HP Integrity rx8620 Installation Guide, Sixth Edition - HP Integrity rx8620 Se - Page 17

PDH Riser Board, Central Processor Units

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Introduction Detailed HP Integrity rx8620 Server Description PDH Riser Board The HP Integrity rx8620 Server PDH riser board is a small card that plugs into the cell board at a right angle. The PDH riser interface contains a microprocessor memory interface microcircuit, hardware including the processor dependant code (PDC) flash memory, and a manageability microcontroller with associated circuitry. The PDH obtains cell board configuration information from cell board signals and from the cell board local power module (LPM). Central Processor Units The cell board can hold up to four CPU modules and can be populated with modules in increments of one after meeting the minimum of two CPUs installed on the cell board. On a cell board, the processors must be the same type and speed. See Table 1-1 for the CPU load order that must be maintained when adding CPUs to the cell board. Refer to Figure 1-7 for the locations on the cell board for installing CPUs. A single CPU configuration is not available for the cell board. Chapter 1 17

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Chapter 1
Introduction
Detailed HP Integrity rx8620 Server Description
17
PDH Riser Board
The HP Integrity rx8620 Server PDH riser board is a small card that plugs into the cell board at a right angle.
The PDH riser interface contains a microprocessor memory interface microcircuit, hardware including the
processor dependant code (PDC) flash memory, and a manageability microcontroller with associated circuitry.
The PDH obtains cell board configuration information from cell board signals and from the cell board local
power module (LPM).
Central Processor Units
The cell board can hold up to four CPU modules and can be populated with modules in increments of one after
meeting the minimum of two CPUs installed on the cell board. On a cell board, the processors must be the
same type and speed. See Table 1-1 for the CPU load order that must be maintained when adding CPUs to
the cell board. Refer to Figure 1-7 for the locations on the cell board for installing CPUs. A single CPU
configuration is not available for the cell board.