HP Server rp8420 HP 9000 rp8420 Server - User Service Guide, Fifth Edition - Page 23

Detailed HP 9000 rp8420 server Description, Cell Board, The Cell Controller is

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Detailed HP 9000 rp8420 server Description Figure 1-4 HP 9000 rp8420 server 16-Socket Block Diagram Cell Board The cell board contains the processors, main memory, and the CC ASIC that interfaces the processors and memory to the I/O. The cell board is shown in Figure 1-5. The Cell Controller is the heart of the cell board, providing a crossbar connection that allows communication with other cell boards in the system. It connects to the PDH and micro controller hardware. Each cell board holds up to 16 DIMMS. Between one to four cell boards can be installed in the server. A cell board can be selectively powered down for cell replacement without affecting cells in other configured partitions. Detailed HP 9000 rp8420 server Description 23

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Detailed HP 9000 rp8420 server Description
Figure 1-4 HP 9000 rp8420 server 16-Socket Block Diagram
Cell Board
The cell board contains the processors, main memory, and the CC ASIC that interfaces the
processors and memory to the I/O. The cell board is shown in
Figure 1-5
. The Cell Controller is
the heart of the cell board, providing a crossbar connection that allows communication with
other cell boards in the system. It connects to the PDH and micro controller hardware. Each cell
board holds up to 16 DIMMS. Between one to four cell boards can be installed in the server. A
cell board can be selectively powered down for cell replacement without affecting cells in other
configured partitions.
Detailed HP 9000 rp8420 server Description
23