Just was wondering if anyone has tried this on a Mac Pro (2009,2010 & 2012) and what type of speeds can be obtained. What is the max speed per bay? What would be the Max speed of all four bays together? Can it be done?!?! Is it worth it for approx $400 for HDDs & $700-800 for SSDs? Just asking because I was going to try this on our 2009 Mac Pro with 4 of the new Seagate drives (approx 200MB/s each) but then was thinking of 4 SSDs to try and max out the SATA bus. Speed is more of a priority than storage. System stuff & Photoshop Primarily. The other option is to get an OWC Accelsior PCIe SSD. Any advice, thoughts or suggestions would be greatly appreciated seeing that we are a Non-Profit and have to watch how we spend our money. Thank You. God Bless.