Installing a microprocessor and heat sink

Use this information to install a microprocessor and heat sink.

Before you begin

Note: This procedure should be performed only by trained service technicians.

The architecture of the Intel E5-46xx CPU and DMI switching of microprocessor sockets 1 and 2 allow for the processors to be populated as shown in the following figures.

Table 1. Supported CPU installation combinations

Number of microprocessors	Microprocessors socket 1	Microprocessors socket 2	Microprocessors socket 3	Microprocessors socket 4
1	CPU0
2	CPU0	CPU1
4	CPU0	CPU1	CPU2	CPU3
Notes: CPU0 is the boot strap processor. If a bad processor in microprocessor socket 1 causes the processor installed in microprocessor socket 2 to become the boot strap processor and is subsequently replaced, the processor ordering reverts to the default CPU IDs for the new number of CPUs, because the FPGA would not hold the last CPU ID assignments and “add in” the replaced processor. Three-processor configurations are not supported. A microprocessor failure in a four-processor configuration will result in the system failing down to three functional microprocessor.

The supported microprocessor configurations are shown in the following illustrations.

Before you install a microprocessor and heat sink, complete the following steps:

1. Read Safety and Installation guidelines.
2. If the compute node is installed in an Flex System chassis, remove it (see Removing a compute node from a chassis for instructions).
3. Carefully lay the compute node on a flat, static-protective surface, orienting the compute node with the bezel pointing toward you.

About this task

The following notes describe the type of microprocessor that the compute node supports and other information that you must consider when you install a microprocessor:

• This component can be installed as an optional device or as a CRU. The installation procedure is the same for the optional device and the CRU.
• The optional microprocessors that IBM supports are limited by the capacity and capability of the compute node. Any microprocessors that you install must have the same specifications as the microprocessors that came with the compute node.
• A socket cover and heat-sink filler or a microprocessor and heat sink must always be installed on microprocessor sockets 1, 3, and 4. Microprocessor socket 2 will only have a socket cover when a microprocessor is not install. If the compute node has only one microprocessor, it must be installed in microprocessor socket 1.
• If you are installing a second microprocessor, make sure that the microprocessors are identical.
• Before you install a new microprocessor, download and install the most current level of UEFI code (see Updating firmware and device drivers).
• When you install a second microprocessor, you might have to install additional memory or redistribute memory across the DIMM connectors. See Installing a DIMM.
• The microprocessor installation tool might become worn after several uses. Make sure that the tool can hold the microprocessor securely if you are reusing an existing microprocessor installation tool. Do not return the tool with other parts that you are returning.
• If you are installing a second microprocessor, the microprocessor option kit comes with a microprocessor installation tool that you must use when you install a microprocessor. The microprocessor installation tool comes with the replacement microprocessor installed on it and a cover over the microprocessor.
• If you are replacing a defective microprocessor, the CRU kit comes with one installation tool with the replacement microprocessor installed on it and a cover over the microprocessor, and one empty installation tool without a cover.
• If you are replacing a defective microprocessor, you must obtain the following items for use during the replacement procedure (see Parts listing, Types 7917, 7167, 2590 and 2584):
  • Alcohol wipes
  • Thermal grease

Attention:

1. 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.
2. Do not touch the contacts in the microprocessor socket. Touching these contacts might result in permanent damage to the system board.

Note: Be sure to use the installation tool that comes with your microprocessor installation tool assembly. The tools are similar in function and design, however Tool A has one setting for installing one size of microprocessor, and supports the following families of microprocessors: E5-26xx, E5-46xx. Installation Tool B has two settings for installing two different sizes of microprocessors. The settings that are marked on Tool B are "L" for smaller low core microprocessors, and "H" for larger high core microprocessors. Installation Tool B supports the following families of microprocessors: E5-26xx, E5-46xx, E5-26xx v2, E5-46xx v2.

Microprocessor Installation Tools A and B are shown in the following illustration.

To install a microprocessor and heat sink, complete the following steps.

1. Remove the cover (see Removing the compute node cover).
2. If you are not installing a new microprocessor and a new heat sink, remove the thermal grease from the heat sink and microprocessor; then, apply new thermal grease before installation (see Thermal grease).
3. Remove the heat-sink filler, if one is present.
4. Open the microprocessor socket release levers and retainer.
   
   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.
5. 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.
      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. Remove the microprocessor protective cover if one is present.
      
   3. Align the installation tool with the microprocessor socket. The installation tool rests flush on the socket only if it is properly aligned.
      
   4. Install the microprocessor using the following instructions for your installation tool.
      • If using Installation Tool A, twist the handle on the microprocessor tool assembly counterclockwise to the open position to insert the microprocessor into the socket, and lift the installation tool out of the socket.
      • If using Installation Tool B, 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. The following illustration shows the tool handle in the open position.
        
      Attention:

      • Do not press the microprocessor into the socket.
      • Make sure that the microprocessor is aligned correctly in the socket before you try to close the microprocessor retainer.
      • Do not touch the thermal grease on the bottom of the heat sink or on top of the microprocessor. Touching the thermal grease will contaminate it.
6. Close the microprocessor socket release retainer and levers.
   
   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.
   4. If a socket cover is installed over the microprocessor retainer, it is released as you close the retainer. Remove the socket cover from the compute node and store it in a safe place.
      Attention:

      • If you are installing a new heat sink, do not set down the heat sink after you remove the plastic cover.
      • Do not touch the thermal material on the bottom of the heat sink. Touching the thermal material will contaminate it.
7. If you are installing a new heat sink, remove the plastic protective cover from the bottom of the heat sink. If you are reinstalling a heat sink that you previously removed from the compute node, make sure that the thermal material is still on the bottom of the heat sink and on the top of the microprocessor.
   1. Position the heat sink over the microprocessor. The heat sink is keyed to assist with proper alignment.
   2. Align and place the heat sink on top of the microprocessor in the retention bracket, thermal material side down.
   3. Press firmly on the heat sink.
   4. Align the screws on the heat sink with the holes on the heat-sink retention module.
   5. Press firmly on the captive screws and tighten them with a screwdriver, alternating among the screws until they are tight. If possible, each screw should be rotated two full rotations at a time. Repeat until the screws are tight. Do not overtighten the screws by using excessive force. If you are using a torque wrench, tighten the screws to 0.9 Newton-meters (Nm) to 1.13 Nm (8 inch-pounds to 10 inch-pounds).