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SATA II controller PCI v PCI-E

Last response: in Storage
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August 16, 2010 5:16:18 PM

Is there any distinct advantage of using a PCI-E card over a standard PCI? It's on a windows server 2003 machine. Simple answers will suffice :) 

Thank You.

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a b G Storage
August 16, 2010 5:20:55 PM

PCIe is a faste and newer standard then PCI
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August 16, 2010 5:23:19 PM

but both cards say the data transfer to the attached drives is the SATA II standard, 3.0gb/s
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a b G Storage
August 16, 2010 5:34:58 PM

then it really doesn't matter which you go with...
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August 16, 2010 5:36:24 PM

ok fair enough.
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August 16, 2010 6:12:47 PM

Best answer selected by tetracw.
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August 17, 2010 10:32:51 AM

PCI Bus has a max transfer rate of 133 MB/s

compared to

PCI Express 1x 400 MB/s
PCI Express 4x 1600 MB/s
PCI Express 8x 3200 MB/s
PCI Express 16x 6400 MB/
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August 17, 2010 10:24:01 PM

SATA II maximum bus throughput (per channel) is 3.0 gigabits per second, which translates to 375 megabytes per second. Only SSD drives come anywhere close to maximizing that throughput, though. Most SATA II hard drives will hover around 75-85 megabytes per second. Since PCI is limited to 133 megabytes per second with 32 bit paths, you are within tolerance unless you have an SSD. If you have an SSD, get the PCIe card.

Also keep in mind that most PCI cards will use older chipsets that might not support powerful AHCI features like native command queuing or hot swap, while most chipsets that use a PCIe interface will support these more modern features.
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a c 87 G Storage
August 18, 2010 4:44:41 AM

I believe that PCIe v2.0 uses 500MB/second for each line, not 400.

If you use a RAID0 and have two good SSD's hooked up (i.e. OCZ Vertex 2) then you can get about 500MB/second read and write (it only really drops off about 16KB which is small).

Wikipedia is your friend for stuff like this.
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August 18, 2010 4:55:39 AM

for a storage drive, pci is fine.

for a main drive, pci-e will be quicker.

pci-e > pci, but pic can do the job
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