OverDrive® Processor Sockets
Jumpers or Switches
Troubleshooting

OverDrive^® Processor Sockets

Depending on the type of OverDrive^® processor socket in your system, there may be some special steps you need to take when installing the Intel OverDrive processor. Here are some things you need to look for:

Handle or No Handle?
Two common types of OverDrive processor sockets are those with a handle (Zero Insertion Force socket) and those without a handle (Low Insertion Force socket).

If your system’s processor socket has a handle, removing and replacing processors is easy. Most Pentium^® processor-based systems have sockets with handles.

To open the socket, lift the handle to a 90° upright position, then remove or insert the processor. To close the socket, lower the socket handle.

If your system’s processor socket does not have a handle (see Figure 1), removing and replacing processors requires additional steps. Check your system manufacturer manual and the OverDrive processor installation manual for instructions.

If your Pentium processor-based system has a socket without a handle, Intel recommends you have the Pentium OverDrive processor upgrade installed by a dealer or qualified professional.

How many pinholes? (Intel486^™ processor-based systems only)
Sockets in Intel486^™ processor-based systems are different sizes. If your system has a socket with 17 pinholes per side (168- or 169-pinhole socket), you cannot upgrade with the Pentium OverDrive processor for Intel486 processor-based systems. For this upgrade, the OverDrive socket must have 19 pinholes per side (237- or 238-pinhole socket). An easy way to tell if you can install a Pentium OverDrive processor in your system is to look at the original Intel486 processor. If the processor is installed in the upgrade socket and there is an extra row of pinholes around the processor, you have a 237- or 238-pinhole socket.

Is there a special socket just for the OverDrive processor? (Intel486 upgrades only)
Some Intel486 processor-based systems have a special socket for the OverDrive processor upgrade. To do the upgrade, you need to install the OverDrive processor in the empty socket.

In some cases, the original processor is soldered to the motherboard and you install the OverDrive processor in a nearby empty upgrade socket.

However, if the original processor is soldered to the motherboard and there is no upgrade socket, your system is not upgradable. Do not attempt to remove the original processor.

Jumpers or Switches

Depending on your system, there may be some special steps you need to take to configure your motherboard when installing the Intel OverDrive processor.

• No jumper configuration is necessary if you are upgrading a 60- or 66-MHz Pentium processor, and jumper configuration is rarely needed if you upgrade a 75-, 90- or 100-MHz Pentium processor.
  Check your computer manufacturer’s manual for details about your specific system.
  In most cases, if you have correctly oriented the OverDrive processor, starting your computer does not damage the processor even if jumper or switch changes are required--the system simply does not function correctly.

What are jumpers?
Jumpers are very small multiple pins fastened to the motherboard in various locations, depending on your system’s particular layout. If you look closely, you can see that each jumper is labeled with a number or letter that typically is printed on the motherboard.

The pins are connected (ON) when a tiny plastic connector covers two pins. The connector has a metal piece embedded in the plastic that allows current to pass between the pins. (See Figure 2.)

To turn the connection OFF, remove the jumper connector from the pins. You can also place the connector over only one of the pins for safekeeping. (See Figure 3.)

To turn the connection ON, place the connector over the two indicated pins. While some jumpers appear in pairs; others may appear in sets of four or more.

What are switches?
Switches are small devices fastened to a system motherboard that allow you to specify a configuration based on the processor you intend to use. To set, you move the “pointer” to the correct specification. For example, a switch may list processor speeds, voltage, or OverDrive processor names. Depending on the specifications of the OverDrive processor, you select the appropriate setting.

Check with your computer owner’s manual for more details about your system.

Troubleshooting

The majority of Intel OverDrive processor installations are simple and straightforward. However, if you experience difficulty, review the following checklist:

• Ensure that:
  
  • The power cord is plugged into the wall outlet.
    The cables and cords are attached correctly.
    Any boards or cards you removed are reinstalled properly.
    The Intel OverDrive processor is aligned and installed in the socket correctly.
    

  Did you set the jumpers or system switches correctly, as described in your computer owner's manual?
  Your computer may need an updated control program (BIOS). Contact the technical support department at your computer vendor or dealer for BIOS information.
  If your Intel OverDrive processor passes all the diagnostic tests, but you still don't see a speed improvement, it is best to check with your computer manufacturer. The System Upgrade Guide offers a link as well as contact phone number and address to most manufacturers.

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