Slow interent

Discussion in 'iMac' started by Arfus, Nov 18, 2010.

  1. Arfus macrumors member

    Aug 11, 2010
    Hey! I got a issue my internet is so slow it downloads iat 1.5mbps but i have 30/30 from my ISP. what to do? its connected straight to the Router from my ISP. I dont have a WI-FI ROuter. I do but i dont use it yet. just got it.

  2. Spike88 macrumors 6502a

    Jan 25, 2010
    Hi there...

    Sounds like your iMac and your Router are connected via UTP (wired) connection.

    With above in mind, Run Speed Test ( ) and tell us its download and upload numbers. When doing this test, do pick your nearest City (on their map). For example, New York City - if that's your nearst available location.

    Also... Tell us when your iMac has slow communications. For example, when doing emails back/forth, only when surfing, only when downloading a file, only while watching YouTube Movies, etc. etc.??? This will help us diagnose the slow communications as well....


  3. Arfus thread starter macrumors member

    Aug 11, 2010
    Its ben the same on both my imacs i have two just got a new one today. No change. its when i download files from diffrent sites its on about 1.4mb/s all the time. Also some streaming video mostly in 720P and more it wont load properly before i`v watched to the point it hasent continued loading.

    Its connected straight to my imac from the wall the routher thing i got from my ISP Its not a wireless router.


    11.6Mb/s Down and

    11.24Mb/s up

    Sorry i ment Mb/s not Mbps

    Sorry for bad spelling.

  4. Spike88 macrumors 6502a

    Jan 25, 2010
    I find it interesting that lots of Mac experts on this forum and no others are willing to help you. Very interesting...

    Is "11.6M bps Down and 11.24 Mbps up" within reason of your ISP B/W Service?


    As a few suggestions, try:

    a - Ensure you are using CAT-5 Ethernet cable. Meaining, new cable - not an old cable laying around or purchased from Flea Market.

    b - Access your iMac's Preferences - Network and configure with NO IPV6. Having both IPV4 and IPV6 at the same time can cause slowness. By default, Apple enables both. Turn IPV4 ON and IPV6 Off.

    c - Within iMac's Preferences - Network, configure your Ethernet with fixed values. For example, Full Duplex, 100 Mbps. If wondering, some routers have difficulties "synching" with their end devices. Using Fixed (static) values makes them synchronized.

    d - Within iMac's Preferences - Network, configure with fixed DNS Entires. This will help "speed up" communications as well. re: NS Entries as &

    Try these changes for a few days. Let us know the results after these changes.

    If wondering, more "configurations" can be done. The above are only the basics.

    Good luck....

  5. Arfus thread starter macrumors member

    Aug 11, 2010

    I got a thing cable thats a coupel of years old

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