HP rp7440 Site Preparation Guide, Fourth Edition - HP Integrity rx7640 and HP - Page 21

Figure 1-9 Memory Subsystem DIMMs The memory DIMMs used by the server are custom designed by HP. Each DIMM contains DDR-II SDRAM memory that operates at 533 MT/s. Industry standard DIMM modules do not support the high availability and shared memory features of the server. Therefore, industry standard DIMM modules are not supported. The server supports DIMMs with densities of 1, 2, and 4 Gb. Table 1-2 (page 21) lists each supported DIMM size, the resulting total system capacity, and the memory component density. Each DIMM is connected to two buffer chips on the cell board. See Appendix C for more information on DIMM slot mapping and valid memory configurations. Table 1-2 Server DIMMs DIMM Size 1 Gb 2 Gb 4 Gb Total Capacity 32 Gb 64 Gb 128 Gb Memory Component Density 128 Mb 256 Mb 512 Mb Cells and nPartitions An nPartition comprises one or more cells working as a single system. Any I/O chassis that is attached to a cell belonging to an nPartition is also assigned to the nPartition. Each I/O chassis has PCI card slots, I/O cards, attached devices, and a core I/O card assigned to the I/O chassis. Detailed Server Description 21