[mythtv-users] ITX vs ATX for dual-DVB system

[R. Geoffrey Newbury]

On Sun, 9 Oct 2005 00:05:28 +0100, Nick wrote:

>On 08/10/05, Jules Bean <jules at jellybean.co.uk> wrote:
>> Does anybody have any feedback on this? It's the PCI riser I'm most
>> scared about, I don't understand PCI deeply enough at the hardware
>> level to know if they provide good enough performance for two DVB
>> tuners running in parallel.
>
>The obvious solution - dual tuner DVB cards - are on the horizon, so
>it depends how long you are prepared to wait! My Pundit-R system has 2
>PCI cards on a riser (PVR and DVB-T) with no problems. The data rates
>transferred over the bus are very small compared to its capacity, so I
>wouldn't expect to have any problems with just 2 cards.
 Via make a 2 slot pci riser card. It has on board circuitry to provide
power and IRQ control to both slots. (Most PCI riser cards require that a
small daughter finger card be put into the second PCI slot to provide
those capabilities to the second PCI slot).
The Via card is specifically for the Travla cases I think, as the rise of
the card must match the case mounting for the boards.

However, if your case has the wrong spacing, the answer is to use a
flexible extension between the VIA board and the Via PCI riser. That way
you can meet any reasonably combination of horizontal and vertical
displacement between where the motherboard has its PCI slot and where the
case has its rear mounting slots.

Geoff 
R. Geoffrey Newbury                          newbury at mandamus.org
Barrister and Solicitor                         Telephone: 905-271-9600                 
Mississauga,Ontario, Canada              Facsimile:   905-271-1638