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Microprocessor:DellPrecision™WorkStation220SystemUser'sGuide

Adding a Second Microprocessor

Use the following procedure to add a second microprocessor.

NOTICE: The second processor must be of the same type and speed as the first processor.

1. Remove the computer cover according to the instructions in "Removing and Replacing the Computer Cover."

2. Rotate the power supply as described in "Rotating the Power Supply Away From the System Board."

3. Squeeze in on the two pairs of tabs on the airflow shroud and lift it away.

4. Remove the terminator card from the secondary single-edge connector (SEC) cartridge connector (labeled "PROC_1").

Pull the terminator card straight out to remove it from the connector.

Install the voltage regulator module (VRM) in its socket on the system board.

For the location of the VRM socket, see Figure 8 in "Inside Your Computer." Orient the VRM with its capacitors facing toward the side

of the chassis containing the power supply.

6. Insert the new SEC cartridge/heat sink assembly into the system board connector.

Press the SEC cartridge firmly into its connector until it is fully seated and the latches snap into place. You must use up to 25 pounds (lb) of

force to fully seat the SEC cartridge in its connector. If your upgrade kit includes two thumbscrews, install them to secure the heat sink to the

system board (see Figure 1).

7. Replace the airflow shroud.

8. Rotate the power supply back into position, making sure that the securing tab snaps into place.

9. Replace the computer cover, and reconnect your computer and peripherals to their power sources and turn them on.

As the system boots, it detects the presence of the new processor and automatically changes the system configuration information in the

System Setup program. If you installed a second microprocessor, the following message is displayed:

Second processor detected

10. Enter System Setup, and confirm that the top line in the system data area correctly identifies the installed processor(s).

See "Using System Setup."

11. While in System Setup, reset the chassis intrusion detector by selecting System Security and changing Chassis Intrusion to Enabled or

Adding a Second Microprocessor

Upgrading an Existing Microprocessor

NOTES: Dell recommends that only a technically knowledgeable person perform this procedure.

To use a second microprocessor, your system must be running an operating system that supports multiprocessing such as the

Microsoft®Windows NT®operating system or a UNIX®-based operating system.

CAUTION: The processor can get extremely hot during system operation. Be sure that the processor has had sufficient time

to cool before you touch it.

CAUTION: Before you remove the computer cover, see "Safety First—For You and Your Computer."

NOTE: Before disconnecting a peripheral from the system or removing a component from the system board, verify that the standby

power light-emitting diode (LED) on the system board has turned off. For the location of this LED, see Figure 8 in "Inside Your

Computer."

NOTE: After you remove and replace the cover, the chassis intrusion detector will cause the following message to be displayed at

the next system start-up:

ALERT! Cover was previously removed.

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Dell Precision 220 Bedienungsanleitung Seite 70