Your computer is designed for dual-processor operations. The heat sinks
(CPU_0 and CPU_1) are keyed to fit their specific connector.
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
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 "System Board
Components" or for the Dell Precision 650 computer, see "System
Board Components") or the system 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 components illustration (for the Dell Precision 450 computer, see
"System Board Components" or for
the Dell Precision 650 computer, see "System
Board 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
the processors voltage don't match or the VRM is not properly installed, the
diagnostic lights indicate an error..
If you are upgrading your microprocessor, keep your original
microprocessor heat sink and securing clips for future troubleshooting.
NOTICE: You must
position the microprocessor correctly in the socket to avoid permanent
damage to the microprocessor and the computer.
If the release lever is not extended to
the release position, move it to that position.
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.
Carefully set the microprocessor in the
socket and press it down lightly to seat it.
Rotate the release lever back toward the
system board until it snaps into place, securing the microprocessor.
1
microprocessor pin-1 indicator
2
release lever
3
microprocessor
4
microprocessor socket
5
socket pin-1 indicator
Remove the thermal grease protective cover
and place the heat sink in the base.
Place one end of the heat sink under the
tab on the retention module on the side opposite the lever. Lower the heat
sink onto the microprocessor so that the heat sink fits securely under the
tab on the other end of the retention module.
Replace the retention module clips.
If you installed a microprocessor
replacement kit from Dell, return the original heat sink assembly and
microprocessor to Dell in the same package in which your replacement kit was
sent.
If you are installing a second
microprocessor, install the VRM.
NOTICE: If you are
installing a microprocessor upgrade kit from Dell, discard the original
heat sink. If you are not installing a microprocessor upgrade kit
from Dell, reuse the original heat sink when you install your new
microprocessor.
Remove the microprocessor heat sink:
Remove the two retention module clips
by pressing the tabs together and lifting the retention module clips up.
Press the lever on the retention
module until the heat sink is released.
Gently lift the heat sink away from
the microprocessor.
1
retention module clips (2)
2
tabs (2 on each retention module clip)
3
heat sink
4
microprocessor socket
5
retention module
6
lever
Pull the release lever straight up until
the microprocessor is released.
NOTICE: Be careful
not to bend any of the pins when you remove the microprocessor from the
socket. Bending the pins can permanently damage the microprocessor.
1
release lever
2
microprocessor
3
socket
Remove the microprocessor from the socket.
If you are replacing the microprocessor, leave the release
lever extended in the release position so that the socket is ready for the new
microprocessor and go to "Installing the Microprocessor."
If you are removing a second microprocessor and not installing
another one, remove the VRM and then continue
with step 9.
