About Us
The Professional's Source Since 1973
  • Help
  • 800.606.6969
Hello, Log InAccount & Orders
My Cart

Sonnet USB3-4PM-E Allegro 4-Port USB 3.2 Gen 1 PCI Express Card

BH #SOUSB34PME • MFR #USB3-4PM-E
 69 reviews
Sonnet USB3-4PM-E Allegro 4-Port USB 3.2 Gen 1 PCI Express Card
Key Features
  • Adds USB Connectivity
  • Dedicated Controller
The Allegro 4-Port USB 3.2 Gen 1 PCI Express Card from Sonnet is a PCI Express card equipped with four external USB 3.2 Gen 1 ports, with a PCIe 2.0 bus interface that allows you to take advantage of your computer's fast expansion card slots. This card installs easily into any PCI Express slot that supports a full-height card, and works with all USB-IF compliant USB 3.2 Gen 1 and USB 2.0, peripherals.
In Stock
$49.99
Save the Tax with the credit card.‡ 
Protect Your Gear
Add a protection plan from $5.99
Ask Our Experts
800.606.6969

Sonnet Allegro Overview

The Allegro 4-Port USB 3.2 Gen 1 PCI Express Card from Sonnet is a PCI Express card equipped with four external USB 3.2 Gen 1 ports, with a PCIe 2.0 bus interface that allows you to take advantage of your computer's fast expansion card slots. This card installs easily into any PCI Express slot that supports a full-height card, and works with all USB-IF compliant USB 3.2 Gen 1 and USB 2.0, peripherals.

Supports hot-pluggable and hot-swappable device connection-plug in and disconnect peripherals without shutting off your computer
Quick and easy installation into any available PCIe slot
USB attached SCSI protocol supported under OS X 10.8.5+ and Windows 8.1+
Optimized for Thunderbolt - Provides maximum performance over Thunderbolt
UPC: 732311009440

Sonnet Allegro Specs

General
Inputs/Outputs
4 x USB-A 3.0 / 3.1/3.2 Gen 1
USB Bus-Power Support
7.5 W per Port
Expansion Slot Compatibility
PCIe 2.0 x1
Software System Requirements
OS Compatibility
macOS 10.8 or Later
Windows 7
Windows 8
Windows 10
Windows Server 2008
Windows Server 2012
*As of August, 2020: Check with manufacturer for the most up-to-date compatibility
Physical
Certifications
RoHS
Packaging Info
Package Weight
0.325 lb
Box Dimensions (LxWxH)
8.65 x 5.35 x 1.35"

Sonnet Allegro Reviews

See any errors on this page? Let us know

YOUR RECENTLY VIEWED ITEMS

what are the physical dimensions?

what are the physical dimensions?
Asked by: Cyril
The Sonnet USB3-4PM-E Allegro 4-Port USB 3.2 Gen 1 PCI Express Card is a full-height, half-length card. The dimensions are as follows: 111.15 × 167.65 × 20.32 mm| 4.376 × 6.600 × 0.8 inches.
Answered by: calvinm
Date published: 2023-01-27

Will this be compatible with the new Mac Pro ...

Will this be compatible with the new Mac Pro 2019?
Asked by: ethan
I would assume the new Mac Pro has USB 3.0 ports. I purchased this to add USB 3 ports to my 2009 Mac Pro which had only USB 2.0.
Answered by: Lynn
Date published: 2020-03-13

Will this card work on PCI Express 1.0?

Will this card work on PCI Express 1.0?
Asked by: James J
You can but it is not recommended as there may be a performance hit.
Answered by: Gregorio M.
Date published: 2021-01-08

do need power supply with this card?

do need power supply with this card?
Asked by: David
No, the Sonnet USB3-4PM-E Allegro 4-Port USB 3.2 Gen 1 PCI Express Card BH #SOUSB34PME gets power from the PCIe slot.
Answered by: Miguel
Date published: 2021-01-10

Will this card work on PCIe 1.0?

Will this card work on PCIe 1.0?
Asked by: James J
Yes, although bandwidth would be limited to PCie 1.0 speeds.
Answered by: Miguel
Date published: 2021-01-10

What data transfer speeds are people getting with ...

What data transfer speeds are people getting with this card? I installed it on my Mac Pro 5,1 and the Black Magic speed test is only showing about 80-90 MB/s on a fairly new Western Digital USB3.0 external SSD. The Samsung SSD I have in the other PCIe slot is getting around 1300MB/s so I know it's not the computer. Western Digital's specs for this SSD are up to 5gbps. I was expecting at least around 500MB/s with this card.
Asked by: Chris
We haven't tested it in your scenario. But the max theoretical limit of USB 3.1 Gen 1 is 625MB/s. You may wish to try your WD SSD on another port, not using this card and/or on another computer.
Answered by: Daniel
Date published: 2021-03-25

play and plug vs a card need power?

play and plug vs a card need power?
Asked by: David
The card needs a driver/software for both Windows and MAC. Please see user guide for more info: https://www.bhphotovideo.com/lit_files/621755.pdf
Answered by: Daniel
Date published: 2021-01-13

Does this card come with a low profile bracket?

Does this card come with a low profile bracket?
Asked by: Jancarlos
No, the Sonnet USB3-4PM-E Allegro 4-Port USB 3.2 Gen 1 PCI Express Card BH #SOUSB34PME does not come with a low profile bracket.
Answered by: Miguel
Date published: 2022-07-10
  • y_2023, m_9, d_24, h_3CST
  • bvseo_bulk, prod_bvqa, vn_bulk_3.0.35
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_17
  • loc_en_US, sid_1016794, prod, sort_[SortEntry(order=HAS_STAFF_ANSWERS, direction=DESCENDING)]
  • clientName_bhphotovideo