Three fast hard drives will perform well but not quite at unthrottled speed, and even a single SSD will not run beyond about 430 MB/sec. USB3 bandwidth on the Mac Pro is adequate for two fast hard drives used simultaneously. Test results show that this controller offers inferior performance to native USB3 on the 2013 MacBook Pro Retina, even setting aside the inherent bandwidth limitations. The USB3 implementation in the 2013 Mac Pro is not native to the chipset and is handled by a separate controller chip*. Real-world speeds are always below theoretical. The 2013 Mac Pro also has four USB3 ports which together share a single PCIe 2.0 lane, which means the Mac Pro aggregate USB3 unidirectional bandwidth cannot exceed 500 MB/sec (1000MB/sec in each direction, e.g. See also MPG’s computer gear wishlist as well as diglloyd-recommended performance packages for Mac Pro.

Send Feedback Related: 2013 Mac Pro, bandwidth, hard drive, laptop, Mac Pro, MacBook, MacBook Pro, Macs, RAID, SSD, Thunderbolt, USB

Usb 3 card for mac