before you begin:
1 thoroughly review the documentation that comes with the microprocessor to determine the required bios update. the latest level of bios code for your computer is available through the world wide web. see “getting help and information from the world wide web” on page 93 for the world wide web addresses.
2 (optional) obtain an smp-capable operating system. for a list of supported supported operating systems and other options for your computer, go to http://www.ibm.com/pc/ on the world wide web; then, select your country and navigate to the list of options for your computer.
to ensure proper computer operation when you install an additional microprocessor, use microprocessors that have the same cache size and type, and the same clock speed. microprocessor internal and external clock frequencies must be identical. you can use the configuration/setup utility program in your computer to determine the specific type of microprocessor on your system board.
a microprocessor must always be installed in socket cpu1 of the system board.
1. to order additional microprocessor options, contact your ibm marketing representative or authorized reseller.
2. terminator cards are not required for empty microprocessor sockets. however, for airflow, an empty microprocessor socket must contain a microprocessor baffle.
3. the microprocessor speeds are automatically set for this computer; therefore, you do not need to set any microprocessor frequency-selection jumpers or switches.
4. if you need to replace a microprocessor, call for service.
5. for additional illustrations of the system-board components, see “system-board option connectors” on page 29.
configuring the operating system
the microsoft windows xp operating system that comes preinstalled on your computer automatically configures itself when an additional microprocessor is installed. other operating systems might need to be manually configured to support an additional microprocessor.
installing an additional microprocessor on windows nt:
if windows nt is preinstalled on the computer, follow these steps:
1. backup the hard disk.
2. run the multiprocessor upgrade option program, addcpu.exe before you install the second microprocessor. the multiprocessor upgrade option program is at http://www.ibm.com/pc/support on the world wide web. from the ibm support page, type addcpu in the search field and press enter. in addition, download and read the addcpu.pdf file for instructions about adding a second microprocessor.
3. continue with step 1 of “installing the additional microprocessor” on page 49.
installing a additional microprocessor on windows 2000:
if windows 2000 is preinstalled on the computer, follow these steps:
be sure to check the microsoft web page at http://www.microsoft.com for updates to these instructions. from the microsoft web page, type multiprocessor support in the search field and press enter.
1. backup the hard disk.
2. do the following:
a. from the desktop, click start → settings → control panel.
b. on the control panel window, double-click the system icon.
c. on the system properties window, select the hardware tab; then, click the device manager button.
d. on the device manager window, click on the plus sign (+) next to the computer node to expand the list; then, double-click on acpi uniprocessor pc.
e. on the advanced configuration and power interface (acpi) pc properties window, select the driver tab; then, click the update driver button.
f. on the update device driver wizard window, click next.
g. on the next window, click the display a known list of drivers for this device so that i can choose a specific driver radio button; then, click next.
h. on the next window, click the show all hardware of this device class radio button. under the models field, select acpi multiprocessor pc; then, click next.
i. if the configuration shown in the wizard is satisfactory, click next to save the configuration.
j. click finish to complete the process.
k. when prompted as to whether you want to restart your computer, select yes.
3. continue with step 1 of “installing the additional microprocessor” on page 49.
installing the additional microprocessor
complete the following steps to install an additional microprocessor.
1. review the safety information beginning on page vii, “installation guidelines” on page 27, and “handling static-sensitive devices” on page 28.
2. turn off the computer and all attached devices.
3. disconnect all power cords; then disconnect all external cables.
4. remove the side cover (see “removing the side cover” on page 31).
5. remove the support bracket (“removing and installing the support bracket” on page 33).
6. remove the air baffle by unhooking it from its retaining tabs and lifting it off the chassis.
7. locate the second microprocessor socket (connector cpu2) on the system board.
8. remove the microprocessor baffle from the second microprocessor socket.
9. if the second microprocessor socket is covered with protective film, peel and remove the film.
10. install the microprocessor:
a. touch the static-protective package containing the new microprocessor to any unpainted metal surface on the computer; then, remove the microprocessor from the package.
b. pull out and lift up on the microprocessor-release lever to unlock the microprocessor socket.
1) do not use excessive force when pressing the microprocessor into the socket.
2) make sure that the microprocessor is oriented and aligned correctly with pin number 1 in the socket before you try to close the microprocessor-release lever. the following illustration shows the alignment marks for both microprocessors and sockets.
c. center the microprocessor over the microprocessor socket. align the triangle on the corner of the microprocessor with the triangle on the corner of the socket and carefully press the microprocessor into the socket.
d. carefully close the microprocessor-release lever to secure the microprocessor in the socket.
do not set the heat sink down after you remove the plastic cover and do not touch the thermal grease on the bottom of the heat sink. touching the thermal grease will contaminate it. if the thermal grease on the microprocessor or heat sink becomes contaminated, contact your service technician.
11. install the heat sink on the microprocessor:
a. remove the plastic cover from the bottom of the heat sink.
b. align and place the heat sink on top of the microprocessor, grease side down, in the retention bracket. press firmly on the heat sink.
alternate the tightening of the two captive screws to prevent damage to the microprocessor. ensure that the screws are completely tightened (until they stop); otherwise, damage to the microprocessor will occur.
c. secure the heat sink to the microprocessor by tightening the captive screws. alternate between the two captive screws in the heat sink while tightening them.
12. install the air baffle.
13. if you have other options to install or remove, do so now.
14. replace the support bracket (see “removing and installing the support bracket” on page 33).
15. replace the side cover (see “replacing the side cover” on page 53).
16. reconnect the external cables and power cords. turn on the attached devices, and turn on the computer.