Replacing microprocessor and heat sink

The following notes describe the type of microprocessor that the server supports and other information that you must consider when you install a microprocessor and heat sink.

Microprocessors are to be installed only by trained technicians.
Important
Always use the microprocessor installation tool to install a microprocessor. Failing to use the microprocessor installation tool may damage the microprocessor sockets on the system board. Any damage to the microprocessor sockets may require replacing the system board.
Be extremely careful, the microprocessor socket contacts are very fragile. Do not touch the microprocessor socket contacts. Contaminants on the microprocessor contacts or microprocessor socket contacts, such as oil from your skin, can cause connection failures between the contacts and the socket.
Do not mix the heat sink for microprocessor 1 and microprocessor 2 to avoid the thermal issue.
Do not allow the thermal grease on the microprocessor and heat sink to come in contact with anything. Contact with any surface can contaminate the thermal grease and the microprocessor socket.
Do not use any tools or sharp objects to lift the locking levers on the microprocessor socket. Doing so might result in permanent damage to the system board.
Each microprocessor socket must always contain either a socket cover or a microprocessor and heat sink.
Be sure to use only the installation tools provided with the new microprocessor to remove or install the microprocessor. Do not use any other tool.
When installing multiple microprocessors, open one microprocessor socket at a time to avoid damaging other microprocessor socket contacts.
The server supports up to two multi-core microprocessors. See the Lenovo ServerProven website for a list of supported microprocessors.
The first microprocessor must always be installed in microprocessor socket 1 on the system board.
When one microprocessor is installed, the air baffle must be installed to provide proper system cooling.
Do not remove the first microprocessor from the system board when you install the second microprocessor.
Do not mix microprocessors with different cores in the same server.
To ensure proper server operation when you install an additional microprocessor, use microprocessors that have the same QuickPath Interconnect (QPI) link speed, integrated memory controller frequency, core frequency, power segment, internal cache size, and type.
Mixing microprocessors of different stepping levels within the same server model is supported.
When mixing microprocessors with different stepping levels within the same server model, you do not have to install the microprocessor with lowest stepping level and features in microprocessor socket 1.
Both microprocessor voltage regulator modules are integrated on the system board.
Read the documentation that comes with the microprocessor to determine whether you have to update the server firmware. To download the latest level of server firmware and other code updates for your server, go to the Lenovo Support Portal.
The microprocessor speeds are automatically set for this server; therefore, you do not have to set any microprocessor frequency-selection jumpers or switches.
If the thermal-grease protective cover (for example, a plastic cap or tape liner) is removed from the heat sink, do not touch the thermal grease on the bottom of the heat sink or set down the heat sink. For more information about applying or working with thermal grease, see Thermal grease.
Note
Removing the heat sink from the microprocessor destroys the even distribution of the thermal grease and requires replacing the thermal grease.
To order an additional optional microprocessor, contact your Lenovo sales representative or Lenovo reseller.
The microprocessor installation tool has the microprocessor installed on the tool, and may have a protective cover over the microprocessor. Do not use the tool, or remove the cover until you are instructed to do so.
Note
Be sure to use the installation tool that comes with your microprocessor installation tool assembly. The tool has two settings for installing two different sizes of microprocessors. The settings that are marked on the tool are L for smaller low core microprocessors, and H for larger high core microprocessors.
Figure 1. Microprocessor installation tool

To replace a microprocessor and heat sink, complete the following steps:

Read the safety information that begins on Safety and Installation guidelines.
Turn off the server and peripheral devices and disconnect all external cables.
Attention
When you handle static-sensitive devices, take precautions to avoid damage from static electricity. For details about handling these devices, see Handling static-sensitive devices.
Remove the compute node (see Removing a compute node from a chassis).
Remove the air baffle (see Removing the air baffle).
Open the microprocessor socket release levers and retainer:
Figure 2. Microprocessor socket levers and retainer disengagement
1. Identify which release lever is labeled as the first release lever to open and open it.
2. Open the second release lever on the microprocessor socket.
3. Open the microprocessor retainer.
  Attention
  Do not touch the connectors on the microprocessor and the microprocessor socket.
Install the microprocessor in the microprocessor socket:
1. Open the packaging that contains the new microprocessor installation tool assembly and carefully remove the installation tool assembly from the package. The microprocessor is preinstalled on the installation tool.
  Note
  Do not touch the microprocessor contacts. Contaminants on the microprocessor contacts, such as oil from your skin, can cause connection failures between the contacts and the socket.
2. Align the installation tool with the microprocessor socket. The installation tool rests flush on the socket only if properly aligned.
  Figure 3. Installation tool alignment
3. Install the microprocessor using the following instructions for your installation tool.
  - When using the installation tool, twist the handle of the installation tool assembly counterclockwise until the microprocessor is inserted into the socket, and lift the installation tool out of the socket.
    Figure 4. Installation tool handle adjustment
    
    Figure 5. Installation Tool
  Attention
  Do not press the microprocessor into the socket.
  Make sure that the microprocessor is oriented and aligned correctly in the socket before you try to close the microprocessor retainer.
  Do not touch the thermal material on the bottom of the heat sink or on top of the microprocessor. Touching the thermal material will contaminate it.
Remove the microprocessor cover, tape, or label from the surface of the microprocessor socket, if one is present. Store the cover in a safe place.
Figure 6. Socket cover removal

Attention
When you handle static-sensitive devices, take precautions to avoid damage from static electricity. For details about handling these devices, see Handling static-sensitive devices.
Close the microprocessor socket release levers and retainer:
Figure 7. Microprocessor socket levers and retainer engagement
1. Close the microprocessor retainer on the microprocessor socket.
2. Identify which release lever is labeled as the first release lever to close and close it.
3. Close the second release lever on the microprocessor socket.
Install the heat sink.
Attention
- Do not mix the heat sink for microprocessor 1 and microprocessor 2 to avoid the thermal issue.
- Do not set down the heat sink after you remove the plastic cover.
- Do not touch the thermal grease on the bottom of the heat sink after you remove the plastic cover. Touching the thermal grease will contaminate it. See Thermal grease for more information.
  Figure 8. Thermal grease
1. Remove the plastic protective cover from the bottom of the heat sink.
2. Position the heat sink over the microprocessor. The heat sink is keyed to assist with proper alignment.
  Figure 9. Internal connectors on the system board
  
  Figure 10. Heat sink installation
3. Align and place the heat sink on top of the microprocessor in the retention bracket, thermal material side down.
4. Press firmly on the heat sink.
5. Press down on the center of the heat sink; then, press firmly on the captive screws and tighten them, alternating between the screws in a figure-8 pattern as illustrated on the heat sink label until they are tightened. You can cause damage to the microprocessor if you tighten the screws on one side first, rather than rotating. Rotate each screw one full rotation at a time. Repeat this process until the screws are tightened.
Reinstall the air baffle (see Installing the air baffle).
Reinstall compute node (see Installing a compute node in a chassis).
Slide the server into the rack.
Reconnect any cable that you removed.
Turn on the peripheral devices and the server.

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