On Tue, 22 Aug 2006 09:56:39 -0400
"Timothy Miller" <[EMAIL PROTECTED]> wrote:
> > My suggestion would be to go PCI express and make the card adapt from
> > 1/4/8 lanes. That way I can plug it into an extra 1 lane socket for
> > development and an 8/16 lane socket for general use. There is no real
> > gain going from 8 to 16 lanes for any existing apps.
>
> Do you know how complicated it is to go from 1-lane to 4-lane? Plus,
> I'm not sure we could make good use of the extra bandwidth anyhow. If
> OGC1-PCI will feel fast (and I know it will), there's nothing that
> PCIe 4x is going to give us that 1x won't.
Apropos PCI vs PCI-e, IIRC OGD1 is supposed to be 64bit 66MHz.
This gives roughly 500MByte/s of speed, which is roughly what
you would get from a 1-lane PCI-e interface.
Would it be an idea to use a PCI-e to PCI interface chip
for the first PCI-e versions of OGD/OGA? Then we could save
the whole process of engineering and testing a part of
a chip that is very difficult to do.
Attila Kinali
--
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