About Cpu/Memory Boards - Sun Microsystems Fire V890 Service Manual
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Also See for Fire V890:
- Owner's manual (227 pages) ,
- Rack mounting manual (106 pages) ,
- Diagnostic manual (104 pages)
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About CPU/Memory Boards
The system motherboard provides slots for up to four CPU/Memory boards. Each
CPU/Memory board incorporates two UltraSPARC IV chip multithreading (CMT)
processors, with 16 Mbytes of static random access memory (SRAM) Level 2 external
cache memory per processor, and slots for 16 memory modules. The external cache
memory cannot be upgraded.
Chip multithreading technology allows two threads per UltraSPARC IV processor.
With this dual-threaded architecture, each UltraSPARC IV processor consists of two
virtual processors with shared memory. A dynamic arbitration scheme enables each
thread to make optimal use of the available memory, resulting in higher
performance.
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Sun Fire V890 Server Service Manual • October 2005
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