Voltage Regulator Modules (VRMs)
007-4276-001
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5. Attach the heatsink to the processor with five 6-32 X 3/8 screws, and tighten to 8-10
inch-pounds.
Voltage Regulator Modules (VRMs)
Follow the instructions in this section to remove and install a VRM.
Up to seven VRMs provide power for processors. Table 3-1 shows the relationship
between VRMs and processors.
VRMs 1 through 4 are embedded in the baseboard. Additional VRMs plug into
connectors 2 though 4 on the baseboard. You must use a specific number and connector
population sequence of VRMs for each combination of processors and termination
boards. Table 3-2 lists the required number and location of VRMs for each potential
processor.
Table 3-1
VRM/Processor Power Sequencing
VRM #
VRM provides power for
Description
1 (Embedded)
Processor #1
Processor core power only
2 (Embedded)
Processor #1
GLT (FSB reference)
3 (Embedded)
Processor #1 and #2
L2 cache power only
4 (Embedded)
Processor #3 and #4
L2 cache power only
#2 Connector
Processor #2
Processor core power only
#3 Connector
Processor #3
Processor core power only
#4 Connector
Processor #4
Processor core power only
Table 3-2
Processor/VRM Population Sequencing
If you have a processor in connector
VRM in connector #
1
None. All required VRMs are embedded in the baseboard.
1 and 2
2
Summary of Contents for 1450
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