markings identifying the CPU
model and speed (such as 80486DX2-66).
Static electricity can damage the electronic components of the
computer or optional equipment. Before the following procedures,
ensure that you are already discharged of static electricity.
Removing the CPU
If your computer’s CPU is socketed (see the earlier section of this chapter), remove it as
described below.
1 Make sure that the motherboard’s CPU socket is readily accessible. If the socket is
located under an expansion card or disk drive, you may have to remove the card or
drive.
2 Note the orientation of the pin 1 hole on the CPU socket. This hole will typically be
identified by a dot, beveled edge, or other marking.

Installing PowerLeap™ PL/586-133 13
PowerLeap™ Installation Guide
3 Remove the CPU:
• If the CPU is installed in a standard socket, carefully insert a flat-bladed
screwdriver between the CPU and the socket. Gently lever one side of the
CPU up slightly (refer to the figure below). Do not attempt to pry the CPU out of
the socket. Repeat for each side of the CPU, working around the CPU until the
pins are sufficiently exposed to allow you to lift the CPU out of the socket. Be
careful not to break the pins.
• If the CPU is installed in a ZIF socket, unlatch the sidebar lever, retaining screw,
or overhead bar. When the CPU is loosened, lift it out of the socket with your
fingers.
Figure 6. Removing the CPU (standard and ZIF sockets)
After removing the CPU, store it in the PowerLeap™ packaging.

14 Installing PowerLeap™ PL/586-133
PowerLeap™ Installation Guide
Setting the SW1 DIP Switch
Before installing the processor upgrade, you must set the SW1 DIP switch on the
PowerLeap™. You can find SW1 on the top of the Power Leap™ PL/586-133. The SW1
DIP switch is shown in the following figure and described below.
Figure 7. The PowerLeap™ PL/586-133 SW1 DIP switch
!"Position 1 : allows you to choose an installation option (see descriptions earlier in this
chapter).
!"Position 2 : lets you select write-through (WT)/write-back (WB) for the AMD
X5-133 CPU.
!"Position 3 : lets you change the clock multiplier for the AMD-X5-133 CPU.

Installing PowerLeap™ PL/586-133 15
PowerLeap™ Installation Guide
SW1 Position 1: CPU Socket Type Selection
The PowerLeap™ offers several installation options to match your computer’s CPU
configuration. Before installing the processor upgrade, you must specify the selected
socket type by setting position 1 of the SW1 DIP switch. This position is set to OFF by
default.
Socket Type Position 1 Setting
486SX/SX2/DX/DX2/DX4
ZIF or PGA socket
Overdrive or 80487SX socket
SW1 Position 2: WB/WT Selection
The SW1 position 2 is set to OFF by default.
WB/WT Select Position 2 Setting
Write-back*
Write-through
* Some older motherboard designs do not support write-back CPUs (only boards that have the socket 3
CPU socket support the WB CPU). If your board does not offer this support, the Power Leap™
performance may be unstable in write-back mode. Set the processor upgrade to write-through mode
instead.

16 Installing PowerLeap™ PL/586-133
PowerLeap™ Installation Guide
If your system board doesn’t support the WB function (without the
socket 3 CPU socket), the system BIOS will automatically set the
CPU to run in WT mode.
SW1 Position 3: Clock Multiplier for AMD X5-133 CPU
The PowerLeap™ is a clock- tripled/quadrupled processor upgrade for 80486SX/SX2,
80486DX/DX2, and 80486DX4 computers. By default, the processor upgrade is set to
clock-quadrupled mode.
Clock Multiplier Position 3 Setting
4x (clock-quadrupled)*
3x (clock-tripled)
* Clock-quadrupled for AMD X5-133.