Results 1 to 2 of 2

Thread: Why avoid USB NIC?

  1. #1
    Junior Member
    Join Date
    Jul 2017
    MN, USA

    Question Why avoid USB NIC?

    Recently I spent over a week researching my new network solutions: router & NIC.

    That entire time I only ever found statements along the lines of "It technically doesn't matter. They perform equally." regarding PCI vs USB NICs.

    Now that I've discovered this wonderful forum through this article, I'm much more concerned.

    Does anyone have any evidence or facts to prove why USB NICs should be avoided as the article claims?

  2. #2
    Administrator Philip's Avatar
    Join Date
    May 1999
    Jacksonville, Florida, United States
    Blog Entries
    The USB interface works by "polling" interrupts, instead of generating them. The drivers create a "virtual" software network adapter that polls the USB interface periodically. Cheap USB dongles do a lot of processing/polling in that driver software, introducing noticeable issues, especially if the throughput is higher, or the CPU is fully utilized. The interface also has some speed limitations, especially USB 2.0 ports.
    All that causes increased latency, decreased throughput, and possible periodic disconnects.

    It should not be noticeable with newer USB 3 ports, better USB NICs, and faster computers that are not CPU-bound. However, it is not the best interface for gaming, where latency and throughput are important, and the computer is under load.

    If you are using a newer laptop, your only options for wired Ethernet will go through USB these days, so newer drivers are generally better.

    I hope this helps

Similar Threads

  1. Avoid Screen Pop ups
    By Weasley in forum
    Replies: 0
    Last Post: 12-14-09, 07:33 AM
  2. A hoster to avoid!
    By Shagster in forum General Broadband Forum
    Replies: 1
    Last Post: 08-05-07, 05:37 PM
  3. How To Avoid The Flu
    By blacklab in forum General Discussion Board
    Replies: 3
    Last Post: 01-26-06, 05:06 AM
  4. How to Avoid the Flu
    By blacklab in forum General Discussion Board
    Replies: 5
    Last Post: 11-05-04, 01:03 AM
  5. Avoid PayPal
    By Mr White in forum General Discussion Board
    Replies: 17
    Last Post: 12-14-02, 09:10 AM


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts