USB2.0 - any use for consumer devices

  • Thread starter Thread starter Martin Trautmann
  • Start date Start date
... and it is much slower on a USB 1.1 port than on USB2?
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The 3200 Epson is VERY much slower. Though they're not 'scanners' both HD's
(external USB's) are crawling on 1.1.

FWIW - I can burn a DVD from the 2.0 HD to the USB DVD (external) at 8X.
 
Did you miss the "USB 2.0 Epson 3200 Scanner" referenced above?
Click to expand...

I didn't. But it was not clear to me that you expected any speed gain
for the scanner, too. The main winner should be the external drive.

However, now that you mention it: Do you observe a significant speed
gain for your mouse? How did you notice? Scrolling now is 40 times
faster? ;-)
 
Martin said:
4 ms/line - this would be 26.4 s for a full page of 11" @ 600 dpi.
Is
it really that fast?
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Your comment made me take another look at the manual and it indicated
that the black and white speed would be the same as the color. Since
this seemed unlikely I timed it and the figure turned out to be about
correct for black and white but the machine took 4 times as long for
color, which is what I would expect, I think.
 
I didn't. But it was not clear to me that you expected any speed gain
for the scanner, too. The main winner should be the external drive.

However, now that you mention it: Do you observe a significant speed
gain for your mouse? How did you notice? Scrolling now is 40 times
faster? ;-)
Click to expand...
Sorry, can't say oin that as the computers that have USB 1.1 use a separate
plug in mouse (PS2). I've not seen a crying need to compare mice ... <G>

I -was- using the Epson on USB 1.1 until I got the native 2.0 ports on the
laptop - THAT was a big speedup. Scan, pause, scan, pause scan - done on
1.1, scan - done! on 2.0. Even 4x5 negatives scan without a pause - those at
1600 dpi. 35mm negs at 3200 dpi litterally 'zip'.

Neither USB 1.1 have firewire, so haven't hooked in that mode other than a
test on the laptop. About the same, though a stopwatch might show a second
or two on a 300 dpi full page.
 
Your comment made me take another look at the manual and it indicated
that the black and white speed would be the same as the color. Since
this seemed unlikely I timed it and the figure turned out to be about
correct for black and white but the machine took 4 times as long for
color, which is what I would expect, I think.
Click to expand...

Ah, thanks. According do 8 or 16 bits grey this would reduce the
transfer rate by factor 6 or 3 - not very impressive and closer to the
USB1.1 limit now.
 
It also takes USB 2.0 to make video capture devices useful w/o dropping
frames. I also can't imagine an external USB hard disk drive with only
a USB 1.0 cable connection.

Mike
 
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