Desktop Boards
Intel® Desktop Board D845PECE
Frequently asked questions

Technical FAQ

General Questions:

  • What processor does the Intel® Desktop Board D845PECE support?
    The Intel® Desktop Board D845PECE supports the Intel® Pentium® 4 processor and the Intel® Celeron ® processor in the uPGA478-pin package. At the time of launch, the Desktop Board D845PECE will support the Intel Pentium 4 processor with a System Bus of 400/533 MHz. The Desktop Board D845PECE will also support the Intel Celeron processor with a 400 MHz System Bus. For the latest supported speeds, please refer to the Processor Support Table.

  • How do I find technical information on the Desktop Board D845PECE?
    Refer to the Intel® Desktop Board D845PESV/D845PECE Technical Product Specification and the Desktop Board Specification Update, which are available on the Desktop Board D845PECE Technical Documentation page.

  • How do I install and secure a processor on the Desktop Board D845PECE?
    The processor installs in the uPGA478-pin package socket connector and the processor's fan heat sink solution secures by attaching to the integrated retention mechanism. Make sure you use an adequate heatsink solution such as that provided with the Boxed Intel Pentium 4 processor or the Boxed Intel Celeron processor.

  • How many expansion slots does the Desktop Board D845PECE contain?
    The Desktop Board D845PECE has three dedicated PCI connectors and one 1.5V only AGP 4x port connector. PCI slot 3 is shared with a Communications Network Riser on the CNR skus. All PCI slots support bus-mastering devices.

  • Does the Desktop Board D845PECE support STR (Suspend-to-RAM)?
    The Desktop Board D845PECE supports STR when used with STR capable: Operating system, add-in card(s), driver(s), and application(s). Operating systems, add-in cards, drivers, and applications that do not support STR can cause unexpected behavior when coming out of different sleep states.

  • Why is my USB device not operating to its specification?
    Each USB port is treated as an independent USB path, and the performance of each USB port is dependent upon the detected USB device(s) within that USB port (point-to-point) device connection. Its performance will be limited to the least capable performance element within that ports connection. For example, if you connect a USB 2.0 high speed device to a USB 1.1 Hub, which is then connected to a USB port on the motherboard that connected USB 2.0 high speed device, will be limited to the performance through that USB 1.1 Hub.
    Refer to the device manufacturer of your USB device for specifications and installation requirements. Additional USB design specifications reference information can be found within the Intel® Desktop Board D845PECE/D845PECE Technical Product Specification.


  • What memory configurations are supported on the Desktop Board D845PECE?
    The Desktop Board D845PECE supports DDR 333 (PC 2700) and DDR 266 (PC2100) SDRAM Memory. There are two DIMM sockets supporting up to two 184-pin DDR SDRAM Dual Inline Memory Modules (DIMMs) with gold-plated contacts. The Desktop Board D845PECE is designed to support a memory range of 64 MB minimum (using 64 Mbit technology) up to 2.0 GB maximum** [See note below] (using 512 Mbit technology) that conforms to the latest Intel JEDEC DIMM specifications.
    NOTE:The Desktop Board D845PECE has been designed to support DIMMs based on 512 Mbit technology for a maximum onboard capacity of up to 2.0 GB, but this technology has not been validated (currently validated up to 1.0 GB using 256 Mbit technology) on this board. Please refer to the memory page for additional information.

  • Can I use ECC DIMMs on the Desktop Board D845PECE?
    No. The Desktop Board D845PECE supports unbuffered non-ECC DIMMs only. ECC DIMMs are not supported as they could potentiality exceed the current limitation of the memory voltage regulators.
    CAUTION: Use of ECC DIMMs on the Desktop Board D845PECE could damage the Desktop Board.

  • What kind of problems might occur in a DDR SDRAM-based system that uses non-compliant DIMMs?
    Extreme memory failures can prevent a system from even booting. This can happen when the system is unable to communicate properly with the memory. In less extreme cases, the memory may generate intermittent errors or fail during stress.

  • I get a repeating-beep error code and my desktop board does not boot or show any video. What does this mean?
    This beep code may indicate a problem during detection of the DDR SDRAM memory device. Check to ensure that system memory is properly installed and that the DIMMs are on the Desktop Board D845PECE tested-memory list.

Instantly Available PC and Power Supplies:

  • What kind of power supply do I need for the Intel® Desktop Board D845PECE?
    The Desktop Board D845PECE requires a power supply that complies with the ATX/ATX12V Power Supply Design Guide Version 1.2 or the SFX/SFX12V Power Supply Design Guide Version 2.2. These design guides are available from*
    The ATX12V or SFX12V power supply required for the Desktop Board D845PECE has the standard 20-pin ATX Main Power Connector, and a 4-pin +12V Aux. Power Connector. The 4-pin +12V power connector has been added to enable the delivery of more +12VDC current to the desktop board. This connector is used by the board to power the processor's voltage regulator module (VRM).
    CAUTION: The system will not boot if there is a failure to use an ATX12V or SFX12V power supply, or a failure to connect the 4-pin +12V power supply lead to the Desktop Board D845PECE.

  • Do I need a special power supply to support Instantly Available PC (Suspend-to-RAM)? How much +5V standby current does the power supply need to support it?
    A special power supply is not needed to support "Instantly Available PC". However, the power supply must provide enough standby current to support the needs of all wake-capable devices in the system. The more wake-capable devices in the system, the greater the standby current required from the power supply. Intel recommends starting with a power supply capable of providing a minimum of 1.5 Amps (2.0 Amps recommended) of +5V standby current. To be sure, total the amount of standby current required by the various components that can wake the system from the STR state. In your calculations, include the components on the Desktop Board D845PECE and on the add-in cards. Make sure the power supply provides at least that amount of standby current. Refer to the Technical Product Specification for information on how much +5V standby current the on-board components of the Desktop Board D845PECE require.

Jumpers/BIOS Setup Options:


  • What add-in AGP cards can be used?
    The D845PECE AGP socket can accept universal AGP cards that comply with the AGP 2.0 specification. The D845PECE can use 1X / 2X / 4X card(s) operating at 1.5V.
    Note: Legacy 3.3V AGP cards are not supported.

  • Can I use the integrated AGP card retention mechanism with any AGP card?
    The integrated AGP retention mechanism is made for use with AGP cards that meet the AGP 2.0 specification. These cards have a special slot at the back of the card that interlocks with a small plastic stud on the retention mechanism. Cards that do not meet the AGP 2.0 specification should not be used, because the small plastic stud may interfere with correct installation and retention of the card.

  • How do I designate an add-in PCI video adapter as my primary video adapter?
    The primary video adapter can be changed from the onboard AGP to an add-in PCI adapter through the BIOS Setup Utility. The setting is located in the Advanced screen under Video Configuration.

On-Board Audio:

  • What audio solution is available on the Desktop Board D845PECE?
    The Desktop Board D845PECE offers integrated audio that uses a portion of the Intel® 82801DB I/O Controller Hub 4 (ICH4) with an Analog Devices* AD1981B analog codec to create the audio subsystem.

  • How can the on-board audio be disabled?
    The on-board audio can be disabled using the BIOS Setup Utility. Select the Advanced menu, then the Peripheral Configuration screen. The menu offers options to enable or disable the audio if it is present on the desktop board. Refer to the Technical Product Specification (TPS) for more details.


  • Does the Desktop Board D845PECE support Ultra ATA/100 hard drives?
    Yes. The Desktop Board D845PECE supports Ultra ATA transfer rates up to 100 MB/sec (ATA/100) by way of the ICH4 IDE controller with two independent bus-mastering IDE interfaces. An Ultra ATA/100 supported hard drive and an 80 conductor IDE cable are required to take advantage of the increased bandwidth available on the IDE channel.
    The Intel Desktop Board D845PECE supports larger ATA/100 capable hard drives with 48-bit Logical Block Addressing (LBA) within the BIOS along with all Ultra ATA transfer rates (i.e., 33 MB/sec, 66 MB/sec and 100 MB/sec). To realize a true throughput performance difference, a hard drive may need to implement higher spindle speeds, such as 7200 RPM, and a large on-board buffer size to take advantage of the increased bandwidth available on the IDE channel.

  • Can I mix Ultra ATA devices with other devices on the same IDE channel?
    Yes, the chipset is capable of supporting independent IDE device timings. Although, if the hard drives are mixed they may run at the slowest Ultra DMA protocol depending on whether you are using the native operating system IDE driver or Intel® Application Accelerator. Intel® Application Accelerator allows each device to run at its optimal timings. Check with your OS provider to see if their native IDE driver supports independent timings for IDE devices. It is recommended that the Ultra ATA/100 drives be attached to the primary IDE channel using a 40-pin 80-conductor IDE cable and that the other drives be attached to the secondary channel using a good quality, 40-pin 40-conductor IDE cable.
    Note: Some Ultra DMA cables use a hole in the ribbon cable as a cable detect mechanism to determine if an Ultra DMA IDE or standard IDE cable is installed.

  • What type of battery is used in the Desktop Board D845PECE?
    A 3 volt, (CR2032) coin cell is used to supply power to the Real Time Clock (RTC) when power is not available from the power supply.

  • Why does my Desktop Board D845PECE system fail to boot?
    The Desktop Board D845PECE has specific requirements for the power sequencing and limits. A momentary switch should be used for the power on/off switch. The power supply chosen must have the additional 4-pin +12 volt connector and meet the ATX12V or SFX12V specification*. If the power supply 2-by-2 connector is not plugged into the board connector located near the processor socket, the system will not boot.

  • How do I disable the onboard LAN?
    Onboard LAN can be disabled through the desktop board BIOS Setup Utility. The setting is located in the Advanced screen under Peripheral Configuration. Refer to the Technical Product Specification (TPS) for more details.

  • Why are the drivers on Intel's public Web site previous revisions of those available on some vendor public Web sites?
    Intel performs internal testing on all drivers before posting them on the Intel developer desktop board Web site. In many cases, it is not practical to test all drivers on all desktop boards. For this reason, application vendors may release drivers that have not been tested by Intel. These drivers may be available on the vendor public site, but not on the Intel public site. This does not mean the drivers do not work; it simply indicates that Intel has not validated the drivers.

  • Does the Desktop Board D845PECE support two serial ports?
    No, the Desktop Board D845PECE has one serial port connector. Serial port A is located on the back panel.

  • Why isn't my IDE device displayed during power-up POST?
    All IDE devices must be ATA4/ATAPI-5 compliant. Cable length is limited to 18 inches. IDE devices not selected as auto-detect in the BIOS Setup Utility are not displayed as part of the POST tests.

  • Can I use a second floppy disk drive on my Desktop Board D845PECE?
    No. The Desktop Board D845PECE uses a SMSC LPC47M102 or National Semiconductor PC87372 SIO component to support the floppy-disk controller. This component and equivalent components can support a single standard legacy type floppy disk drive, either 1.2MB or 1.44MB.

  • What type of front panel USB connector should I use?
    To ensure that Hi-Speed USB devices run at full speed potential, use only a front panel USB connector that conforms to the USB 2.0 specification for Hi-Speed USB devices. Check with the front panel USB connector vendor or chassis vendor to verify USB 2.0 Hi-Speed compliance.

  • Why aren't my USB devices working at all?
    If you are using Microsoft* Windows* XP, and you have disabled "High-Speed USB" in the BIOS Setup Utility, USB may not work properly. To correct this issue, either enable "High-Speed USB", or install Windows XP Service Pack 1, available through*.

Marketing FAQ

General Questions:

  • What new features are incorporated into the Desktop Board D845PECE?
    The Intel Desktop Board D845PECE supports unbuffered non-ECC DDR333 (PC2700) DIMMs, which increase the bandwidth to memory and can help to alleviate system performance bottlenecks.
    Hi-Speed USB 2.0 allows the use of multiple high-bandwidth peripherals ranging from PC cameras to portable storage devices. With 40 times the performance of USB 1.1, users can burn CDs six times faster, backup data 11 times faster, and watch full-motion DVD video at TV quality. Hi-Speed USB 2.0 allows users to make a seamless transition to higher-speed technologies with full plug-and-play capability and complete backwards compatibility. The ease-of-use of this technology provides greater customer satisfaction.

  • What is Hi-Speed USB 2.0?
    USB 2.0 offers high-speed 40X performance over fast speed USB 1.1 based systems. USB 2.0 is designed for supporting devices with high I/O requirements such as scanners, storage, cameras, and LAN devices. USB 2.0 is backwards compatible with USB 1.1 so that you can continue to use devices, such as USB keyboards and mice, which do not require the high bandwidth that USB 2.0 offers. When purchasing USB 2.0 devices look for the High Speed USB logo. This ensures that the device meets the USB 2.0 specifications.


  • Does Intel qualify memory for use on Intel desktop boards?
    No. OEMs and system integrators are solely responsible for qualifying the memory they include in their systems. Intel performs only limited testing of selected memory modules to verify functionality of the desktop board's design. Intel offers a program in which an independent test lab tests system memory and reports passing results to Intel for inclusion on our Internet based tested memory list.

On-Board Audio:

  • What is AC’97 and what does it do?
    The AC’97 (Audio Codec 1997) specification defines a high-quality audio architecture that advances the migration to digital audio, while maintaining support for analog interconnects for backward compatibility.

  • Why is SoundMAX* Cadenza* superior to other integrated audio solutions?
    SoundMAX* Candenza* builds on SoundMAX* with SPX which delivers the digital sound quality and features that end users expect from digital communications networks and consumer audio equipment by adding capability for powerful voice input technologies to improve speech recognition. SPX (Sound Production eXtensions) technology and 3D positioning provide immersive gaming not available with any other integrated audio solution. SPX literally creates sounds in real-time as the user is playing the game, rather than playing the same MIDI or wave file over and over. The result is much more dynamic, responsive sound.


  • What is the Communications Network Riser (CNR)?
    The Desktop Board D845PECE optionally supports the CNR connector. The CNR connector is designed to support audio, modem, USB* and LAN interfaces of the Intel® 845PE chipset. The interfaces supported include AC'97, LAN and SMBus. Some versions of the Desktop Board D845PECE do not ship with a CNR connector.

Power Supply:

This applies to:

Intel® Desktop Board D845PECE

Solution ID: CS-020047
Last Modified: 30-Aug-2012
Date Created: 07-Dec-2004
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