my MacPro5,1 startet to behave erratically with the combination of the SAMSUNG XP941 plus CalDigit FASTA-6GU3 Pro. I had to wait ages until the EFI bootmenu appeared when I wanted to switch os. also, MS-Windows wouldn't boot anymore at about half of the attempts I tried it. went back to the inateck KT4004 and all is well again.
EDIT:
went to the inateck site and saw that there seems to be a new card from them (specifically for the Mac Pro):
http://www.inateck.com/inateck-kt7001-7-port-usb-3-0-pci-e-express-card/
Thanks for sharing this info. Probably advantageous to have various brands of USB 3.0 cards in case of compatibility issues. About the Inateck 7 ports USB 3, if I recall that card came out more than a year ago. http://www.amazon.com/Optimized-Por...qid=1423130011&sr=8-1&keywords=inateck+kt7001