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Message: <blockquote data-quote="Amen-Moses" data-source="post: 345986" data-attributes="member: 114">Not a noticeable difference no.  4200 to 5400 is very noticeable whereas 5400 to 7200 isn't.  I reckon that the difference lies in the cache on the drives, the 5400 and 7200 drive both have similar cache sizes whereas the 4200 cache is a lot smaller.Given that the 7200 runs hotter is far more expensive and uses 30-40% more power than the 5400 and doesn't come in as large storage sizes  to me it's a no-brainer.Just to clarify, I have a MacBook with a 100G 7200 speed drive and a MacBook Pro with a 160G 5400 speed drive and recently upgraded an iBook from 4200 to 5400 (30G to 120G) so I've had the chance to compare them all.Amen-Moses</blockquote>