[mythtv-users] Mobo upgrade to support 3 DVB tuner system (previous irq problems)

Steven Adeff adeffs.mythtv at gmail.com
Sun Apr 16 04:10:52 UTC 2006


On 4/15/06, Ben <debian-list at blueturtles.com> wrote:
> Joe Votour wrote:
>
> > > If you want a budget platform, then socket 754 may be
> > > a good choice.  Right now, I have an Athlon64 3200+ in
> > > a socket 754, and it's barely enough for HD.  And for
> > > me, now that I've seen HD (on a HDTV), there's no
> > > going back.  (Though I am in the process of setting up
> > > a dedicated backend and frontend system to see if that
> > > helps matters out any, as I don't want to spend money
> > > for a new motherboard/CPU).
> > >
> > >
> >
> I'm stuck with SD for a while yet as my toddlers would make short work
> of nice HDTV. So even a sempron 3100+ is overkill.
>
> > > If you want performance or dual-core, then you have to
> > > go with socket 939 - so, it depends on your needs.
> > > You can get a Sempron with socket 754 for a while,
> > > according to the article.
> > >
> > > As to your IRQ problems - do you use USB at all on
> > > that machine?  If not, then you might want to try
> > > disabling it, as that is what looks like the IRQs deal
> > > with (from your dump).  It's a something to try if you
> > > haven't already.
> > >
> >
>    Unfortunately I do use the USB for my streamzap remote.
>
> My concern is really PCI bus bandwidth. Are 3 PCI tuner cards + 1 pcmcia
> wireless NIC / AGP always going to cause problems?  Am I just trying to
> push too much data across a bus in excess of  its design limits?  In my
> case slots 1 & 5 share an irq with the AGP port (so having four cards is
> always going to share something & the pcmcia only likes to play in slot 2)
> From some of the reading I have been doing even the some socket 939 can
> have problems, particularly with a SATA controllers.     It seems to be
> dependant on which & how many components share irq lines / quality of
> the motherboard & BIOS code. But this is only what I read, there is no
> substitute for actual experience.
> Some motherboards seem  to have two independent PCI busses.  Does this
> actually increase bandwidth or are they just cascaded?

I've got 3 DVB ATSC tuners a PVR150 and a firewire cablebox all on the
same mobo, I've recorded from all 5 at the same time with no problems.

--
Steve


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