AnandTech: "Why go from SATA to PCI-X then to PCIe? Cost. These Silicon Image PCI-X controllers are dirt cheap compared to native PCIe SATA controllers, and the Pericom bridge chip doesn’t add much either. Bottom line? OCZ is able to offer a single card at very little premium compared to a standalone drive. A standard OCZ Vertex 2 E 120GB (13% spare area instead of 22%) will set you back $349.99. A 120GB RevoDrive will sell for $369.99 ($389.99 MSRP), but deliver much higher performance thanks to you having two SF-1200 controllers in RAID on the card.
You’ll also notice that at $369.99 a 120GB RevoDrive is barely any more expensive than a single SF-1200 SSD, and it’s actually cheaper than two smaller capacity drives in RAID. If OCZ is actually able to deliver the RevoDrive at these prices then the market is going to have a brand new force to reckon with."