Central Processor Units; Memory Subsystem; Cpu Locations On Cell Board; Cell Board Cpu Module Load Order - HP rp7440 Installation Manual

Central Processor Units

The cell board can hold up to four CPU modules. Each CPU module can contain up to two CPU
cores on a single socket. Modules are populated in increments of one. On a cell board, the
processor modules must be the same family, type, and clock frequencies. Mixing of different
processors on a cell board or partition is not supported. Refer to
must be maintained when adding processor modules to the cell board. Refer to
the locations on the cell board for installing processor modules.
NOTE: Unlike previous HP cell based systems, the HP Integrity rx7640 server cell board does
not require that a termination module be installed at the end of an unused FSB. System firmware
is allowed to disable an unused FSB in the CC. This enables both sockets of the unused bus to
remain unpopulated.
Table 1-1 Cell Board CPU Module Load Order
Number of
CPU Modules
Installed
1
2
3
4
Figure 1-8 CPU Locations on Cell Board

Memory Subsystem

Figure 1-9 shows a simplified view of the memory subsystem. It consists of two independent
access paths, each path having its own address bus, control bus, data bus, and DIMMs . Address
and control signals are fanned out through register ports to the synchronous dynamic random
access memory (SDRAM) on the DIMMs.
The memory subsystem comprises four independent quadrants. Each quadrant has its own
memory data bus connected from the cell controller to the two buffers for the memory quadrant.
Each quadrant also has two memory control buses; one for each buffer.
Socket 2 Socket 3
Empty slot Empty slot
CPU installed Empty slot
CPU installed Empty slot
CPU installed CPU installed
Table 1-1 for the load order that
Socket 1 Socket 0
Empty slot CPU installed
Empty slot CPU installed
CPU installed CPU installed
CPU installed CPU installed
Detailed Server Description
Figure 1-8 for
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