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imylee16's avatar
imylee16
Follower
Mar 12, 2020

Nighthawk Modem Router Combo Not Close to 1000mbps

Hi all. I recently purchased a Nighthawk C7800/AC3200 modem router combo to use with Comcast Xfinity wifi. I'm supposed to be getting up to 1000 mbps but after multiple speed tests right next to the router, the max I've seen is 285 mbps. I've already contacted Comcast support and went through all their troubleshooting steps. They are insistent that it is the modem that is causing the issue. I've also tried changing the router channel and no luck. 

I wouldn't be trying this hard if I was at least getting 600 - 800 mbps. But I'm not even close to that right now. Any advice or suggestions on troubleshooting this? Thanks!

2 Replies

  • plemans's avatar
    plemans
    Guru - Experienced User

    1. How are you testing? wired/wireless? Make sure to test over a wired connection. make sure you're getting full speed wired. So what speed do you get over a wired connection

    2. What website are you testing on? 

    3. What device are you testing with? 

    4. If you log into the c7800 modem connections page, take a screen snip of your modem connections. Comcast is great at saying a line is fine when its not. 

  • FURRYe38's avatar
    FURRYe38
    Guru - Experienced User

    That max speed rate you will never see with the C7800 maybe around 400-500Mbps, however this also depends on your wireless device design and support. You may see less with wireless. 
    You should see near 900Mbps with a wired LAN cable PC though. 


    imylee16 wrote:

    Hi all. I recently purchased a Nighthawk C7800/AC3200 modem router combo to use with Comcast Xfinity wifi. I'm supposed to be getting up to 1000 mbps but after multiple speed tests right next to the router, the max I've seen is 285 mbps. I've already contacted Comcast support and went through all their troubleshooting steps. They are insistent that it is the modem that is causing the issue. I've also tried changing the router channel and no luck. 

    I wouldn't be trying this hard if I was at least getting 600 - 800 mbps. But I'm not even close to that right now. Any advice or suggestions on troubleshooting this? Thanks!