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7 Observe the post-installation instructions described on page 36. 3 System upgrade Upgrading the processor This section explains the procedures for removing and installing the processor and heat sink fan (HSF) assembly. Processor configuration guidelines The mainboard has two Socket F (1207-pin) processor sockets supporting Dual-Core or Quad-Core AMD Opteron™ processors. You have the option to upgrade the default processor or install a second one for a dual-processor configuration. Observe the following guidelines when replacing or installing a processor. • The CPU 1 socket must always be populated. If no processor is installed in this socket, the system will fail to boot. • Before removing a processor, make sure to back up all important system files. • When installing a second processor, make sure it has same stepping and frequency specifications as the default processor. • Handle the processor and the HSF assembly carefully. Damage to either may prevent the system from functioning properly. To upgrade the default processor: 1 Perform the pre-installation instructions described on page 35. 2 Lay the server on its side (components showing). 49 3 Remove the HSF assembly. Important: Before removing a CPU from the mainboard, make sure to create a backup file of all important data. (1) Observe the ESD precautions and pre-installation instructions described on page 35. Warning! The heat sink becomes very hot when the system is on. NEVER touch the heat sink with any metal or with your hands. (2) Disconnect the CPU fan cable from its mainboard connector. (3) Disengage the retaining clip from the heat sink base (1). (4) Release the clips from the tab on the heat sink base (2). (5) Pull the HSF assembly away from the CPU (3). (6) Lay down the HSF in an upright position—with the thermal patch facing upward. Do not let the thermal patch touch the work surface. (7) Use an alcohol pad to wipe off the thermal grease from both the HSF assembly and the processor socket retention plate. 4 Remove the default processor. Warning! The processor becomes very hot when the system is on. Allow it to cool off first before handling. (1) Release then lift up the load lever. (2) Open the retention plate to expose the socket body. 50 3 System upgrade (3) Grasp the processor by its edges and lift it out of its socket. (4) Store the old processor inside an anti-static bag. (5) Remove the new processor from its protective packaging. 5 Install the new processor. (1) Hold the processor by its edges, then insert it in the socket. Make sure that the alignment tabs on the socket fit the two notch located on the edge of the processor. The pins are keyed in such a way that you cannot install the processor in the wrong orientation without bending the pins. (2) Close the retention plate. (3) Engage the load lever back into place. 6 Apply the thermal interface material. (1) Use an alcohol pad to wipe off the old thermal grease from both the HSF assembly and the processor socket retention plate. (2) Apply a thin layer of an Acer-approved thermal interface material before installing the HSF. Make sure that only a very thin layer is applied so that both contact surfaces are still visible. 51 7 Reinstall the HSF assembly. (1) Apply thermal grease. Apply approximately 0.1ml of the thermal grease compound to the top of the CPU. (2) Install the HSF assembly (1) Move the handle of the retaining clip slightly in a direction away from the heat sink. (2) Align the heat sink fan assembly to the heat sink base (1). Note: Make sure to install both sides of the retaining clips. (3) Secure the retaining clip to the tabs in the heat sink base by aligning the clip holes over the tabs (2). (4) Secure the retaining clip back toward the heat sink base (3). (3) Connect the CPU fan cable to its mainboard connector. Refer to “Mainboard layout” on page 14 for the location of the CPU fan connector. 8 Observe the post-installation instructions described on page 36. To install a second processor: (1) Prepare the processor socket 2 for installation. (2) Install the new processor. Refer to steps 6 to 9 of the previous section. 3 System upgrade Upgrading the system memory This section includes instructions for removing and installing a DIMM (dual in-line memory module). Altos G5450 has sixteen DIMM slots. Each CPU controls eight DIMM slots. The DIMM slots support dual channel DDR2 -667 registered ECC memory modules. Important: When you are using a single-processor server, you should install a pair of identical modules into the DIMM A1 and B1, DIMM A2 and B2, DIMM A3 and B3, DIMM A4 and B4 slots. The DIMM C1 to DIMM D4 slots are enabled when a second CPU is installed on the mainboard. For instructions on how to install an additional CPU, see “To install a second processor:” on page 51. When you are using a dual-processor server, you should employ a paired DIMM configuration by installing modules in the DIMM A,B and DIMM C,D slots. 53 DIMM population guidelines Important: For the ...