USB has more control commands and other overhead commands other than the actual data, so even though it is rated at 480 Mbit/sec, it still is 25 to 50% slower than Firewire 400. The tests I saw (don't remember when) showed a significant improvement of FW400 over USB2.0.

My assumption is that the overhead is due to USB being able to support 128 devices, I am not sure what FW can do.

Not an official term, just what I call it as compared to FW.

<>< <>< <>< <>< <>< <><
73's
Tom N�DIH

On Jan 30, 2005, at 2:38 AM, Kyle Hansen wrote:

FW400 (400Mbps) and USB 2.0 (480Mbps) are the same in real world speed/throughput tests. And what do you mean when you say "excessive overhead?" I have never heard that term in the computing world.

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