HP Integrity rx4640 Operation And Maintenance Manual page 41

Ensure that all processors are rated for use at the same speed. Failure to observe this caution will result in
performance degradation.
NOTE
Additional CPUs come with a CPU installation wrench shown in Figure 4-11. Use the wrench to install CPUs.
Processor Load Order
Processor modules are attached to the processor extender board, which is located under the top cover in the top service bay
directly under the memory extender board. The processor extender board can hold between one and four processor modules.
CPU 0 and CPU 1 are located on the top of the processor extender board and CPU 2 and CPU 3 are located on the bottom.
Processor modules must be installed in a specific order. The processor installation order is shown in Table 3-1.
Table 4-1 Processor Load Order
Processor
Socket
Module
First CPU 0
Second CPU 1
Third CPU 2
Fourth CPU 3
Chapter 4
Installing Additional Components and Configuring
Installing Processors and Memory
41