Hi Mark Did you compare it when the *ist was the *only" USB device connected on the same controller? If you had for example a mouse or a keyboard on the same USB 1.1 controller or the controller shares the same interrupt with another device (that's normal on non APIC systems), this could have caused the slowdown. Also USB drivers and the operating system could have an influence too.
I think the bandwidth of both USB connection specs should leave enough reserve, it really depends on the writing and reading speed of the media (CF-Cards etc.) Saw some tests of scanners, where USB 1.1 or USB 2.0 did not matter speed wise. Sometimes it is just marketing.... greetings Markus > > I dunno. But my ist-D downloads *much* faster into a USB 2.0 connection > than into USB 1.1.

