Specifications

Chapter 2. Architecture and technical overview 37
Draft Document for Review May 12, 2014 12:46 pm 5102ch02.fm
Figure 2-10 Memory DIMM topology for the Power S822
In general, the best approach is to install memory evenly across all processors in the system.
Balancing memory across the installed processors allows memory access in a consistent
manner and typically results in the best possible performance for your configuration. Account
for any plans for future memory upgrades when you decide which memory feature size to use
at the time of the initial system order.
For systems with a single processor installed, the plugging order for memory DIMMS is as
follows:
򐂰 First CDIMM pair is identical and installed at C16 and C18.
򐂰 Next CDIMM pair is identical and installed at C21 and C23.
򐂰 Next CDIMM pair is identical and installed at C17 and C19.
򐂰 Next CDIMM pair is identical and installed at C20 and C22.
For systems with two processors installed, the plugging order for memory DIMMS is as
follows:
򐂰 First CDIMM pair is identical and installed at C16 and C18.
򐂰 Next CDIMM pair is identical and installed at C24 and C26.
򐂰 Next CDIMM pair is identical and installed at C21 and C23.
򐂰 Next CDIMM pair is identical and installed at C29 and C31.
򐂰 Next CDIMM pair is identical and installed at C17 and C19.