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solarissf's avatar
solarissf
Aspirant
Oct 08, 2020

speed directly from modem half what it should be. cm1150v

I currently pay for 600mb download speed and when I run speed tests from a computer hardwired directly into modem I am only getting around 250-275mb on xfinity speedtest.  I called xfinity and they tested the coax cable and say the house is getting 1.2gb, so they are blaming my modem.  The techs advice was to register the modem, (which I did), and that will unlock the speed.  he was wrong.  he then said there must be some setting on the model throttling the speed.  does anyone have any suggestions as to why I am getting half the speed I should be, directly in modem, hardwired?

 

thanks!

7 Replies

  • FURRYe38's avatar
    FURRYe38
    Guru - Experienced User
    Oct 08, 2020

    Have the ISP check the signal and line quality UP to the modem. Make sure the ISP has provisioned the modem correctly.
    Be sure there are no coax cable line splitters in the between the modem and ISP service box. 
    Be sure your using good quality RG6 coax cable up to the modem. 
    Be sure to power OFF the modem for 1 minute them back ON.
    https://community.netgear.com/t5/Cable-Modems-Routers/General-info-and-Troubleshooting-for-Cable-Modems/m-p/1530376#M12853

    • solarissf's avatar
      solarissf
      Aspirant
      Oct 08, 2020

      hi.

      isp checked the signal and line both remotely and they came into my house and tested.  they all say inside my house on their hand help device via coax I am getting 1.2gb into house.  we did the whole unplug modem thing at least 5 times now.  when I plug in a laptop into that modem the speed is around 250-275mb.

      • FURRYe38's avatar
        FURRYe38
        Guru - Experienced User
        Oct 08, 2020

        Be sure your using a good quality LAN cable between the PC and modem. CAT6 is recommended. 

        Try a different PC to compare results as well. 

        Reboot your PC and speed test again. Use Ooklas installable speed test app for Windows and Mac. 

        Be sure all background running applications and security programs are disabled prior to speed testing on the PC.