Sun Microsystems Fire 880, Руководство пользователя

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64 Sun Fire 880 Server Owner’s Guide • August 2001
About Memory Modules
The Sun Fire 880 server uses 3.3-volt, high-capacity next generation dual inline
memory modules (DIMMs). The DIMMs are built with synchronous dynamic
random access memory (SDRAM) chips that operate at a 75-MHz clock frequency.
The system supports DIMMs with 128-, 256-, and 512-Mbyte capacities, with future
support for higher capacities as they become available.
Each CPU/Memory board contains slots for 16 DIMMs. Total system memory ranges
from a minimum of 1 Gbyte (one CPU/Memory board with eight 128-Mbyte
DIMMs) to a maximum of 32 Gbytes (four boards fully populated with 512-Mbyte
DIMMs).
Within each CPU/Memory board, the 16 DIMM slots are organized into groups of
four. The system reads from, or writes to, all four DIMMs in a group simultaneously.
DIMMs, therefore, must be added in sets of four. The figure below shows the DIMM
slots and DIMM groups on a Sun Fire 880 CPU/Memory board. Every fourth slot
belongs to the same DIMM group. The four groups are designated A0, A1, B0, and
B1.
B1
B0
A1
A0
B1
B0
A1 A0
B1
B0
A1
A0
B1
B0
A1
A0