At 10:27 AM 12/19/2007, you wrote:
Is there actually any appreciable difference in cost?

Oh yeah, huge,  twice as much or more on Ebay.



But, to answer your question, the PCI bus (assuming standard 32bit/33MHz) is
limited to an aggregate theoretical 133MB/s, so even SATA150 can saturate
the entire bus.
Greg


That is what I figured, thanks, why would they make a PCI 3MB/s controller... just marketing?



>
> I have a older P4 3.4 rig I want to add some SATA ports to. I don't
> want RAID. I will probably get a new/or used 4 port Promise
> controller. Is there any good reason to pay for a 3MB/s controller as
> opposed to a 1.5? Seems to me a PCI bus couldn't handle that kind of
> bandwidth anyway..... am I right?

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