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PCMCIA USB 2.0 Speed?
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Subject Author Date
PCMCIA USB 2.0 Speed? Tom McCune 11-06-2004
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Posted by Tom McCune on November 6, 2004, 1:19 pm
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 Since just about the time I got this laptop, I just don't use my desktop,
except for its USB 2.0 card (my laptop has USB 1.1). That change in my
desktop from USB 1.1 to 2.0, decreased DVD burning (USB external DVD drive)
from 90 minutes to 14 minutes. I see that I can get the D-Link 2 port USB
2.0 PCMCIA delivered for $39, but can I expect the same speed improvement
on my laptop with this?

If so, I could pass my desktop on to another family member.

--
Tom McCune
My PGP Page & FAQ: http://www.McCune.cc/PGP.htm


Posted by Martin Slaney on November 6, 2004, 2:07 pm
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 Tom McCune wrote:

> Since just about the time I got this laptop, I just don't use my desktop,
> except for its USB 2.0 card (my laptop has USB 1.1). That change in my
> desktop from USB 1.1 to 2.0, decreased DVD burning (USB external DVD drive)
> from 90 minutes to 14 minutes. I see that I can get the D-Link 2 port USB
> 2.0 PCMCIA delivered for $39, but can I expect the same speed improvement
> on my laptop with this?

Sure. The interface you'll be using (32-bit Cardbus) is very similar to
PCI (as in your desktop) - and the bandwidth is very similar.

But one thing you need to watch out for a bit is powering arrangements.
If you want to use any bus-powered devices _at all_ (and that includes
silly things like mice) - you have to get 5V DC _into_ the adapter.
Thats means a AC adapter (which is not helpful when you're on the move
running the laptop on battery) or a PS/2 or USB power-pass-thru cable
(which is fiddly, and may not supply enough for some devices like
external HD's.
But not a problem really if your laptop just lives indoors as a
space-saving measure.


Posted by Tom McCune on November 6, 2004, 2:56 pm
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wMRxHcRVnygg@pipex.net:

> Sure. The interface you'll be using (32-bit Cardbus) is very similar to
> PCI (as in your desktop) - and the bandwidth is very similar.
>
> But one thing you need to watch out for a bit is powering arrangements.
> If you want to use any bus-powered devices _at all_ (and that includes
> silly things like mice) - you have to get 5V DC _into_ the adapter.
> Thats means a AC adapter (which is not helpful when you're on the move
> running the laptop on battery) or a PS/2 or USB power-pass-thru cable
> (which is fiddly, and may not supply enough for some devices like
> external HD's.
> But not a problem really if your laptop just lives indoors as a
> space-saving measure.

Thank you very much for the helpful reply. The only USB devices I use that
do not have their own power supply are USB flash drives. Since one of them
has a capacity of 1GB and does support USB 2.0, that should show some good
improvement in speed also.

--
Tom McCune
My PGP Page & FAQ: http://www.McCune.cc/PGP.htm


Posted by Andrew on November 6, 2004, 4:14 pm
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: But one thing you need to watch out for a bit is powering arrangements.
: If you want to use any bus-powered devices _at all_ (and that includes
: silly things like mice) - you have to get 5V DC _into_ the adapter.

I have the D-link USB 2.0 PC Card adaptor, and it does not even have
the ability to be powered with an adaptor. However, thusfar this has
not been a problem for any device I have tried. I have used mice and CF
card readers (all powered from the USB port) without any problem as
well as self-powered devices like DVD burners and external hard
drives. I'm guessing the only problem would be devices that draw
significant power from the USB port.

Andrew
--
----> Portland, Oregon, USA <----
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Posted by Tom McCune on November 6, 2004, 6:36 pm
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usenetMYSHOES@bizaveMYSHOES.com (Andrew) wrote in

> I have the D-link USB 2.0 PC Card adaptor, and it does not even have
> the ability to be powered with an adaptor. However, thusfar this has
> not been a problem for any device I have tried. I have used mice and CF
> card readers (all powered from the USB port) without any problem as
> well as self-powered devices like DVD burners and external hard
> drives. I'm guessing the only problem would be devices that draw
> significant power from the USB port.

Thanks Andrew.

I just tested DVD ripping speed of my desktop and laptop internal DVD ROM
drives. Unfortunately, the laptop only has about 70% of the desktop's
ripping speed, so I need to think further on this. I'm not sure what is
the most important factor in the slower ripping: 5400rpm laptop hard drive
vs. 7200rpm desktop hard drive; the DVD ROMs themselves; or since a high
level of compression was used, whether the desktop P4 at 1.7ghz vs. the
laptop P4M at 2.0ghz. On one DVD, the laptop was 4 minutes slower, and 15
minutes slower on another.

--
Tom McCune
My PGP Page & FAQ: http://www.McCune.cc/PGP.htm


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