USB3 Ports and eSATA Ports on Older Mac Pro: NewerTech MAXPower eSATA 6G + USB3 PCIe Card
Add two eSATA and two USB3 ports to your older Mac Pro with the NewerTech MAXPower eSATA 6G + USB3 PCIe Card. This card will be tested soon here at MPG.
UPDATE: there are two variants of this card, one driverless xHCI card that does not support sleep, and one card that requires a driver and supports sleep. Details.