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  1.    12 Mar 2017 #1
    Join Date : Oct 2015
    Posts : 24
    Windows 10 Pro

    USB 3.0 card reader fall back to USB 2.0 speed on windows 10


    I have 2 desktops (with completely different configurations) and 2 USB3.0 card readers - Lexar Professional and Transcend card readers, paired with Lexar 1000x SD card.

    The weird problem is that sometimes, the transfer of my RAW images will dip to usb2.0 speeds (around 30+MB/s). Sometimes, it takes a restart. other times, it takes an eject and re-plugging in to get back the USB 3.0 speeds. It happens on both card readers, and on either desktop - so I'm thinking it must be an OS related issue.

    There are no special drivers required (none provided also if you're on win 10) and it's automatically installed by Win 10.

    In addition, it happens regardless of whether it's on Intel's native usb3.0 ports or the 3rd party controller.

    Has anyone else had that issue? How did it get resolved?

    here's the normal speed it should hit with my card/reader combo:

      My ComputerSystem Spec
  2.    12 Mar 2017 #2
    Join Date : Aug 2014
    Forever West
    Posts : 3,922
    Win10 Home and Pro, Win10 Insider Preview, Win7 Home, Linux Mint

    Haven't seen the same exact issue as yours but generally I find using a Self-Powered USB 3.0 Hub plugged into USB 3.0 ports on a computer to be the most reliable rather than relying upon the computer's ports to provide sufficient power and maintaining that constant power. For working with my clients I keep both Self-Powered USB 2.0 and USB 3.0 Hubs. In theory and most practical use USB 3.0 ports can fall back to providing USB 2.0 function. However, some older Thumb drives may not work in USB 3.0 ports as well as some older printers, etc.
      My ComputerSystem Spec
  3.    12 Mar 2017 #3
    Join Date : Oct 2015
    Posts : 24
    Windows 10 Pro
    Thread Starter

    Quote Originally Posted by Berton View Post
    Haven't seen the same exact issue as yours but generally I find using a Self-Powered USB 3.0 Hub plugged into USB 3.0 ports on a computer to be the most reliable rather than relying upon the computer's ports to provide sufficient power and maintaining that constant power. For working with my clients I keep both Self-Powered USB 2.0 and USB 3.0 Hubs. In theory and most practical use USB 3.0 ports can fall back to providing USB 2.0 function. However, some older Thumb drives may not work in USB 3.0 ports as well as some older printers, etc.
    theoretically speaking, shouldn't the motherboard's built-in USB ports be more reliable compared to self-powered USB hubs since there is no "intermediary" per-se? power shouldn't be an issue since it will tap on the PSU directly (and I have no lack of it, using a 850w seasonic)
      My ComputerSystem Spec
  4.    13 Mar 2017 #4
    Join Date : Feb 2016
    Phoenix, AZ
    Posts : 243
    Windows 10 Pro 1709 16299.19

    Since you didn't state the card reader model #'s and your system specs show nothing, We don't know your configuration. We need to have detail info on those items (ie: Mother board Manufacture and model number, etc) before we can really try to help you.
      My ComputersSystem Spec
  5.    13 Mar 2017 #5
    Join Date : Oct 2013
    Posts : 343
    Windows 10 Pro x64, Windows 7 Ultimate x64 SP1, Windows 8.1 Pro x64

    Quote Originally Posted by tententwenty View Post
    power shouldn't be an issue since it will tap on the PSU directly (and I have no lack of it, using a 850w seasonic)
    Each type USB port has its own power limitation and it is not a function of the size of the power supply.
      My ComputerSystem Spec
  6.    13 Mar 2017 #6
    Join Date : Oct 2015
    Posts : 2,037
    Windows 10 Pro X64

    Quote Originally Posted by tententwenty View Post

    - so I'm thinking it must be an OS related issue
    I'm pretty certain it is an OS issue but I don't think there's anything you can do about it short of hacking the registry every time you plug in something into a USB 3 port.

    Cheers,
      My ComputersSystem Spec
  7.    13 Mar 2017 #7
    Join Date : Aug 2014
    Forever West
    Posts : 3,922
    Win10 Home and Pro, Win10 Insider Preview, Win7 Home, Linux Mint

    I'm pretty certain it is an OS issue but I don't think there's anything you can do about it short of hacking the registry every time you plug in something into a USB 3 port.
    Could be but keep in mind that most BIOSes support USB 2.0 natively [Legacy] while USB 3.0 needs drivers loading with Windows to get the support.
      My ComputerSystem Spec
  8.    13 Mar 2017 #8
    Join Date : Oct 2015
    Posts : 2,037
    Windows 10 Pro X64

    Hi,

    Quote Originally Posted by Berton View Post
    Could be but keep in mind that most BIOSes support USB 2.0 natively [Legacy] while USB 3.0 needs drivers loading with Windows to get the support.
    Sure.

    Never boot up with a USB 3.0 device plugged in as Windows may flag it as USB 2.0 capable most of the time but not necessarily recognize it as USB 3.0 capable.

    Never plug a USB 2.0 device into a USB 3.0 port either as there's a good chance that when a USB 3.0 device is plugged in later it will run at USB 2.0 speed.

    W10 gets easily confused when it comes to USB 3.0 devices and when in doubt it will use USB 2.0 speed to be safe.

    A good free little tool to see what's going on is USBTreeView by Uwe Sieber.

    Cheers,
      My ComputersSystem Spec
  9.    14 Mar 2017 #9
    Join Date : Feb 2016
    Phoenix, AZ
    Posts : 243
    Windows 10 Pro 1709 16299.19

    Quote Originally Posted by fdegrove View Post
    Hi,



    Sure.

    Never boot up with a USB 3.0 device plugged in as Windows may flag it as USB 2.0 capable most of the time but not necessarily recognize it as USB 3.0 capable.

    Never plug a USB 2.0 device into a USB 3.0 port either as there's a good chance that when a USB 3.0 device is plugged in later it will run at USB 2.0 speed.

    W10 gets easily confused when it comes to USB 3.0 devices and when in doubt it will use USB 2.0 speed to be safe.

    A good free little tool to see what's going on is USBTreeView by Uwe Sieber.

    Cheers,
    This all depends on the Mother board that is in use. My new PC that is a Gigabyte MB, has native USB 3.0/3.1 support. I didn't have to download any drivers after installing W10.

    And as far as plugging A USB 2.0 device in into a USB 3.0 port, it really makes no difference. The device controls the speed of the Port (not the software). Your statement " Never plug a USB 2.0 device into a USB 3.0 port either as there's a good chance that when a USB 3.0 device is plugged in later it will run at USB 2.0 speed " I have never seen that condition ! And as far as Windows 10 getting confused and using USB 2.0 is another fallacy. I've watched all of my 3.0 ports off and on with "USBVIEW", and have never seen that problem !

    But thanks for the info on "USBTreeView" by far a better tool than USBVIEW !

    I just wish the OP would post his configuration so that we can address his problem !

    Below is a USB3.0 to USB 3.1 perfomance copying files via File Explorer
    Attached Thumbnails Attached Thumbnails image.png  
      My ComputersSystem Spec
  10.    15 Mar 2017 #10
    Join Date : Oct 2015
    Posts : 24
    Windows 10 Pro
    Thread Starter

    Hi guys,

    as to the Os getting confused, can I do anything to sort things out?

    Here are my specifications:

    Intel i5-2500k 3.3Ghz @ 4.7Ghz (1.4v) & CoolerMaster V6 Air Cooler
    Gigabyte Z77-D3H v1.0
    4 x 4Gb DDR1600 in Dual Channel
    Gigabyte GTX1060 1Gb (Monitor running @ 4k resolution)
    2 x 512Gb Samsung 850 Evo SSDs (1 for OS/Programs, 1 for
    Footage)2 x 3Tb Seagate 7200rpm HDDs (Exported & Archived Media)
      My ComputerSystem Spec

 
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