Archived from groups: alt.comp.hardware.pc-homebuilt (
More info?)
Kev wrote:
> "David Maynard" <dNOTmayn@ev1.net> wrote in message
> news:10ep89m3v338cfa@corp.supernews.com...
>
>>Kev wrote:
>>
>>
>>>Hi, my motherboard has an empty PCI slot next to the AGP slot. I heard
>>>somewhere that the PCI slot to the AGP can only be used if the AGP slot
>>>isn't in use, is that correct?
>>>
>>>
>>
>>No.
>>
>>However, the PCI slot adjacent to the AGP slot shares IRQs with AGP (the
>>AGP slot is actually an 'extension' of that PCI slot) and that can create
>>problems with certain cards, most notably sound cards (especially if they
>>has a 'DOS compatibility' mode which emulates ISA use, which is NOT
>>'sharable' like PCI IRQs are).
>>
>>The same situation occurs with PCI slots past 4 as they are 'expansion'
>>slots from the 4'th and can have problems if incompatible PCI cards are
>
> put
>
>>in them; again, most notably, sound cards.
>>
>>It comes from the nature of the PCU bus, which is 4 slots. More than that
>>and they are, by definition, 'expansions' from the 4 primary slots. And
>
> AGP
>
>>is a PCI slot 'plus' the AGP memory access. In fact, until there is any
>
> AGP
>
>>memory used, an AGP display card is equivalaent to a PCI display card.
>>
>
>
> Hi, do you think there would be any problems having a usb2 card installed
> next to a 128MB Radeon 9800Pro video card? Cheers.
>
Probably not but, as a general rule, I try to avoid having network cards,
and other high data rate devices, sharing with the display.