Updated: Thursday, March 27, 1997

Contents
For technical support, contact your place of purchase -- which will have the most current information about your specific product or configuration. You also can check the Intel FAQ for that product.

• What Pentium® Pro processors are supported on the PR440FX?
• What type of second Pentium Pro processor should be used on the PR440FX?
• When does the Intel VRM need to be used?
• What upgrade components can be installed on the PR440FX?
• How should the switches and jumpers be set on my motherboard?
• Why does my PR440FX not power-up?
• Is it possible to have a second serial port on the PR440FX?
• Why doesn't my CD-ROM or second IDE hard drive work with Windows* 95?
• Where can I get the Motherboard Specification Update?
• How do I disable the onboard audio, USB or Hardware monitor?
• Why is there a yellow question mark under 'Other devices' when setting up Windows* 95 on the PR440FX motherboard?
• What is the function of jumper J10L1 and how should it be configured?
• Can a SCSI drive be connected to the front hard drive activity LED?
• What are the dimensions and where are the mounting holes located on the PR440FX motherboard?

Frequently Asked Questions: PR440FX

• What Pentium(r) Pro processors are supported on the PR440FX?
  The PR440FX motherboard supports Pentium® Pro processors with VID at 180 or 200 Mhz. Changing the processor requires changes in several jumper settings. If two Pentium ® Pro processors are used, both must be the same speed, stepping and cache size.
  

• What type of second Pentium Pro processor should be used on the PR440FX?
  The second Pentium Pro processor on the PR440FX motherboard must be the same speed, stepping and cache size as the first processor. If an ATX chassis is used, the second Pentium Pro processor will need a fan sink with an integral tachometer in the fan for cooling.
  

• When does the Intel VRM need to be used?
  The VRM is only needed when a second Pentium Pro processor is used. If you wish to use a custom VRM, the requirements are specified in the Technical Product Specification. A VRM may be supplied with your motherboard or available at your place of purchase.
  

• What upgrade components can be installed on the PR440FX?
  The PR440FX will accept processor upgrades, various combinations of system memory and the battery/real time clock can be replaced. System memory on the PR440FX is gold plated buffered 3.3V DIMMs.
  

• How should the switches and jumpers be set on my motherboard?
  On-board switches and jumpers control the configuration options and other features of the motherboard. Check the jumpers document for the PR440FX motherboard.
  

• Why does my PR440FX not power-up?
  The PR440FX requires 3.3 volts from the power supply. Additionally, there are some specific requirements for the power sequencing and limits. A momentary switch should be used for the for the power on/off switch and the sleep/resume switch. Please refer to the PR440FX Motherboard Technical Product Specification and order the PR440FX Motherboard Specification Update from the Intel Literature department for more details.
  

• Is it possible to have a second serial port on the PR440FX?
  The PR440FX has one serial port connector located on the back edge of the ATX board. The second serial port is routed to a 10-pin header on the motherboard. This header allows a suitable cable and connector to provide a second serial port. The BIOS also should be set to enable the second serial port. See the Technical Product Specification for details.
  

• Why doesn't my CD-ROM or second IDE hard drive work with Windows* 95?
  There are two known issues involving CD-ROM or secondary hard drives:
  • The retail version of Microsoft Windows 95 may not recognize the Intel 82371SB PIIX3 IDE controller used on Intel motherboards, causing the BIOS to disable the secondary IDE channel. This can result in IDE devices (such as CD-ROM drives) not being detected or disappearing after the system is rebooted. A utility is available to update the MSHDC.INF file and resolve the issue.
  • Windows 95 also may fail to recognize a CD-ROM drive that does not comply with the ATAPI specification. A technical advisory covers this issue for Intel motherboards using the 82371SB PIIX3 IDE controller.
    

• How can the onboard audio, USB or hardware monitor be disabled?
  The onboard audio, USB or hardware monitor can be disabled using the BIOS Setup Utility. Select the Advanced menu, then the Peripherial Configuration screen. The menu will offer options to enable or disable the audio, USB or hardware monitor features, if they are present on the motherboard. Other Setup options may be found in the PR440FX Technical Product Specification.
  

• Why is there a yellow question mark under 'Other devices' when setting up Windows 95 on the PR440FX motherboard?
  This device may represent the USB port. If Windows 95 provides no drivers for USB, the USB port will show up as an unidentified PCI device. Contact Microsoft for driver availability for Windows 95. If you do not require the USB port, it may be disabled in the BIOS setup.
  

• What is the function of jumper J10L1 and how should it be configured?
  Jumper J10L1 is used in manufacturing only and its position does not affect normal operation.
  

• Can a SCSI drive be connected to the front panel hard drive activity LED?
  In order to use an LED indicator with a SCSI device connected to the onboard SCSI subsystem, connect an LED to the Front Panel I/O Header (J12G1), where pin 15 is HD ACTIVE# and pin 13 or 16 is +5V. This signal is driven by the AIC-7880 SCSI controller, as well as the onboard IDE connectors, and needs no additional input from the SCSI device.

  If you want to provide an LED indicator with a SCSI device connected to an add-in SCSI controller, connect an input signal from the SCSI device to the SCSI Hard Drive Front Panel LED Connector (J13G1) using one of pins 3, 4, 5, or 6. Only one signal per device is required. If your SCSI device has a two-pin connector for an LED, the pins will be labeled similar to "Remote LED Active" and "+5V". Connect only the "Remote LED Active" signal to the motherboard. The same LED that is used to indicate activity of the onboard SCSI and the onboard IDE will then signal activity of the additional SCSI device. You may connect up to four SCSI devices to the J13G1 connector.

• What are the dimensions and where are the mounting holes located on the PR440FX motherboard?
  The diagram below shows these dimensions and corrects one error in the PR440FX Technical Product Specification, order number 281829.