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Full Discussion: Differences in IBM p server
Operating Systems AIX Differences in IBM p server Post 302772135 by MichaelFelt on Saturday 23rd of February 2013 11:52:29 AM
Old 02-23-2013
A short answer is:
speed and energy consumption.
Also, POWER7 supports SMT4 while POWER5 and POWER6 only support SMT2 (processor super scaling).
There are major architecular differences, but they are binary compatible (p 5 -> p6 -> p7).
Applications compiled using shared libraries usually work over hardware and AIX levels, but with static libraries you may have issues when changing AIX levels.
 

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