The Allegro features a PCIe 2.0 bus interface to take advantage of your computer’s fast expansion card slots.
Though you can connect them to your computer’s USB 2.0 ports, their performance would be reduced by as much as 85 percent! Don’t settle for slow performance-install a Sonnet Allegro Type-A USB 3.2 PCIe 4-Port (1) card to instantly add four SuperSpeed USB 5Gbps ports to your system to take full advantage of today’s drives’ performance capabilities. Most drives available today include faster USB interfaces and offer significantly better performance than USB 2.0-equipped drives. Your computer’s USB 2.0 ports are perfectly adequate for connecting mice, keyboards, and printers, but if you need to connect external storage drives, USB 2.0 ports are underpowered in more ways than one-limiting data transfer speeds to around 25–30 MB/s, they can hardly be called “high performance”.