Your device can perform faster when you connect it to a usb3 device

[dfalir1]

Hi all,

i need your advise pls.

I have a Samsung series 7 laptop with 2 usb3 ports and 2 usb 2.0 ports. On the device manager i can see the installed driver Intel usb 3.0 root hub and intel usb 3.0 extensive host controller.

I also have purchased a Samsung 64GB sdxc card SDXC UHS (I), that according to manufacturer it can reach speeds "Transfer Speed: Up to 80 MB/s Read and up to 40 MB/s Write". I have enclosed this in a USPEED USB3 card reader, so that I use this as a 64Gb usb3 flash drive.

My problem is that everytime I connet this flash drive to my laptop's usb 3 ports, I get the message "This device can perform faster if you connect it to a superspeed usb 3 port" (!!) so I dont get it! What is wrong??

Actual writing speeds, when i copy large files (eg movie) this is done at 28 - 30 MB/s while speeds when copying many small files (folder with many smaller images) is done at 10 - 11.5 Mb/s.

I also have a usb 3.0 Seagate hard drive but I dont see this message everytime I connect it. Also, the exact same test (with the exact same files beeing transferred) are: Large files (eg movie) at 90 - 95 MB/s while smaller files (folder with many smaller images) is done at 34 - 37.5 Mb/s

I know that the Samsung SD card can't achieve the same speeds, but I am mostly curious why this message comes up "This device can perform faster if you connect it to a superspeed usb 3 port" . Is my flash drive operating at usb 3.0?

Thank you for your help
Dionisis

 

[Britton30]

Hi Dionisis , I have a couple of USB 3.0 flash sticks that give me the same message even though I have them in a USB 3.0 port.
In your case it may be due to the fact that an SDXC card isn't really a USB device, I'm not sure on this. someone else may have a better explanation.

You can run comparisons using the same files and copying in the 2.0 and the 3.0 ports to see any difference.

 

[dfalir1]

Hi Britton and thank you for your answer.

I did make a test with the same files while having the flash disk connected to a usb 2.0 port on the same Laptop and this time the writing speed of the large files was at 24 Mb/sec (vs 28-30 usb 3.0) and the smaller files had 9-10Mb/s (vs 10 - 11.5 Mb/s usb 3.0). Do you think this proves what you say? is this the case?

 

[Britton30]

My tests with the flash stick were similar so I suspect it's ok and mainly a limitation of the SDXC card whitch are generally rated as xx Speed or Class xx.

USB 2 has a theoretical throughput of 35MB/s and USB 3 400MB/s, my devices got nowhere near that speed. They do work faster in the USB 3 ports though.

I never figured out why I got the same stupid warning like you did.

 

[seven8]

hi TS, sorry to hijack your thread but i'm facing a similar problem as well.

on win 8.1 pro and most updated intel usb3.0 drivers (mobo= asrock z77 pro 3), but my seagate usb3.0 1TB drive always gets this message when connected to a usb3 port..

any help or advice would be very much appreciated!