philo
Thu Apr 17 15:54:11 PDT 2008
"dave xnet" <davexnet02DEL@ETEyahoo.com> wrote in message
news:lsue04deqsba92murhbh8ntcp2gurrql4j@4ax.com...
> On Thu, 17 Apr 2008 01:09:41 -0500, "philo" <philo@privacy.net> wrote:
>
> >
> >"dave xnet" <davexnet02DEL@ETEyahoo.com> wrote in message
> >news:qvqc04leaq53b3dg1o8ke6f380p8f2qon7@4ax.com...
> >> Hello,
> >> I added a USB 2.0 PCI card to an older PC to accomodate
> >> a new Canon USB 2.0 inkjet printer.
> >>
> >> The card installed fine and is working, but here's the
> >> problem. All it takes is for the printer to be turned on,
> >> and the PC becomes very slugginsh.
> >>
> >> Running HDtach shows about 40mbps (on an Ultra66
> >> Promise controller) while it runs at 58mbps when the
> >> printer is turned off.
> >>
> >> Why would the USB device cripple the PC?
> >> I've been in the BIOS to see if there's anything, but
> >> for now all I did is disable the legacy (onboard) 1.1
> >> USB controller.
> >>
> >> Any thoughts appreciated.
> >
> >
> >USB can take some CPU resources...but it's usually not noticable...
> >When you say "older computer"...I imagine the CPU is a bit on the slow
side
> >
> You're right about that. It's a 1999 VIA MVP3 based board with
> AMD K6-3 cpu @ 550 MHz.
>
> Just having the USB 2.0 card installed slowed it down a little,
> but having the printer connected and turned on
> (just sitting idle) brings it to it's knees.
>
> For now, I've created a 2nd hardware profile with all USB disabled
> and using that, the computer is responsive again.
>
> I've looked in msinfo32, there are no "problem devices"
> some devices are usng the same IRQ, I'm ot suire if it's an
> issue or not. No errors are reported.
Though I have setup a number of win2k machines on amd-450/550 cpu's
and it ran fine...I have never used USB2 on one of them and probably won't
give it a try.
I have heard that "firewire" is not so CPU intensive...
but I have never managed to get it working right...so on my newer machines I
always use USB2