15 Aug
2010
15 Aug
'10
10:10 p.m.
I'm just curious if something like this will work with Linux audio cards?
http://www.beaglesoft.com/pcie2pci.htm
/////////////////
PCI Express to PCI Adapter
featuring PLX Technology PEX 8111 PCI to PCI Express bridge
PCI Express x1 cards have been scarce since the introduction of the
bus several years ago. We now offer a PCI Express x1 adapter for
server or desktop PCs that converts PCI Express x1 bus to PCI. The
adapter utilizes a PLX Technology PEX 8111 PCI to PCI Express bridge
chip. It will accept standard or low profile PCI cards. As a generic
PCI to PCI Express adapter it should work well with most PCI cards.
This adapter allows you to use your existing PCI cards in the PCI
Express slot of your mother board. It can accept one of the half
height cards designed for 2U server chassis environments, such as a
Fire wire or Gigabyte Ethernet card. The 32bit 33MHz adapter’s 4 pin
connector is connected directly to the power supply of your PC. The
heat generated by the card is very low. The adapter has a bracket with
a large gap to allow you to plug things into the card. The adapter
will also accept a full height PCI card if your case has the extra
headroom to accept a higher card.
/////////////////
the above cards, however, seem overpriced given they're available for
about $28.00 w/ shipping from Hong Kong:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=220652485942
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=320574364611
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=220595038826
Niels
http://nielsmayer.com
PS: one useful additional feature such cards might provide -- since
the pcie x1 riser uses an ATX-style 12&5v power connector, that means
you could use a separate power supply from the main computer's to help
isolate the analog section from computer noise.
16 Aug
16 Aug
8:21 a.m.
Niels Mayer wrote:
I'm just curious if something like this will work
with Linux audio cards?
PCI Express to PCI Adapter
Yes.
the above cards, however, seem overpriced given
they're available for
about $28.00 w/ shipping from Hong Kong:
There are sound cards with PCIe/PCI bridge chips; and at the moment,
the market price difference between Xonar DX and Xonar D1 is _negative_.
These adapters are useful only if you need some features of a PCI card
and if your mainboard has already run out of free PCI slots.
Regards,
Clemens
8:50 a.m.
On Sun, Aug 15, 2010 at 11:21 PM, Clemens Ladisch <clemens(a)ladisch.de> wrote:
These adapters are useful only if you need some
features of a PCI card
and if your mainboard has already run out of free PCI slots.
Hopefully "all features" of the PCI card would be available, right?
There wouldn't be any bus-mastering issues, etc?
Would there be any additional issues with combining multiple ice1712
cards where some might be on PCI and some on converted PCI-e? Cards
like Terratec EWS88 or M-Audio Delta claim to share interrupts when
multiple cards of the same type are installed. I would imagine in a
PCIe slot that might not be the case? (Or is ice1712 resource sharing
across cards a windows-specific feature?)
Also, the "literature" from the URLs posted earlier states:
////////////////
Technical benefit: A card in the PCIe slot gets the full dedicated PCI
bandwidth, one of the key benefits of the PCIe Point-to-Point
infrastructure. This contrasts with a traditional PCI bus system
where the card would have to share the resources with cards in the
other slots, and any on-board PCI controllers, such as SATA adaptors
or Gigabit Ethernet, which can be quite bandwidth hungry.
////////////////
Seems like this could be an interesting solution for those suffering
from graphics-card bus-contention with their soundcard.
(Not me I'm running low-end mobo-integrated ATI ... but you hear about
it...). The ultimate variation of the "move soundcard to a different
PCI slot" solution, I guess :-) .
-- Niels
http://nielsmayer.com
9:19 a.m.
Niels Mayer wrote:
On Sun, Aug 15, 2010 at 11:21 PM, Clemens Ladisch
<clemens(a)ladisch.de> wrote:
Yes. No.
These adapters are useful only if you need some
features of a PCI card
and if your mainboard has already run out of free PCI slots.
Hopefully "all features" of the PCI card would be available, right?
There wouldn't be any bus-mastering issues, etc? Would there be any additional issues with combining
multiple ice1712
cards where some might be on PCI and some on converted PCI-e? Cards
like Terratec EWS88 or M-Audio Delta claim to share interrupts when
multiple cards of the same type are installed. I would imagine in a
PCIe slot that might not be the case?
You'd have multiple independent PCI buses. However, those interrupts
still must be mapped to some of the interrupt controller's interrupts.
This mapping is probably different, but there might be more or less
sharing.
Also, the "literature" from the URLs posted
earlier states:
////////////////
Technical benefit: A card in the PCIe slot gets the full dedicated PCI
bandwidth, one of the key benefits of the PCIe Point-to-Point
infrastructure. This contrasts with a traditional PCI bus system
where the card would have to share the resources with cards in the
other slots, and any on-board PCI controllers, such as SATA adaptors
or Gigabit Ethernet, which can be quite bandwidth hungry.
////////////////
This is true.
Seems like this could be an interesting solution for
those suffering
from graphics-card bus-contention with their soundcard.
From what I've heard, the problem with graphic
cards is not memory
bandwidth but CPU-hogging drivers.
The ultimate variation of the "move soundcard to
a different
PCI slot" solution, I guess :-) .
You still get a different interrupt if you put a card into a different
PCIe slot.
Regards,
Clemens
5242
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days old
linux-audio-user@lists.linuxaudio.org
3 comments
2 participants
participants (2)
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Clemens Ladisch -
Niels Mayer