It is necessary for you to install the USB 3.0 driver provided by Dell. If USB performance issues continue I suggest you checking this with Dell directly.
I have the same problem with my Life-book notebook.
Some times the USB 3.0 ports will run in USB 2.1 Protocol and some times they will run in USB 3.0 protocol
I am trying very hard to figure out what is the reason behind this. I have 3 USB 3.0 ports and 2 of them will run in 2.1 protocol and one will work in 3.0 protocol but the usb mass storage will always show up in the xHCI controller on on my USBVIEW.exe program.
The xHCI controller is the USB 3.0 controller. You can see what devices run on the controller in USBVIEW.exe to make sure they are running on the correct USB 3.0 controller.
The problem is, they are running at USB 2.1 protocol and not USB 3.0 protocol.
If I change operating systems, the same problem happens. This is very odd. I wish I knew what was causing my USB 3.0 port to run these USB 3.0 devices as USB 2.1 protocol and not USB 3.0 protocol.
By the way I am running INTEL 7 series C216 chip-set USB controllers and intel xHCI controllers.
I use chipgenius to see the USB protocol version when the USB 3.0 is running slow and I use USBVIEW to see what controller the USB mass storage is working with.
The USB 3.0 ports seem to change quite often what protocol they run my USB 3.0 USB drives at. Sometimes they all run protocol 2.1 and its slow. Some some of them run 2.1 and some run 3.0. Sometime they all work.
I wish I could get them to run USB 3.0 protocol all the time.
The controller seems to be switching between 2.1 and 3.0 and I have no idea why or how to control it.
There are some computers that by default have an option in the BIOS that allows the user to change the USB 3.0 to always work as xHCI or eHCI. Check in the BIOS if your motherboard has this option.
no my bios only says enable usb 3.0 and enable usb legacy
I am sorry to hear that. I think you should contact the Computer Manufacture at this point and report this situation for them to maybe develop a BIOS update.
Fujitsu said get a new driver update from Intel.
I told them Intel has no drivers for windows 8 / 8.1 usb 3.0
they dont reply to me any more. I asked for new bios many times before I wrote this post.
The USB 3.0 driver is preloaded on Windows 8 and 8.1 so there is no need to get a driver and possible updates for this are developed by Microsoft with their Windows Updates.
Well I bought a few 3.0 hubs today and when I use my 3.0 flash drives on these hubs, my usb 3.0 drives will run fast at 3.0 speeds protocol 3.0
so I believe the xHCI Hub is the problem not the bios or usb 3.0 xHCI controller
Maybe intel can do a driver update to fix the problem with the xHCI hub running protocol 2.1 instead of 3.0
I will send this feedback to the corresponding department.
How do you check if the ports have been updated with the correct drivers please? and if they haven't, where do you go from there?
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do you know how to open DEVICE MANAGER
In device manager; you click the device you want to check and click the DRIVER tab
the driver date and version are in that page. make sure it matches the driver version and date you installed