Voltage Regulator Modules (Vrms); Table 2-1 Vrm And Processor Power Sequence; Table 2-2 Processor And Vrm Population Sequencing - Silicon Graphics 1400 Server Family Maintenance And Upgrade Manual

Voltage Regulator Modules (VRMs)

Up to six voltage regulator modules provide power for processors. Every processor
requires 1.5 VRMs, so with four processors, you must use six VRMs. Table 2-1 shows this
relationship.
You must use a specific number and connector population sequence of VRMs for each
combination of processors and termination boards. Table 2-2 lists the required number
and location of VRMs for each potential processor. Figure 2-9 shows this information
graphically.
VRM and Processor Power Sequence
Table 2-1
VRM # VRM provides power for
1 Processor #1
2 Processor #1 and #2
3 Processor #2
4 Processor #3
5 Processor #3 and #4
6 Processor #4
Processor and VRM Population Sequencing
Table 2-2
If you have a processor in connector #
1
1 and 2
1, 2, and 3
1, 2, 3, and 4
Voltage Regulator Modules (VRMs)
Description
Processor core power only
L2 cache power only
Processor core power only
Processor core power only
L2 cache power only
Processor core power only
You must have a VRM in connector #
1 and 2
1, 2, and 3
1, 2, 3, 4 and 5
1, 2, 3, 4, 5, and 6
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