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As I understand things, the POWER5, like the POWER4, is a dual-core 
processor.  Meaning, each chip module actually has 2 CPU's on it.  If that 
is the case, then why are most of the 520's labelled as single processor 
systems?  Are they really single module, but 2 CPU systems or does IBM do 
it's "governor" BS to actually only use one of the CPU's?

Also, POWER5 implements Simultaneous Multi-Threading (SMT) which means 
each CPU should look like 2 CPU's to the operating system, just as my 
dual-Xeon xSeries servers look like 4 processors to Windows because of 
Intel's HyperThreading technology.

So, given all of that, shouldn't a single processor POWER5 really look 
like a 4-way system to OS/400, given that the single chip module should 
have 2 processors, and each processor should look like 2 processors 
because of the SMT?

Thanks

Mark


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