No additional power supply for normal recognition and operation needed anymore, optimized board plane architecture, fast and easy installation, keeps your Mac Pro case tidy - With quick and easy installation, this PCI Express card expands your Mac Pro by four high-speed USB3.0 interfaces, offers a simple solution for connecting to USB 3.0 devices from your Mac Pro
Support UASP: 70% Faster than traditional USB 3.0 with UASP. The UASP Transfer Protocol only can accelerate read and write speed of SSD hard disk.
Supported Operating Systems - Compatible with Windows XP/ Vista/ 7/ 8/ 10. Windows 10 and Mac 10.8.2 and more latest systems are built with a driver inherently. Windows systems earlier than Windows 10 and Mac OS earlier than Mac 10.8.2 require installing a driver in CD
Power Usage Alerts - For stable operation, do not connect it to more than two high power-consuming devices, such as 1 TB hard drive. -For Mac OS users, the devices on the PCI-E card will disconnect if the computer goes into sleep. -This USB 3.0 express card is not meant to serve as a stand-alone charger.

Extend with 2 USB 3.0 Type C, 5 Type A downstream ports for standard desktop PC
Compliant with USB 3.0 specification.
Compatible with USB 2.0 & 1.1 specification.
Date transfer rates up to 5.0Gbps - 10x faster than USB2.0
Plug & play and hot swapping capability.
Bus-powered mode and no external power required for most of peripherals.
If the card doesn't work properly from the start, you may try out the following steps
Step 1: de- and reattach the devices to be recognized, so the system can try another recognition search.
Step 2: Augment with the power supply, so an automatic search can be retried.
Step 3: Check the PCI-E socket on the main board for possible faults.
Step 4: Try out another Mac Pro, if available, to determine