View Full Version : Re: PCI vs PCI express

07-06-2005, 05:25 PM

you should try to use DUAL channel Firewire PCI cards. These are normal PCI
(not PCI express) cards with TWO independent IEEE-1394 bus systems on it. In
'device manager' they appear as two Firewire adapters.
This will cut down the number required slots to only two and you will have
no problems in finding motherboards. It will probably be cheaper then the
new PCI express technology, too.
We are using these DUAL channel cards for capturing 6 or more DV cameras
with our motion analysis software TEMPLO and they are fine.


I am not too familiar with the APAS system but I do not expect any problems.
We also use a A/D converter at the same time without problems.

The PCI bandwidth is more than enough to handle the data rate of several DV
cameras connected to a single PCI card (e.g. 6 cameras with 3.5 MB/s each
require approx. 20 MB/s. PCI has 133 MB/s).

Most modern DV cameras are 'cooperative', i.e. they can be connected to the
same bus anyway. In this case you do not need a Firewire bus for each
If you have JVC-9x00 models: They are not cooperative.

Please feel free to contact me if you need further information.


Thomas Seeholzer

Contemplas GmbH
+49 (08133) 918295

> -----Original Message-----
> From: * Biomechanics and Movement Science listserver
> [mailto:BIOMCH-L@NIC.SURFNET.NL] On Behalf Of Don Hoover
> Sent: Wednesday, July 06, 2005 9:35 PM
> Subject: [BIOMCH-L] PCI vs PCI express
> Colleagues:
> We have an APAS system and wish to build a deskstop CPU that
> will allow
> us to collect data in real time from either four (4) cameras
> OR from one
> (1) A/D board (never at the same time), giving us a need for
> a unit with
> five (5) open PCI expansion ports. However, many manufacturers have
> gone away from CPUs configured with so many open expansion
> ports. Our
> IT consultant on campus has come up with a possible solution
> using the
> newer technology of the PCI express. Consequently, we're very
> interested in learning if others have successfully used the
> PCI express
> application to capture with multiple cameras simultaneously with APAS
> (or a similarly designed motion analysis system), learing about
> potential caveats of this hardware configuration, etc. More
> technical
> specifications are listed below.
> The motherboard on this computer has 2 PCI express slots and I have
> ordered 2 firewire cards that are built to work with PCI
> express. These
> will support 2 cameras each. There are also regular PCI slots on the
> motherboard so the analog card that you get from the company
> will work
> just fine.
> PCI will transfer 133 MB/sec from a peripheral device.
> PCI express will transfer 250MB/sec from a peripheral device.
> The increase in bandwith availability in the PCI express architecture
> will allow for 2 cameras to utilize the card without loss of data.
> I will compile and post the results of this query. Thanks in advance,
> Don Hoover, PT, PhD
> Assistant Professor
> Krannert School of Physical Therapy
> University of Indianapolis
> 1400 East Hanna Avenue
> Indianapolis, IN 46227
> 317-788-3500
> dhoover@uindy.edu
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