When it comes to supporting the fastest USB drives available, your computer’s USB 3.0 ports are perfectly adequate…for connecting peripherals that don’t depend on the ultimate USB 3.2 speeds. However, common USB 3.0 ports can be underachievers—at 5Gbps, they can’t support the maximum performance from many storage devices, and may not provide enough power to enable them to operate. You need SuperSpeed USB-C®!

The Allegro™ USB-C PCIe⁽¹⁾ card supports data transfers at up to twice as fast as USB 3.0, and can also deliver 15W of power per port to USB-C bus-powered devices (three times the 4.5W specified in the USB 3.0 spec). Don’t settle for mediocre performance or insufficient power for the fastest SSDs—install an Allegro USB-C card to instantly add two Gen 2 USB 3.2 ports to your system and take full advantage of today’s SSD performance.

• All of the adapters read and write to SD cards, and we tested one model—the IOGEAR USB-C 3-Slot Card Reader/Writer—that also accepts larger CompactFlash (CF) cards still used by some high-end.
• An inexpensive card available from Amazon allows users of Apple's Mac Pro tower with PCI-E slots to get some of the benefits of the new USB-C connector — and faster USB 3.1 speeds.
• Inateck 2 Port PCIe USB 3.0 Card with Internal USB 3.0 20-Pin Connector - Expand Another Two USB 3.0 Ports, Compatible Mac Pro, No Additional Power Connection Needed 4.6 out of 5 stars 846 $19.99 $ 19.

Full Power

USB C Hub,USB C Adapter for MacBook Pro/Air,7 in 2 Thunderbolt 3 Type C Adapter Dongle MacBook Pro Accessories,3 USB 3.0 Ports,TF SD Card,PD Compatible for MacBook Pro/Air 13' 15' 2018 2019 2020 4.6 out of 5 stars 2,280 $15.99 $ 15. The KT4004 PCI- E express card adds 4 USB 3.0 Ports to your Mac pro with quick and easy installation. This USB 3.0 PCI express I/O Card offers an excellent solution to use more USB 3.0 devices on Mac pro (Early 2008 to 2012 Late Version). Enjoy copying videos, music, photos, data files between USB devices and the Mac at blazing fast speeds.

Sonnet specially engineered the Allegro USB-C card to provide 15W of power through each of its ports. The ports communicate with the host that 3A of VBUS current is available, enabling this Sonnet solution to support USB-C bus-powered SSDs and SSD RAID devices that need 15W during demanding write operations.

The Sonnet Speed Advantage

Usb 3 Pcie Card Mac

Usb 3 Cards Mac Pro

Featuring the latest high-performance USB 3.2 Gen 2 controller from ASMedia—the ASM 3142—the Allegro USB-C PCIe card supports concurrent data transfers up to 925 MB/s when connected to a two USB-C Gen 2 NVMe SSD devices! Most other cards limit concurrent transfers to half that, a significant disadvantage when time is of the essence.