Installing The Microprocessor; Installation Guidelines - Dell Precision Workstation 450 User Manual

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Microprocessor
Dell Precision™ Workstations 450 and 650 User's Guide
Installation Guidelines
Installing the Microprocessor
Removing the Microprocessor

Installation Guidelines

Your computer is designed for dual-processor operations. The heat sinks (CPU_0 and CPU_1) are keyed to fit their specific connector.
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For single-processor operations, the processor must be installed in socket CPU_0. The VRM for the single processor is already installed and cannot be
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removed. Processor socket 1 and VRM connector 1 must be empty. To locate these components, see the system board components illustration (for the
Dell Precision 450 computer, see
board label inside your computer.
For dual-processor operations, both processor sockets and the VRM connector must be populated. To locate the VRM connector, see the system board
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components illustration (for the Dell Precision 450 computer, see
Components")or the system board label inside your computer.
For dual-processor operations, the two processors and the VRMs must be identical. If the processors do not match, you receive a system message. If
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the processors voltage don't match or the VRM is not properly installed, the
If you are upgrading your microprocessor, keep your original microprocessor heat sink and securing clips for future troubleshooting.
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Installing the Microprocessor

CAUTION: The processor can get very hot during normal operation. Ensure that the processor has had sufficient time to cool before you touch it.
CAUTION: Before you perform this procedure, follow the safety instructions in the System Information Guide.
1. Shut down the computer through the Start menu.
2. Ensure that your computer and attached devices are turned off. If your computer and attached devices did not automatically turn off when you shut
down your computer, turn them off now.
NOTICE: To disconnect a network cable, first unplug the cable from your computer and then unplug it from the network wall jack.
3. Disconnect any telephone or telecommunication lines from the computer.
4. Disconnect your computer and all attached devices from electrical outlets, and then press the power button to ground the system board.
5. If you have installed a padlock through the padlock ring on the back panel, remove the padlock.
CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before opening the cover.
NOTICE: Before touching anything inside your computer, ground yourself by touching an unpainted metal surface, such as the metal at the back of the
computer. While you work, periodically touch an unpainted metal surface to dissipate any static electricity that could harm internal components.
6. Open the computer cover.
7. Remove the microprocessor airflow shroud (for the Dell Precision 650 computer, see
computer, see "Microprocessor Airflow
If you are replacing a microprocessor, see
NOTICE: You must position the microprocessor correctly in the socket to avoid permanent damage to the microprocessor and the computer.
8. If the release lever is not extended to the release position, move it to that position.
9. Align pin-1 (the imprinted corner) of the microprocessor and pin-1 of the socket.
NOTICE: Microprocessor pins are delicate. To avoid damage, ensure that the microprocessor aligns properly with the socket, and do not use excessive
force when you install the processor.
10. Carefully set the microprocessor in the socket and press it down lightly to seat it.
11. Rotate the release lever back toward the system board until it snaps into place, securing the microprocessor.
"System Board Components" or for the Dell Precision 650 computer, see
"System Board
Shroud").
"Removing the Microprocessor."
"System Board
Components" or for the Dell Precision 650 computer, see
diagnostic lights indicate an error..
"Microprocessor Airflow Shroud" or for the Dell Precision 450
Components") or the system
"System Board