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I assume that the old G5 mac was pretty bad at 64bit-stuff compared to its 32bit calculations. Since all scores are normalized to the performance of that computer ( = 1000 IIRC), this will mean that the newer architectures that are more 64bit focused will fare relatively better towards that benchmark then the 32bit one.
 
hey its my thread ;)

ive gone up from 10,000 to roughly 12,500 due to upgrading my processors :)
 
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