On 15 Feb 2008, at 15:57, Volker Armin Hemmann wrote:
...
I tend to think of PCI-X just as "long PCI" or only-a-bit-faster-than
PCI.
you think wrong.
...
PCI-X is A LOT faster than PCI, faster than PCIE 1x, 2x
Ooops.
Hi Volker,
My apologies for posting misleadingly & my thanks to you for
correcting my embarrassingly-incorrect understanding.
I think I must've misread "64-bit PCI" for PCI-X on this table when I
was doing my homework a few weeks ago:
http://en.wikipedia.org/wiki/List_of_device_bandwidths#Computer_buses
Looking at the 3ware / AMCC high-end RAID controller cards (which are
excellently supported under Linux) I find that the manufacturer seems
to currently be abandoning PCI-X for PCIe. Why is this, in the case?
I also read that:
... while standard PCI-X (133 MHz 64 bit) and PCIe x4 have roughly
the same data transfer rate, PCIe x4 will give better performance
if multiple device pairs are communicating simultaneously or if
communication within a single device pair is bidirectional.
<http://en.wikipedia.org/wiki/PCI_Express#Overview>
I'd guess that few motherboards have many PCIe x4 and x8 slots, and -
apart from graphics cards - few devices utilise them fully. Don't you
think, however, that this is likely to become a lot more common in
the next couple of years? Are manufacturers currently announcing
brand new products based on PCI-X?
Stroller.
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