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Conclusion

This article contains brief reviews of different processors that you are likely to see in a modern server. I focused mostly on widespread and currently manufactured products and thus omitted the Pentium M and Crusoe, which are used in blade servers - they are not very popular. Of course, it’s impossible to cover everything in a single article – it is already very long.

Let’s not forget, too, that the performance of an end-system depends not only on the processor performance, but also on the system topology, the method of implementing the multiprocessor support and other nuances. That’s why you can see systems on the same processor, but from different manufacturers showing differing performance.

Well, that’s a topic for a next article. Now, I’d like to put all performance data into one table and show it to you. I also include data on x86 processors (Xeon, Athlon MP and Opteron), just for the sake of comparison. This table makes it easy to compare the existing server processors.

CPU

Frequency

SPEC_int base 2000

SPEC_fp base 2000

Xeon DP with 1MB L3 cache

3.2GHz

1274

1200

Athlon MP 2600+

2.13GHz

751

602

Opteron 148

2.2GHz

1405

1505

Itanium with 6MB L3 cache

1.5GHz

1322

2119

PA8700+*

875MHz

642

600

Alpha 21264 (16MB ext. L2)

1200MHz

845

1019

MIPS R14000**

600MHz

483

499

SUN UltraSPARC III

1200MHz

642

1074

IBM Power4 +

1700MHz

1077

1598

* I couldn’t find info about the PA8700+ working at 1GHz

** I couldn’t find the results of the 700MHz R16000, too; this processor is not present among the official results of the SPEC committee.

 
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