I'm scanning with an Epson 3170; my machine USB port is 1.1;  how much do I
really gain in speed by putting in a USB 2.0 card ?  worth it ?  if so, any
recommendations for a PCI card ?

"...
any recommendations for a PCI card ?
..."

Adaptec



"Liz" <liz@tiredofspam.com> wrote in message
news:kmE7d.1943140$ic1.198804@news.easynews.com...
> I'm scanning with an Epson 3170; my machine USB port is
1.1;  how much do I
> really gain in speed by putting in a USB 2.0 card ?  worth
it ?  if so, any
> recommendations for a PCI card ?
>
>
>
>

"RSD99" <rsdwla.NOSPAM@gte.net> wrote in message
news:xBF7d.930$1g5.303@trnddc07...
> "...
> any recommendations for a PCI card ?
> ..."
>
> Adaptec

ok ... but am I going to scan much faster if I throw this in the machine ??

>From: "Liz" liz@tiredofspam.com

>but am I going to scan much faster if I throw this in the machine ??

USB 2.0 is, in theory, 40x faster than USB 1.1 ... however, in real life wit
h
real devices the speed improvement is typically much less.  Just how much le
ss
depends on the actual speed of the devices.  As one example, I compared USB 
1.1
vs 2.0 compact flash memory card readers and the 2.0 reader was about 5x
faster.

Dunno about your scanner, many of them are pretty slow so the data is
transferred in the background while the next line is scanned.  So you may or
may not see a big improvement.  One way to check is to ask if anyone has thi
s
same scanner running on USB 2 and see if they're running a lot faster.

"Bill Hilton" <bhilton665@aol.comedy> wrote in message
news:20041002185359.12217.00001079@mb-m21.aol.com... 
> 
>
> USB 2.0 is, in theory, 40x faster than USB 1.1 ... however, in real life
with
> real devices the speed improvement is typically much less.  Just how much
less
> depends on the actual speed of the devices.  As one example, I compared
USB 1.1
> vs 2.0 compact flash memory card readers and the 2.0 reader was about 5x
> faster.
>
> Dunno about your scanner, many of them are pretty slow so the data is
> transferred in the background while the next line is scanned.  So you may
or
> may not see a big improvement.  One way to check is to ask if anyone has
this
> same scanner running on USB 2 and see if they're running a lot faster.

well, you're right, Bill ... but I figured I'd be lucky if I got a few
answers at all ... much less from a bunch of Epson Perfection 3170 Photo
scanner owners who had switched from 1.1 to 2.0 and done timings ;)

I don't know what the relative percentages of time spent scanning vs.
transferring might be ... and, though your point seems well taken about
"interlinear transfer," if the scanner has a limited buffer (and of course
it DOES have some limit) then I assume that the scan process will wait for
the buffer to be sent ... if not, where is your data going ??

in any case, thanks for responding !

"jjs" <jjs@nospam.com> wrote in message
news:10luj58jjpjd633@news.supernews.com...
> I may be wrong, but I think that scanner requires USB2. In any event, it
is
> unlikely that the scanner is sending data fast enough to challenge your
USB
> 1.1

no, it works fine with 1.1; my question is whether it's worth installing USB
2.0 on my host machine

On Sat, 02 Oct 2004 20:39:44 GMT, "Liz" <liz@tiredofspam.com> wrote:

>Epson 3170

If you use 2.0 you will have a very noticable increase.  I found when
I upgraded an epson usb 1.1 scanner to a usb 2.0 Canon the speed was
at least 75% faster.

Liz wrote:
> I'm scanning with an Epson 3170; my machine USB port is 1.1;  how much do 
I
> really gain in speed by putting in a USB 2.0 card ?  worth it ?  if so, an
y
> recommendations for a PCI card ?
>
>
>
>
You might check with Epson tech support on this device specific question.
They will certainly know.
I got some good/fast responses from them recently re: my printer.
Bob Williams

Liz wrote:
> I'm scanning with an Epson 3170; my machine USB port is 1.1;  how much do 
I
> really gain in speed by putting in a USB 2.0 card ?  worth it ?  if so, an
y
> recommendations for a PCI card ?
>
>
>
>

Dunno about the Epson, but my Canon 1250 is able to scan A4 @ 600 DPI in
26 seconds (24 bits) via USB 2. With USB 1.1 is took ages.

As stated in another reply: Adaptec is excellent, but brands like
Sitecom etc. will also do. They may be a little slower.

Waldo

Liz wrote:
> I'm scanning with an Epson 3170; my machine USB port is 1.1;  how
> much do I really gain in speed by putting in a USB 2.0 card ?  worth
> it ?  if so, any recommendations for a PCI card ?

If you're using Mac, then note that USB2 support was only added with OS
X.

Andrew