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Chapter 4: Installing Components
Processor VRM requirements
This server requires the installation of two different types of VRMs (Voltage Regulator
Modules). The number and types of VRMs required depends on the number of processors
installed. Before installing or removing processors, refer to the following guidelines:
Installing and removing VRMs
When a third processor is installed in your server (in CPU socket 3), two VRMs (one VRM
9.1 for the cache and one VRM 10.2LD for the processor core) also need to be installed
at the same time. Also, when a fourth processor is installed, an additional VRM 10.2LD
must be installed.
To install a processor cache VRM:
1 Follow the instructions in “Preventing static electricity discharge” on page 65.
2 Follow the instructions in “Opening the server case” on page 66.
3 Remove the processor air baffle by following the instructions in “Removing and
installing the processor air baffle” on page 67.
4 Pull the plastic tabs away from the sides of the VRM socket.
Number of
processors
installed
VRMs required
1 No VRM required
2 No VRM required
3 One 9.1 volt processor cache VRM required
One 10.2LD volt processor core VRM required
4 One 9.1 volt processor cache VRM required
Two 10.2LD volt processor core VRMs required
8510702.book Page 118 Thursday, July 7, 2005 11:21 AM