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  1. Joined : May 2016
    Posts : 524
    Windows 10
       17 Oct 2016 #11

    Hi EdTittel,
    Thank you
    100=1000/10. So, I can not follow you about that 333Mbps. And USB2.0 is not the same as USB3.0/2. USB 2.0 =480Mbps and USB3.0=5000Mbps.
    Besides this, experimentally and defintivly USB 2.0 will not go further than 16MB/S=128Mbps
      My System SpecsSystem Spec

  2.    17 Oct 2016 #12

    I reported the figure from OOKLA speed test connecting to my nearest Time Warner server, and I stand by those numbers. As you say, the theoretical maximum for USB 2.0 is 480 Mbps which is the same as 60 MBps (or MB/s). It goes way faster than 16 MBps (or MB/s, if you prefer): I see that on USB drives all the time, and apparently also on the StarTech adapter I hooked up. I'm looking at the PC right now, and the GbE adapter is plugged into the USB 2.0 port for sure. I'm not sure where this gets us, but I wanted to be clear that these numbers are real and valid.
    Thanks,
    --Ed--

    PS: running a large file transfer from one GbE PC to another GbE PC just now, I was getting 110-115 MB/s (880-920 Mbps) on the network just now, between two machines on the same switch, both with jumbo packets turned on, so that's in line with untrammeled GbE network access. Shows that USB 2.0 is indeed slower than USB 3.0 or native GbE.
      My System SpecsSystem Spec


  3. Joined : May 2016
    Posts : 524
    Windows 10
       17 Oct 2016 #13

    Hi EdTittel,
    It is not my fault, it is this Chinese that sold me this crap. I just found out that the Laptop where I was testing, the USB 2.0 ports must be Half-Speed.
    I connected the external SSD to the USB 2.0 ports on the other Laptop and guess what: Transfer speed is 38MB/s!
      My System SpecsSystem Spec

  4.    17 Oct 2016 #14

    Thank goodness: you had me wondering if I'd been exaggerating USB capabilities all these years. There's probably something funky about the USB-to-PCIe bridge that connects USB to the computer's internal bus. I've seen this kind of thing on other low-budget tablets and low-end laptops before, now that you mention it...
    Not a good way to figure out your equipment is suboptimal, though. Hope you figure out a way to straighten things out. On my Lenovos, for example, I can get somewhere inbetween real USB 3.0 and USB 2.0 performance by using an adapter card that plugs into the PCIe slot in the notebook and that offers a pair of USB 3.0 ports to plug into. It cost about $30 and is another StarTech product (I buy them from Newegg) called 2 Port ExpressCard SuperSpeed USB 3.0 Card.
    HTH,
    --Ed--
      My System SpecsSystem Spec


  5. Joined : May 2016
    Posts : 524
    Windows 10
       17 Oct 2016 #15

    I am totally out of me, look at this and then the USB 2.0 is only Half-Speed!!!
    Attached Thumbnails Attached Thumbnails usb3.jpg  
      My System SpecsSystem Spec


  6. Joined : Aug 2014
    Forever West
    Posts : 2,374
    Win10 Home and Pro, Win7 Home, Linux Mint
       17 Oct 2016 #16

    jimbo45 said: View Post
    Hi there

    The fact that the Mobo already has built in USB 3 capability probably means the Bus speed is fast enough so your Pci-e card should be fine (although some of the cheaper ones only work at about 75% of true USB 3 speed --still a whole lot better than USB 2).

    If the initial Mobo didn't have USB 3 capability then it's a question of luck --might work at decent speed or might give you small improvement like 55 - 60 MB/s instead of around 35 MB/s (max) for USB 2.

    Incidentally also OT but some old laptop HDD 2.5 inch spinners often perform surprisingly well when connected to USB 2 or USB 3 slots via the appropriate SATA-->USB connector. So don't throw them away if you upgrade to SSD's - useful for backups etc. !!! and can be used attached to desktop computers too via same adapter cables.

    Cheers
    jimbo
    Guess I didn't make it clear that one motherboard came with built-in USB 3.0 and the other has the added card to gain the capability.
      My System SpecsSystem Spec

  7.    18 Oct 2016 #17

    EdTittel said: View Post
    These USB 3.0 adapters are generally backward compatible with USB 2.0. I just plugged in my StarTech USB 3.0 GbE adapter into one of my Lenovo notebooks (which have only USB 2.0 built in) and it fired up and worked immediately. Windows 10 knows how to find and install most of these drivers automatically, so they will work immediately following insertion in most cases.
    But of course, you'll be limited to the practical maximum for USB 2.0 when you use the network you attach to. Whereas my native GbE machines on my network get about 650 Mbps doing local file transfers, the best this USB 2.0 system will do is 333 Mbps. Still not terrible, though...
    HTH,
    --Ed--
    Hi there

    That's only a MAX of around 40 MB/s transfer --typically an average on USB2 you'd probably get an average of around 30 MB/s transfer -- quite slow when copying say 20 GB of multi-media files. Several minutes !!!.

    Over a network you are limited to LAN or Wifi speed -- if it's Wifi you'd probably be lucky to get a constant transfer speed of 11 - 12 MB/s (Mega BYTES / sec) whether you use USB 3 or USB 2 !!!!.

    I still find it strange that a laptop fitted with USB 3 capability on the Mobo only has USB 2 connections --unless the USB 3 mobo connectors are not really USB 3 !! I've seen a few mobo connections that look like USB 3 (have the blue colour) but are in fact USB 2. I've taken enough computers and cannibalized enough parts to know there's often strange things on a lot of Mobos.

    Cheers
    jimbo
      My System SpecsSystem Spec


  8. Joined : May 2016
    Posts : 524
    Windows 10
       18 Oct 2016 #18

    Hi,
    I have been doing some test about USB2.0 & 3.0 regarding to find out what is going on here.
    The Motherboard Chipset has USB 3.0, but the case Connectors are USB 2.0, they are black. I have also opened the case to see if there was 8 Lines to connector but there are only 4 , so no way to exchange connectors.
    My previous test was wrong, USB 2.0 are full speed, I was transferring the file to the internal SD-Card and Card / Adapter are "half-speed" or something else is slowing down the I/O speed.
    In both Laptops the USB 2.0 is very close to 40MB/s.
    And USB 3.0 is 300MB/s, probably behind the 400MB/s because SSD can not reach that speed.

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      My System SpecsSystem Spec


  9. Joined : Aug 2014
    Forever West
    Posts : 2,374
    Win10 Home and Pro, Win7 Home, Linux Mint
       18 Oct 2016 #19

    The connectors from the case ports to the motherboard are actually contain only 7 wires, the pins on the board are 7 with the plug having a blank area for indexing the plug. My motherboard manuals show USB 2.0 as HighSpeed and USB 3.0 as SuperSpeed. The USB symbol on my Notebooks that have USB 3.0 also have added SS letters to identify in addition to the blue centerpiece.
      My System SpecsSystem Spec


  10. Joined : May 2016
    Posts : 524
    Windows 10
       22 Oct 2016 #20

    I just got one LAN to USB adapter 10/100/1000Mbps and indeed the data transfer speed, in real world, is around 40MB/s, so about 320Mbps when adapter is connected to USB 2.0 Port. Not bad, much better than the 11MB/s of a 100Mbps LAN.
    Thank you EdTitel, you made me buy that adapter.
    @Berton: USB 2.0 has only 4 Wires, cables from Motherboard Headers with 8 wires are for 2 USB 2.0 ports. USB 3.0 has 8 wires (may be 7), i do not know it exactly and I do not need to.
    Look at an USB 3.0 Port you will see 8 connections, 4 in foreground (that are for USB 2.0) and 4 deep in connector, difficult to see.
      My System SpecsSystem Spec


 
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