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True to a degree. I don't care if it has a POWER6 or gerbils in a Habitrail as long as it processes our workload.
Where it becomes a factor is running workloads that are not SMP aware/capable. JDE, for example. At that point, it becomes an issue of CPW/throughput per processor v. CPW per system/LPAR. Only a faster processor (with suitable RAM etc.) can increase throughput to a single-threaded job. Lots of slow processors help you run more parallel tasks but that 2 hour batch job still takes two hours so the user still complains about the slow system. A faster CPU - POWER6 - will drop that 2 hours by a significant percentage. That looks like a performance improvement to the users and they are thus happy with the money spent on the upgrade.
The aggregate throughput matters to IT for managing the overall workload, but the individual CPU throughput is what makes the users like the system.
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