Intel® 850 ATX System Board Technical Reference

Features

    This Socket 423 system board uses the Intel 850 chipset. The system board supports:

Direct RAMBUS® RDRAM RIMM system memory
Intel® Pentium® 4 processors at 1.4GHz and 1.5GHz
Ultra ATA 33/66/100 drives
400MHz Front Side Bus (FSB)
4x AGP

System board layout

    The following illustration shows the system board divided into two sections:

Section 1

    1. Fan connector
    2. Battery
    3. SCSI LED connector
    4. CNR expansion slot
    5. PCI expansion slots
    6. Intruder header
    7. AGP expansion slot
    8. PWR/SLP connector
    9. Front panel header
    10. USB/CNR jumper
    11. USB front panel header
    12. BIOS configuration jumper

Section 2

    1. Diskette cable connector
    2. Primary IDE cable connector
    3. Secondary IDE cable connector
    4. Memory expansion slots (Bank 1)
    5. Memory expansion slots (Bank 0)
    6. 12V power supply connector
    7. Power supply cable connector
    8. 1× 6 3.3V power connector
    9. Auxiliary fan connector
    10. Auxiliary fan connector
    11. Processor socket
    12. Processor fan connector
    13. Mouse connector
    14. Keyboard connector
    15. USB connectors
    16. Serial (COM) connector
    17. Parallel (LPT) printer connector

BIOS configuration jumper settings

    The BIOS configuration jumper lets you clear passwords or recover your BIOS if it becomes corrupted. For information about the location of this jumper, see Section 1.

    Setting
    Jumper placement
    		When used

    Normal

    For normal operation

    (1-2 position)

    Configure

    For clearing passwords

    (2-3 position)

    Recover

    For recovering the BIOS

    (no jumper)

USB configuration jumper settings

Setting
Jumper placement
When used

USB port
enabled

(default)

Enables the USB port in the AGP bus.

(2-3 and 5-6 position)

USB port
disabled

Disables the USB port in the AGP bus.

(1-2 and 4-5 position)

Preventing electrostatic discharge

    The components inside your computer are extremely sensitive to static electricity, also known as electrostatic discharge (ESD).

    Caution

    ESD can permanently damage electrostatic discharge sensitive components in the computer. Prevent ESD damage by following ESD guidelines every time you open the computer case.

      Before opening the computer case, follow these guidelines:

    Turn off the computer power.
    Wear a grounding wrist strap (available at most electronics stores) and attach it to a bare metal part of the computer.

      Warning

      To prevent risk of electric shock, do not insert any object into the vent holes of the power supply.

      Touch a bare metal surface on the back of the computer.
      Unplug the power and modem cables.

        Before working with computer components, follow these guidelines:

      Avoid static-causing surfaces such as carpeted floors, plastic, and packing foam.
      Remove components from their antistatic bags only when you are ready to use them. Do not lay components on the outside of antistatic bags because only the inside of the bags provide electrostatic protection.
      Always hold expansion cards by their edges or their metal mounting brackets. Avoid touching the edge connectors and components on the cards. Never slide expansion cards or components over any surface.

        Warning

        To avoid exposure to dangerous electrical voltages and moving parts, turn off your computer and unplug the power cord before opening the case.

        Upgrading memory

          The Intel 850 ATX system board uses Rambus Interface Memory Modules (RIMMs).

          When you upgrade the memory on your system board, you need to use a combination of Rambus Interface Memory Modules (RIMMs) and Continuity-RIMMs (C-RIMMs).

        RIMM

          RIMMs are your memory modules. A RIMM has a metal cover on one or both sides of the module.

        C-RIMM

          C-RIMMs are placeholders that let the memory modules work. A C-RIMM does not have a metal cover on either side of the module.

        To upgrade memory:

          1. Turn off the computer.

          2. Following all electrostatic discharge precautions, disconnect the power cord and all other cables.

          3. Open the case by following the instructions in the original manual supplied with your system.

          4. Find the memory module banks, or expansion slots, on your system board.

          5. If you are removing a RIMM module from the memory module bank, gently pull the plastic tabs away from the sides of the memory module and remove it.
            - OR -
            If you are removing a C-RIMM module from the memory module bank, gently pull the plastic tabs away from the sides of the memory module and remove it.
          1. RIMMs must always be installed in pairs.
            If you are installing two memory modules into one bank (RIMM BANK 0), install two RIMMs in RIMM BANK 0 and two C-RIMMS in RIMM BANK 1 on the system board.
            - OR -
            If you are installing four memory modules into two banks (RIMM BANK 0 and RIMM BANK 1), install two RIMMs in RIMM BANK 0 and two RIMMs in RIMM BANK 1 on the system board.
            Make sure that you align the notches on the RIMM and C-RIMM with the notches on the memory module bank and press firmly into the bank.

          1. Make sure that the tabs on the sides of the RIMM and C-RIMM secure the memory module in the slot. When the module is secure, you will hear a click as both tabs lock.

          2. Close the computer case.

          3. Reconnect the power cables.

          4. Turn on the computer. Windows starts and the desktop screen appears.

          5. Right-click the My Computer icon, then select Properties. The amount of memory in your computer is shown at the bottom of the screen in the General tab.

        Specifications

          The following specifications are for the standard configuration. Your system may contain optional equipment. All specifications are subject to change without notice or obligation.

          Supported processors

          Intel ® Pentium ®  4 processors at 1.4 GHz and 1.5 GHz

          Chip set

          Intel 850

          Memory

          168-pin Direct Rambus Interface Memory Module (RIMM). Two banks. Four slots. Expandable to 2 GB (with 128Nb technology).

          BIOS

          AMI BIOS. Flash BIOS for easy updates from diskette.

          Hard drive interface

          Supports four IDE devices using two on-board PCI IDE connectors with PIO, Bus Master, and Ultra DMA33/66/100 operation modes. Automatic drive type selection for easy setup.

          Diskette drive interface

          A diskette drive controller is integrated on the system board. Support is available for a single diskette drive.

          Universal Serial Bus (USB)

          4 ports (2 rear, 2 front)

          Mouse

          PS/2 mouse connector

          Keyboard

          PS/2 keyboard connector

          Input/Output connectors

          One parallel (LPT) port and one serial (COM) port. Settings are configurable from the system setup program. No jumper changes required.

          Battery

          2032-style

          AGP expansion slot

          1

          PCI expansion slots

          5

          CNR expansion slot

          1 (shared with 5th PCI expansion slot)

          Environment

          Internal temperature: 0°C to +55°C

          Humidity: 20% to 80%

          Altitude: -60.96 m to 3048 m

          Shock: half-sine 2 ms

          Vibration: 10 Hz to 40 Hz,
          0.015 g 2  Hz (flat)
          2 Hz to 200 Hz, 0.25 g sinusoidal

          CPU clearance: >10.16 mm after installation, top and sides

          Many products for Gateway and its subsidiaries are custom engineered by our suppliers to Gateway specifications and may vary from similarly marketed products.