[CentOS] Re: server network card

John R Pierce pierce at hogranch.com
Wed Oct 17 15:56:05 UTC 2007

Scott Silva wrote:
> By the specs on the Intel site they are the same adapter with a 
> different interface.
> The PCI-x cards are starting to be more expensive, but 6 months ago it 
> was the other way around.
> I think PCI-X in a 133Mhz slot would be just as fast as PCI-E 1x.
> It is more dependent on how many and what type of slots your server has.
remember PCI_X is 64bit wide, so even at 100Mhz, its 6x faster (2x wide, 
3x clock speed) than desktop PCI....  I think pci-e 1x is only about 
twice as fast as desktop PCI (250MB/sec vs 133MB/sec burst rate).  PCI-X 
100Mhz is ~800MB/sec

of course, a gigE interface only needs 200MB/sec sustained

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