"Greg Sevart" <[EMAIL PROTECTED]> wrote: > Is there actually any appreciable difference in cost? > > 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.
http://www.pcguide.com/ref/mbsys/buses/funcBandwidth-c.html Note: You may be somewhat confused by the bandwidth numbers I have listed in the table above. For example, shouldn't the bandwidth of standard PCI be 32/8*33.3=133.3 MB/sec? This is how most people and even companies write it, but this is not technically correct, because of the old problem of different definitions of what "M" stands for. The "M" in "MHz" is 1,000,000 (10^6), but the "M" in "MBytes/second" is 1,048,576 (2^20). So the bandwidth of the PCI bus is more properly stated as 32/8*33.3*1,000,000/1,048,576=127.2 MBytes/second.
