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Allegro Type-A USB 3.2 (3.0) 4-Port PCIe Card
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Driver (1)
Firmware (0)
Manual (2)
FAQ (7)
IDArticle TitlePost Date
736 When I connect a drive to an Allegro USB 3 PCIe card, my Bluetooth mouse gets sluggish or stops working.Dec-14-19
756 Do the Sonnet USB 2.0 or USB 3 cards support the Apple SuperDrive?Jun-29-20
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
971 One or more of my ports has stopped working on my USB 3 card.Dec-14-19
1080 What is the difference between USB 3.0, 3.1 and 3.2?Dec-14-19
1099 What makes Sonnet USB 3.2 Cards more reliable than other USB 3 cards?Apr-03-20
 






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