LOL, let me address that last question first:
The Serial ATA controller on the A7N8X Deluxe is a PCI device! So what it really boils down to is the efficiency of the controllers and adapters. A top notch PCI RAID controller would perform better, but when it comes to ordinary controllers, your guess is as good as mine!
<font color=blue>Watts mean squat if you don't have quality!</font color=blue>