IBM Netfinity 4500R Type 8656 Hardware Maintenance Manual page 64

3.
Attention: To avoid damage and ensure proper server operation when you install a
new or an additional microprocessor, use microprocessors that have the same cache
size and type, and the same clock speed. Microprocessor internal and external clock
frequencies must be identical.
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Hardware Maintenance Manual: Netfinity 4500R Type 8656
When the second processor (microprocessor 2) is installed it becomes the BOOT
processor and the original processor (microprocessor 1) becomes the application
processor.
1
Air baffle
1
Terminator card
2
Microprocessor 2
3
VRM
4
Microprocessor 1
5
VRM connector