Has anyone compared SWRAID for (JBOD@HW-RAID) vs. (Regular Sata PCI-e cards)?

[Justin Piszcz <jpiszcz@xxxxxxxxxxxxxxx>]

I was curious if you have for example 5 PCI-e x8 slots:

1. 2x sata port card
2. 2x sata port card
3. 2x sata port card
4. 2x sata port card
5. 2x sata port card

Would that be faster than:

1. 16port 3ware (or) 16port areca
   drives -> jbod

Does anyone here use SW RAID on the second configuration with 10,000 rpm 
drives or more than ~10 drives in a RAID5?  If so what kind of read/write 
speed do you achieve?  I am curious if a single card with that many ports, 
even running jbod can really push the bandwidth you achieve by splitting 
the drives up over multiple PCI-e slots as shown in the first example.

Justin.
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