Dennis,
We have a C600 with the Sonnet Crescendo L2 G3 upgrade and the Sonnet
Tango Firewire/USB card installed. We have not experienced any
stuttering problems. Our USB extensions are active, as we currently
have both a film scanner and a compact flash/smart media card reader
attached to the C600. I have also used the firewire side of the card to
attach an external firewire drive.
Could the problem be caused by something else?
Our c600 set up is as follows:
Sonnet Crescendo L2 G3/400 processor upgrade
Original 4GB IDE drive
18 GB SCSI drive
144 MB RAM
Apple CD-ROM (replaced original)
Sonnet Tango combo USB/Firewire PCI card
Matrox Mystique graphics PCI Card
Global Village Modem PCI Card
Asante Ethernet PCI Card
I have worked with Neal, in Sonnet's Tech Support area on several
problems we had in the past. I found him to be extremely knowledgeable
and friendly. I do know, from exchanging email with Neal, that Sonnet
has either a C600 or a C500 (can't remember which one) in their lab,
that they use for testing purposes.
Let us know what you find out.
Nancy
> On Friday, May 3, 2002, at 10:04 AM, Dennis B. Swaney wrote:
>
> I don't know how many have this problem with C500/C600 machines that
> have G3 Upgrade cards, but I thought that I'd tell you what I've
> learned.
>
> I have a C500 with a Sonnet Crescendo L2 G3 upgrade and a Sonnet
> Tango Firewire/USB card. Ever since I installed these last year, I've
> had a stuttering problem with system sounds, alerts, etc. I could get
> it to go away by deactivating my G3 upgrade card. Discussing this
> with Sonnet was of little help because they could not duplicate the
> problem.
>
> Well, I stumbled on a web site called the 6400 Zone that covers the
> Apple 6400/6500 machines and discovered that they have the same
> problem, which isn't surprising since the same logic board is used in
> all 4 machines. However, I also found out, on the site, that by
> disabling the USB extensions while leaving the G3 card activated also
> eliminated the problem! Since I don't have an USB need right now,
> that is the path I've taken.
>
> I've emailed Sonnet with my findings so maybe they can see what is
> conflicting between their Processor Upgrade Extension and USB.
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