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20 lis 2019 · USB 2.0 - High Speed, USB 3.0, and USB 3.1 Max Polling Rate: 8000 Hz *Keep in mind, however, that there are other factors that can impact peripheral performance, such as your operating system, and device drivers.
Usb 2.0 has a latency of about 125 microseconds. Unlike 2.0, usb 3.0 is not a shared-bus system. Instead it uses a point-to-point link between the host and each device which can help decrease the latency by a significant amount (in terms of multiples, still not noticeable at all).
In USB 2.0 the polling interval was 0.125ms, so the best possible latency for the host to read some data from the device was 0.125ms. I'm hoping for reduced latency in USB 3.0 devices, but I'm finding it hard to learn what the minimum latency is.
14 lip 2014 · However, you should check to see that your laptop (Windows device) actually classifies the USB 3.0 connection as a "super" data rate capable connection. There are four USB specs: 1.0, 1.1, 2.0, and 3.0. But to confuse things, each USB spec has more than one data rate assigned to it.
When taking into account protocol overheads, latency, and flow control, the fastest USB 3.2 Gen 1 device should operate at near 450Mbytes per second whereas a USB 3.2 Gen 2×1 device – in best case scenario – should perform at 1.1Gbytes per second under ideal conditions. But your mileage may vary depending on the system.
20 cze 2012 · All of the sudden, USB 3.0 is down another 100 MB/s. Even at 400 MB/s, though, we're still looking pretty good compared to USB 2.0's sub-40 MB/s performance.
15 sty 2018 · I would appreciate a slowest to fastest list including USB 2.0, USB 3.0, FireWire 400, FireWire 800, eSATA and Thunderbolt considering bandwidth that is consumed by command and control (reducing the data bandwidth availability). The answer selected and upvoted is incorrect.
