I have seen conflicting information regarding USB 3.0 cards, I would assume since newer macs now have native usb3 that it would be no problem to get a PCIe slot expansion for usb3 now. However, I am unsure about which would be a good PCIe USB3.0 to get, I have seen mixed reviews and have not seen a general consensis on what works and what doesn't. I am on osx 10.6 and would be willing to upgrade if it meant 3.0 support, I assume I would be getting a multiport hub as well so I can have the ports right on my desk as apposed to crawling under my desk to plug something in all the time. I mainly want to use this for a fast CF card reader as I am looking to get two of these http://www.bhphotovideo.com/c/product/735435-REG/AJA_KI_PRO_MINI_R0_Ki_Pro_Mini_Compact.html for video work and I am assuming a 3.0 card reader would be much for efficient then a 2.0 card reading, especially when transferring 30-60GB of data... and I of course want to use this for external HDD enclosures as well, although my main drives run an a miniSAS raid enclosure, this is mainly for transferring data from portable drives. So does anyone have any suggestions on a USB 3.0 PCIe slot that actually works for a MacPro 4,1?