Will I get full speed of USB3 using PCi 2 slot?

Hi I have purchased a USB 3 Pci2 card.

What I want to know is will I get the full speed of USB 3 with PCi2?

Will I have any bottlenecks and what is the max throughput of PCi2?

Thanks
2 answers Last reply
More about will full speed usb3 slot
  1. You will be media limited far before you saturate the pipeline of a PCIe 2.0 bus.
  2. A single x1 PCI-E 2.0 lane oscillates at 5 GHz, and
    each byte has one extra start bit and one extra stop bit,
    in addition to 8 data bits, OR 10 bits per byte.

    Thus, 5 GHz / 10 = 500 Megabytes per second
    in each direction (max bandwidth) per PCIe 2.0 lane.

    USB 3.0 is 10 TIMES the speed of USB 2.0,
    or 10 x 480 Megabits per second = 4.8 Gb/sec.

    http://www.everythingusb.com/superspeed-usb.html

    Again, each transmitted byte has a start and stop bit + 8 data bits.

    Thus, 4.8 Gbps / 10 = 480 Megabytes per second.

    So, the limiting factor is the USB 3.0 bandwidth (480)
    not the PCI-E 2.0 bandwidth (500).

    Of course, controller efficiency is a factor too,
    but no controller can exceed the rated max bandwidth.


    Hope this helps.


    MRFS
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