HP Server rp7420 Installation Guide, Fifth Edition - HP 9000 rp7420 Server - Page 20

Introduction Detailed HP 9000 rp7420 Server Description the board will not operate properly. There cannot be a terminator board in socket 1 or socket 3 locations. See Table 1-2 for the CPU load order that must be maintained when adding CPUs to the cell board. See Figure 1-8 for the locations on the cell board for installing CPUs. Table 1-2 Cell Board CPU Load Order Number of CPUs Installed Socket 0 Location Two CPU installed Four CPU installed Six CPU installed Eight CPU installed Socket 1 Location Empty slot Empty slot CPU or Empty CPU installed Socket 2 Location Terminator CPU installed CPU installed CPU installed Socket 3 Location Empty Empty Empty or CPU CPU installed Figure 1-8 CPU Locations on Cell Board CPU Socket 2 CPU CPU Socket 3 Cell Socket 1 Controller CPU Socket 0 DIMMs Custom designed by HP, each DIMM contains 36 x 4 SDRAM memory components similar to PC-133 memory, but qualified to run at 125 MHz. They have a low-voltage TTL interface. The CEC does not support traditional DRAMs. The HP 9000 rp7420 Server supports DIMMs with 256 MB, 512 MB 1 GB, and 2 GB capacity. Table 1-3 shows each DIMM supported with its associated capacity, the resulting total system capacity, and the memory component density. 20 Chapter 1