American Megatrends MAN-759 manual Configure CPU Speed, J16 J17 J18 J19 J21 J22

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Step 2 Configure CPU Speed

J16, J17, J18, and J19 are 2-pin bergs that help set the CPU speed. J21 is a 3- pin berg and J22 is an 8-pin berg that set the CPU speed, as described below. A visual display of the CPU speed jumper settings is shown below.

CPU

J16

J17

J18

J19

J21

J22

Speed

 

 

 

 

 

 

200

Shorted

OPEN

Shorted

OPEN

Short

Short Pins 1-2

MHz

 

 

 

 

Pins 1-2

Short Pins 5-6

 

 

 

 

 

 

Short Pins 7-8

233

Shorted

OPEN

Shorted

OPEN

Short

Short Pin 5-6

MHz

 

 

 

 

Pins 1-2

Short Pin 7-8

266

Shorted

OPEN

Shorted

OPEN

Short

Short Pins 1-2

MHz

 

 

 

 

Pins 1-2

Short Pin 3-4

 

 

 

 

 

 

Short Pin 7-8

300

Shorted

OPEN

Shorted

OPEN

Short

Short Pins 3-4

MHz

 

 

 

 

Pins 1-2

Short Pins 7-8

Important

Please contact American Megatrends technical support at 770-246-8645 to support a CPU running at other speeds.

Chapter 1 Hardware Installation

5

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Contents Pegasus Pentium PCI ISA Motherboard Revision History Preface Phone Number Characteristics American Megatrends BBSPacking List Overview CPUsCPU External Clock Frequency PCI Expansion Slot Frequency Pegasus PCI Dimensions Pegasus PCI Motherboard Layout Unpack the Motherboard Avoid Static ElectricityStep Action J16 J17 J18 J19 J21 J22 Configure CPU SpeedConfigure CPU Voltage Core CPU Voltage J5 and J15 SettingJ12 Manufacturer Part Number AMI Part Number Install Voltage RegulatorConnect CPU Fan Install Memory Install CPUParameter Specification Simm Part NumbersType Manufacturer Part Number Install the Motherboard Attach Cables ConnectorAttach Cables P2 Pinout P1 PinoutPin Description Cmos Drain J29 Setting P14 PinoutP3 Pinout Pin Assignments Pin Ground Keyboard Lock Kbdinh VCC Connect I/O Pin Signal DescriptionSTROBE# Connect I/O J4 Floppy Connector Pinout Twist in Floppy CablePin Use Connect I/O Connect I/O KEY N/C REQ Pegasus drivers include Install DriversTest and Configure Hardware Installation Page Winbios Setup Using a Mouse with Winbios Setup Using the Keyboard with Winbios SetupKeystroke Action Winbios Setup Windows See Section Winbios Setup MenuStandard Setup SetupScsi Drive Type How to ConfigureParameter Description 152 MB Hard Disk Drive TypesAdvanced Setup Setting Description Any optional option ROM messages are displayedOptional option ROM messages are not displayed Advanced Setup Optimal and Fail-Safe default settings are Disabled Cont’d Advanced Setup Disabled Optimal and Fail-Safe default settings are Disabled Chipset Setup Power Management APM to Enabled and set the power Advanced Power Management APM option toChipset Setup Chipset Setup Power Management Setup Power Management Setup Power Management Setup IRQ3 IRQ4 IRQ5 IRQ7 IRQ9 IRQ10 IRQ11 IRQ12 IRQ15 VGA Palette Action PCI/PnP SetupPCI/PnP Setup IRQ3 IRQ4 IRQ5 IRQ7 IRQ9 IRQ10 IRQ11 IRQ12 IRQ14 IRQ15 DMA Channel Peripheral Setup Offboard PCI IDE Primary IRQ Peripheral Setup Peripheral Setup EPP Security Amibios Password SupportSetting a Password Anti-Virus Changing a PasswordUtility Original OptimalFail-Safe Programming the Flash Eprom Programming Flash ROMProgramming the Flash ROM Number Description Code Description Bootblock Code Checkpoint CodesDeleting a Password Avoid Static Electricity Engineering Specifications Frequency Heat Airflow Temperatur Sink Over CPU Over otherComponent