Windows 10: How to distinguish USB 3.2 gen 2 10Gb/s and gen 2*2 20Gb/s by c# code?

We have a device and a new PC both support USB 3.2 gen 2*2, the transfer speed is about 1GB per second, it's faster than USB 3.2 gen 2.I want to know how to distinguish it with USB 3.2 Gen 2, the difference is Gen 2 use single lane, and Gen 2*2 use double lane.But how to get the lane number? I checked the device property via USBTreeViewer, but there is no property to indicate the difference. Any one can give some tips? Thanks very much. C# is better, C++ code is also OK.

:)

 

Why is my USB 3.1 gen 2 adapter (USB C Female to USB A Male) causing bottlenecking?

I recently picked up an SSD and enclosure with a built in USB Cable. CrystalDiskMark shows a >500MB/s read speed and >400MB/s write speed with a direct USB C connection to a USB 3.1 gen 2 port, so all good here.

But I also picked up these adaptors from amazon.co.uk to ensure I could connect the drive to more common USB type A ports. These adapters noted that they could handle the 10Gbit speeds of USB 3.1 gen 2, although they do note that when this is the case the "other side" (Type A side) runs at USB 2 speeds. Out of a lack of options I decided to give them a go nonetheless and the claim is true. But it's not as simple as saying "these must really just be USB 2 adaptors with a blue finish".

When using the adapter to connect the drive to a front panel USB 3.1 gen 1 port connected to the USB 3 motherboard header, the speeds are ~300MB/s and 400MB/s read and write respectively. So the adapter can handle high throughput but just can't when used in gen 1 or 2 ports on the IO panel of the motherboard itself. Maybe this is a motherboard issue...

Edit: Just verified this across 2 Desktop systems:

• Rear Motherboard IO (USB 3.1 gen 1 and gen 2) with adapter: ~40BM/s
  R/W
  
• Rear Motherboard USB C with no adapter ~500MB/s R and ~400MB/s W
  (full speed)
  
• Front panel IO connected to motherboard USB 3 header (gen 1) with
  adapter ~200MB/s R ~400MB/s W
  

What am I missing here? I have found only one adapter available that clearly states it has 10Gbit ports at either end but it's pricey so any alternative suggestions are welcome. Notably, it has a significant rectangle shape at the USB C side, maybe this is part of the explanation...? See below:

 

Differences in Gen 2 and Gen 3

I got to thinking since my motherboard has two graphics card (16x) slots, but one is a Gen 2 and the other is a Gen 3, why can't I put my M2 SSD in the Gen 3 and my graphics card in the Gen 2. Wow what a differences in speed. Boot time is nothing now, downloads are simple a thing of the past when I did this. I've attached a picture of the differences between the Gen 2 and Gen 3 speed test.

 

USB 3.1 Gen 2 header

Another option would be a 3.1 gen 2 (10Gb) USB hub, which could be desktop mounted from the existing rear ports.
They aren't cheap though (yet).