Allegro USB 3.0 PCIe
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Driver (3)
Firmware (0)
Manual (2)
FAQ (9)
IDArticle TitlePost Date
523 Does the Sonnet Allegro USB 3.0 PCIe card support the Blackmagic Intensity Shuttle, Pocket UltraScope, and UltraStudio Pro?May-03-11
641 Why is my USB 3.0 card reporting a USB 2.0 connection to a USB 3.0 storage device?Jan-10-12
The card is actually making a USB 3.0 connection and it is just a reporting bug.
 
668 Does my Sonnet USB 3.0 card work with OS X 10.7.5?Sep-04-12
681 Are Sonnet's USB 3.0 cards compatible with OS X 10.8 (Mountain Lion)? Sep-04-12
Yes, when you install the Sonnet USB 3.0 Driver (Mac) version 1.0.8 or later.
 
726 Does the Allegro USB 3.0 card support bus-powered drives? Nov-27-13
732 Do the Sonnet Allegro USB 3.0 cards support Thumb Drives?Oct-24-13
Yes, all the Thumb Drives Sonnet has tested are compatible.

Sonnet has tested the:
•ADATA Superior Series S102 Pro USB 3.0 Flash Drive (\f1 82 MB/s read - 21 MB/s write)\f0
•Lexar JumpDrive S73 USB 3.0 Flash Drive (\f1 37 MB/s read -12 MB/s write)\f0
•SanDisk Extreme USB 3.0 Flash Drive (\f1 180 MB/s read - 145 MB/s write)\f0
•Transcend JetFlash USB 3.0 Flash Drive (\f1 39 MB/s read - 34 MB/s write)
 
756 Do the Sonnet USB 2.0 or USB 3 cards support the Apple SuperDrive?Apr-02-22
759 My bus-powered USB 3 drive or SSD will not reliably mount or transfer data.Dec-14-19
High power bus-powered drives are supported by the current and recent line of Sonnet USB 3 cards, plus the Tango 3.0 PCIe (FW8USB3A-E) cards, but not the discontinued USB 3.0 PCIe cards (USB3-E or USB3M-E), the initial version of the Tango 3.0 PCIe card (FWUSB3-E), or any USB 2.0 cards.

If you are still having trouble, this may be a problem due to a voltage drop in the USB cable. Use the following guide to select the correct cable for your application.

In general, these cables should work with SSDs or optical drives drawing up to 2A of current:

Type........Power-Carrying Wires....Cable Outside Diameter....Maximum Cable Length
USB 2.0..........28 AWG...............................3.8mm...........................0.15m (0.5 ft)
USB 2.0..........24 AWG...............................4.7mm...........................0.3m ( 1 ft)
USB 2.0..........22 AWG...............................5.0mm..............................1m ( 3 ft)
USB 3.0..........20 AWG...............................6.0mm..............................1m ( 3 ft)

Generally, the gauge of the power-carrying wires can be inferred from the cable outside diameter.
 
817 Storage connected to a USB 3 PCIe card (or Tango combo card) gives an macOS error message upon wake from sleep.May-12-20