Thread: Is the USB 2.0 speed of 480Mbps per device, port or for the whole USB subsystem?
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Old May 24th, 2008, 10:41 AM
garysims garysims is offline
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ElDiabloConCaca,

Thanks for your quick reply... It would certainly be interesting to know how many USB chips my Mac Mini has.

I can see what you are getting at about the hard drive performance vs. interface speed but I thought modern 7200 RPM disks had transfer rates of between 40-70MB/sec not 20-30 as you mention. Couple this with the fact that I have heard that the practical speed of USB 2.0 is not 60MB/sec but more like 40MB/sec then it looks like 1 drive could saturate the USB chipset and 2 might drown it!!!

I wonder if there is a USB I/O or speed monitor for the Mac?

Thanks,

Gary
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