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.
SPEC_int base 2000
SPEC_fp base 2000
Xeon DP with 1MB L3 cache
Athlon MP 2600+
Itanium with 6MB L3 cache
Alpha 21264 (16MB ext. L2)
SUN UltraSPARC III
IBM Power4 +
* 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.