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Allegro USB 3.0 4-Port PCIe
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Driver (2)
Firmware (0)
Manual (2)
FAQ (5)
IDArticle TitlePost Date
736 When I connect a drive to the Allegro USB 3.0 PCIe card, my Bluetooth mouse gets sluggish or stops working.Nov-25-16
756 Do the Sonnet USB 2.0 or USB 3.0 cards support the Apple SuperDrive?May-27-15
759 When connected to the Allegro Pro USB 3.0 PCIe, Allegro USB 3.0 4-Port PCIe, Tango 3.0 PCIe, or Tempo Duo PCIe card, my bus-powered USB 2.0 or 3.0 drive or SSD will not reliably mount or transfer data.Jun-24-15
High power bus-powered drives are supported only by the Allegro Pro USB 3.0 PCIe (USB3-PRO-4PM-E), Allegro USB 3.0 4-Port PCIe (USB3-4PM-E), and 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), nor 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 USB storage connected to a PCIe USB 2.0, 3.0, 3.1 card (or combo card) gives an macOS error message upon wake from sleep.Dec-02-17
971 One or more of my ports has stopped working on my USB 3.0 card.Nov-19-17
The USB 3.0 4-port and USB 3.0 4-port Pro cards have resettable fuses to protect the ports from an overcurrent condition. To reset the fuses, you must remove power to the card by shutting down your machine. (Restarting is not sufficient.) After turning the computer back on, the ports should start working again. If the fuses continue to trip, the you may have a device that draws too much USB Bus power (more than 2 Amps).
 
 






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