IBM 8676 - Eserver xSeries 335 Hardware Maintenance Manual And Troubleshooting Manual page 63

Microprocessor 2
VRM slot (J42)
Microprocessor 2
LED (CR27)
Microprocessor 2
socket (U121)
Microprocessor 1
LED (CR28)
Microprocessor 1
socket (U82)
v If one microprocessor is installed:
– The microprocessor is installed in microprocessor socket 1 (U82).
– The microprocessor supports both the startup and application processes.
v If you install a second microprocessor in the server:
– The server operates as a symmetric multiprocessing (SMP) server. With an
SMP, operating system application programs can distribute the processing
load between the microprocessors. This enhances performance for database
and point-of-sale applications, integrated manufacturing solutions, and other
applications.
– Microprocessor 1 is installed in microprocessor socket 1 (U82);
microprocessor 2 is installed in socket 2 (U121).
Notes:
1. Read the documentation that comes with the microprocessor to determine if you
need to update the basic input/output system (BIOS) code. The most current
level of BIOS code for the server is available through the World Wide Web at
http://www.ibm.com/pc/support/.
2. To use SMP, obtain an SMP-capable operating system (optional). For a list of
supported operating systems, go to http://www.ibm.com/pc/us/compat/ on the
World Wide Web.
Attention: To avoid damage and to ensure proper server operation, review the
following information before you install a microprocessor:
v Ensure that the microprocessors are the same type, have the same cache size,
and have the same clock speed.
v Ensure that the microprocessor internal and external clock frequencies are
identical.
v See the ServerProven list at http://www.ibm.com/pc/compat/ for a list of
microprocessors supported by the server.
A new microprocessor comes in a kit with a VRM and a heat sink.
Complete the following steps to install a microprocessor:
Chapter 4. Customer replaceable units
53