Question of PCI bandwidth affect on SW RAID arrays.

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Quick question,

On older systems, regular PCI motherboards, no PCI-e-- which is faster?

1) One 4 port SATA150 card in 1 PCI slot which has 4 drives connected.
2) Four SATA150 cards in 4 PCI slots, which each have 1 drive connected?

I'd assume 2 would stress the PCI bus more and thus would be slower, but I 
am curious what other people know/think/etc?

Thanks,

Justin.
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