Question USB adapters and external cables

[tablespoon]

Hello, on Amazon there are many USB adapters and cables. If they are rated at 10Gbps but using them caused the reading and writing speeds to drop a lot (e.g. reading speeds dropped to 1/2 to 1/10 of the original speeds), does that mean false advertisement? Do we expect a slight drop in speeds or almost the same speeds as direct connection from the USB flash drive to the PC?

 

[ella2000]

It doesn't necessarily mean that it's a false advertisement. There are few other factors that affects data transfer speed.

 

[tablespoon]

Adding a cable in between USB storage and a PC dropped the performance. What could be the other factors?

 

[mxnerd]

Show the performance number before and after adding the cable, on the same port. usb ports could have different speed.

Which cable you bought and the product link. Besides, don't confuse usb cable and usb hub.

 

[tablespoon]

I tried:

Poyiccot USB-C to USB 3.1 Adapter 10Gbps USBC Female to USB A Male Adapter Cable (ASIN B0BNHYGQM7)

Poyiccot Short USB 3.0 Extension Cable 4inch Flat USB Extension Cable USA A to USB A Female 10Gbps USB 3.1 Extender Cable (ASIN B0BTRW3NW6)

Tired on Type C flash drives. Both of them caused drop in performance. One of them caused drop in sequential read by 10 times. Don't remember which one nor have the numbers as I returned them.

I will not buy from Poyiccot anymore. Given that there are so many unknown brands selling these products and some of them claim their products to be capable of 10Gbps but they aren't. So one has to try several products and hope for the best?

 

[mxnerd]

Blame the internet. Nowadays everyone/anyone can be a seller/vendor, can create store/brand and then disappear in a month.

A lot of vendors don't do QC at all because it takes a lot of time and just let customers do the job.

It is what it is.

 

[tablespoon]

Very true! The internet 30+ years ago is much better.

Anybody knows any good angled adapter or flexible cable that can do 10Gbps?

 

[mikeymikec]

Aside from legacy devices like USB floppy/CD/DVD drives, USB flash drives are the slowest type of USB storage you can find. I wouldn't ever expect one to be used to properly showcase USB performance.

A particularly expensive USB SSD or a decent NVMe SSD connected via a decent NVMe drive enclosure (which is rated for the speeds you're hoping for) is what you would need to use if you wanted to properly test out the bus / cables.

After you've picked out ideal hardware for the test, then you need to set up the most ideal software for the test because for example copying a legion of ~4KB files is not going to saturate the bus.

Still, you're hoping to see ~1.25 gigabytes per second throughput and by the sounds of things you're hoping to see it for more than an instant in time. For this kind of expectation I would wait until internal SSDs can push that without even breaking a sweat, IMO we're 5-10 years away from that.