CalDigit FASTA 2 port eSATA & 2 port USB 3.0 PCle. This was one of the first USB3 card for Mac Pro and comes with drivers from Caldigit. These will only work with Mac OSX versions from 10.5 - 10.9. It won't work with later OS versions! Has two USB 3 and two eSata ports.
More information here.