304 IBM eX5 Implementation Guidee. Push the battery back into the socket with your finger and clip it back into place.7.1.3 Verify that the server will complete POST before adding optionsWhen you have ordered options for your server that have not yet been installed, it is a goodidea to ensure that the server will complete POST properly before you start to add youroptions. Performing this task makes it easier to compartmentalize a potential problem with aninstalled option rather than having to look at the entire server to try to find a good startingpoint during problem determination.7.2 Processor considerationsThe x3690 X5 server supports up to two matched processors. The required match is inregard to the family of processors, the number of cores, the size of Level 2 cache, the core,and front side bus speeds.As a matter of standard manufacturing, the producing vendor might alter the method ofmanufacturing the processor, which will result in various stepping levels, but this process willnot affect the overall functionality of the processor in its ability to communicate with otherprocessors in the same server. Any operational differences in stepping levels are handled bythe microcode of the processor, the Integrated Management Module (IMM), and the UEFI.7.2.1 Minimum processors requiredThe minimum number of processors required for the server to boot into any operationalconfiguration is one. The processor must be installed in socket 1, as shown in Figure 7-4 onpage 305.Tip: To understand the information in this section, first read the information in 4.7,“Processor options” on page 130.