American Megatrends MAN-759 manual Connect CPU Fan

Page 12

Step 5 Connect CPU Fan

J6 (shown below) is a 3-pin berg that connects the fan on the CPU heat sink to the motherboard power.

All Pentium II CPUs are shipped with a heat sink and a CPU fan. The connector from the CPU fan usually has three leads (has red, yellow, and black leads). Connect the Red lead to Pin 2 (+12V). Make sure that you use fans that have 3 leads. The 3rd (yellow) lead should provide a tachometer output to permit the fan speed to be monitored by the onboard server management hardware. If you must use fans with only 2 leads, connect the red lead to Pin 2.

J5 and J33 Chassis Fans J5 and J33 are 3-pin bergs that attach to chassis fans. See the motherboard drawing for the J5 and J33 locations. J5 provides +12V power to the main chassis fan. J33 is the auxiliary chassis fan connector. He chassis fan should provide a tachometer output on Pin 3 so the fan speed can be monitored by the onboard server management hardware.

8Pegasus PCI Motherboard User’s Guide

Image 12

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 Configure CPU Speed J16 J17 J18 J19 J21 J22Configure CPU Voltage Core CPU Voltage J5 and J15 SettingJ12 Install Voltage Regulator Manufacturer Part Number AMI Part NumberConnect CPU Fan Install CPU Install MemoryParameter Specification Simm Part NumbersType Manufacturer Part Number Install the Motherboard Connector Attach CablesAttach Cables P2 Pinout P1 PinoutPin Description Cmos Drain J29 Setting P14 PinoutP3 Pinout Pin Assignments Pin Ground Keyboard Lock Kbdinh VCC Pin Signal Description Connect I/OSTROBE# Connect I/O J4 Floppy Connector Pinout Twist in Floppy CablePin Use Connect I/O Connect I/O KEY N/C REQ Install Drivers Pegasus drivers includeTest and Configure Hardware Installation Page Winbios Setup Using a Mouse with Winbios Setup Using the Keyboard with Winbios SetupKeystroke Action Winbios Setup Menu Winbios Setup Windows See SectionSetup Standard SetupDrive Type How to Configure ScsiParameter Description Hard Disk Drive Types 152 MBAdvanced 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 Advanced Power Management APM option to Power Management APM to Enabled and set the powerChipset Setup Chipset Setup Power Management Setup Power Management Setup Power Management Setup IRQ3 IRQ4 IRQ5 IRQ7 IRQ9 IRQ10 IRQ11 IRQ12 IRQ15 PCI/PnP Setup VGA Palette ActionPCI/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 Amibios Password Support SecuritySetting a Password Changing a Password Anti-VirusUtility Original OptimalFail-Safe Programming Flash ROM Programming the Flash EpromProgramming the Flash ROM Number Description Bootblock Code Checkpoint Codes Code DescriptionDeleting a Password Avoid Static Electricity Engineering Specifications Frequency Heat Airflow Temperatur Sink Over CPU Over otherComponent