USB3.1 Gen1 loop back plugs super speed criterion

[Daniel Su]

Hi,
Do you have USB3.1 Gen1 super speed criterion on Benchmark read or write?

Test environment:
Platform: Coffee Lake-S refresh
OS: Windows 10 Pro 1903 64-bit

USB loop back plug
USB3Test V2.0 1007
Plug Info: HW Version 1.1, FW Version V2.5
Test mode: Benchmark

thanks.

[David (PassMark)]

USB3.0 is also now known as USB 3.1 Gen 1 (and also known as USB 3.2 Gen 1, to add to the confusion). And this is what our USB3 plugs support.

However we don't have a product that supports, USB 3.2 Gen 2 or USB 3.2 Gen 2x2 as yet. We are hoping to have a USB 3.2 Gen 2 product in early 2020 however. Depending on the availability of suitable silicon.

In terms of expect real life speeds, see this USB3 FAQ page. And the question on that page, What maximum speed should I expect from my USB port?

[Daniel Su]

Hi David,
I had seen "What maximum speed should I expect from my USB port?", but our project which the maximum read/write data rate is 33xx Mb/s.
Does it can meet super speed criterion?
thanks.

[David (PassMark)]

The best (real world) speeds we have seen are around 3500Mb/s. Worst are around 2400Mb/s.

You never reach the theoretical 5Gb/s because of 8b/10b encoding and protocol overheads.

3300 Mb/s is acceptable (in my opinion)