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Chapter 3 Maintaining the Sun Fire V20z Server 3-37
3.5.14 CPUs and Heatsinks
Caution – In a two-CPU configuration of the Sun Fire V20z server, both CPUs must
be the same stepping version and the same speed. Before adding or replacing a CPU,
ensure that you have read the information in “No Mixing of CPU Stepping Versions”
on page 3-8.
The Sun Fire V20z server supports both one- and two-CPU configurations. The
following procedure describes how to replace a CPU.
3.5.14.1 One-CPU Configuration
For a Sun Fire V20z server, if you are changing from a two-CPU configuration to a
one-CPU configuration:
1. Install the single CPU in the CPU0 connector.
2. Remove CPU1.
3. Remove the CPU VRM for CPU1.
If the CPU VRM for CPU1 is installed with no CPU in the CPU1 connector, the
server will not boot.
4. Remove the memory DIMMS and the memory VRM for CPU1.
If CPU1 is not installed, CPU0 does not see the memory DIMMs in the slots for
CPU1.
3.5.14.2 Removing a Heatsink and CPU
1. Power off the server, including any attached peripherals, and disconnect the
server from the electrical outlet.
Refer to “Powering Off the Server and Removing the Cover” on page 3-2.
2. Unfasten the single securing screw and remove the center air baffle (see
FIGURE 3-30).