Hi All, I have a 600mbps Internet only plan from Xfinity/Comcast.I purchased a Netgear C7000v2 Modem Router (AC1900) to replace my old router + modem setup.The New Netgear C7000v2 Modem Router is able to go past 600mbps over wired connection but it can't go past 270mbps over 5GHz wifi network. The Netgear is capable of 1.3gbps over 5GHz network.My old router (AC1900) + Arris Modem setup was able to deliver speeds upto 400mbps on 5GHz wifi network and full 600mbps over wired conection. If I connect the Old router to the New Netger Model router, the old Router is still able to give 350mbps+ speeds on 5GHz wifi Network. I have tried the following troubleshoot methods already and none worked.1. Factory Reset the Modem Router.2. Changed 5GHz Channel to 161.3. Changed CTS/RTS Threshold from 2345 to 2304.4. Changed DNS Address to Primary DNS:8.8.8.8 & Secondary DNS: 8.8.4.45. Changed MTU size from 1500 to 1492.6. Power cycled the modem router.7. Observed the connection for 24 hours.8. Firmware version is v1.03.03 (Latest). I asked Xfinity support to reflash the firmware (Since the firmware is provider managed) but they were not sure how to do it.QuestionsWhat are my options?Am I eligible for a Brand New Replacment if this can't be fixed?Did aybody else face similar problems and what was the fix?

What wireless devices are you using to speed test with? What connection rates are you seeing with these devices connected to the 5Ghz radio? Depending upon devices and connection rates, most devices max out at around 300-500Mpbs depending upon there support and design. Not all wifi devices can speed test beyond these speeds on 5Ghz. 1x1 or 2x2 antenna supporting devices is a factor. 4x4 devices can support higher speeds.

Is Armor, Access controls or Traffic Meter enabled? Has a factory reset and setup from scratch been performed? Turn OFF or disable 2.4Ghz and leave 5Ghz running only. Ensure no other devices are connected to the 5ghz radio. Set channel to 48. Set highest connect mode on the 5Ghz radio. Set WPA2 and AES only. Be sure to turn OFF the other wifi router.

I doubt you'll see more than 300mbps over 5ghz with the C7000. The C7000 is roughly a R7000 but is a combo device meaning it has a modem as well. the R7000 would get over 300mbps but not a whole lot more. And it had its full power budget for just the router portion. The C7000 had to split its power/processing budget between both the modem and the router side. This means its not going to have the same performance as the r7000 because its a combo device. Its one of the reasons we recommend seperate modems from routers besides some of the other reasons why we recommend avoiding them.

rohitruls wrote: But in the specifications the Router is rated at 1.3gbps oer 5GHz. So shouldn't it atleast be able to go upto 600mbps with ease? I might have to go back to my old setup if this netgear router modem isn't able to deliver the speeds its rated for. I wish it were that simple. Speed specs are very over rated and greatly depend on your device. I highly recommend reading a little bit here: Understand Wi-Fi 4/5/6/6E (802.11 n/ac/ax) (duckware.com) It goes over the misunderstandings of wifi. Its very well written and pretty easy to understand. And, like I said, you have to keep in mind, a combo device isn't going to have the same performance as a unit dedicated to run as a single device (with similar specs). Same as a drag car is going to beat a street/strip car in a race. One is designed for a dedicated function while the other has to split functions with its resounces.

Thank you for your response. I am using both my Laptop as well as Samsung Galaxy Note 10+ device to check the speeds on www.Speedtest.net and www.Fast.com. When connected to the old router's 5GHz network (which is plugged into the Netgear Router Modem's gigabit port) I am getting over 370mbps download speed on both laptop as well as cellphone (when checked on the sites mentioned above). When I connect to the Netgear 5GHz network, the download speeds drop down under 200mbps.

Netgear C7000v2 Modem Router - Slow Internet speed over 5GHz wifi network

12 Replies

FURRYe38
Guru - Experienced User
Oct 26, 2021
What wireless devices are you using to speed test with?

What connection rates are you seeing with these devices connected to the 5Ghz radio?

Depending upon devices and connection rates, most devices max out at around 300-500Mpbs depending upon there support and design. Not all wifi devices can speed test beyond these speeds on 5Ghz. 1x1 or 2x2 antenna supporting devices is a factor. 4x4 devices can support higher speeds.
- rohitruls
  Aspirant
  Oct 26, 2021
  Thank you for your response.
  
  I am using both my Laptop as well as Samsung Galaxy Note 10+ device to check the speeds on www.Speedtest.net and www.Fast.com.
  
  When connected to the old router's 5GHz network (which is plugged into the Netgear Router Modem's gigabit port) I am getting over 370mbps download speed on both laptop as well as cellphone (when checked on the sites mentioned above). When I connect to the Netgear 5GHz network, the download speeds drop down under 200mbps.
  - FURRYe38
    Guru - Experienced User
    Oct 26, 2021
    Is Armor, Access controls or Traffic Meter enabled?
    
    Has a factory reset and setup from scratch been performed?
    
    Turn OFF or disable 2.4Ghz and leave 5Ghz running only. Ensure no other devices are connected to the 5ghz radio.
    
    Set channel to 48. Set highest connect mode on the 5Ghz radio. Set WPA2 and AES only.
    
    Be sure to turn OFF the other wifi router.
dan305
Tutor
Mar 07, 2022
Rohitruls have you found a solution ? I have the same issue i used to have 400 mbps plan and would get 400 mbps or close all the time. xfinity upgraded to 600 and after that upgrade
rohitruls wrote:
Hi All,

I have a 600mbps Internet only plan from Xfinity/Comcast.
I purchased a Netgear C7000v2 Modem Router (AC1900) to replace my old router + modem setup.
The New Netgear C7000v2 Modem Router is able to go past 600mbps over wired connection but it can't go past 270mbps over 5GHz wifi network. The Netgear is capable of 1.3gbps over 5GHz network.
My old router (AC1900) + Arris Modem setup was able to deliver speeds upto 400mbps on 5GHz wifi network and full 600mbps over wired conection. If I connect the Old router to the New Netger Model router, the old Router is still able to give 350mbps+ speeds on 5GHz wifi Network.

I have tried the following troubleshoot methods already and none worked.
1. Factory Reset the Modem Router.
2. Changed 5GHz Channel to 161.
3. Changed CTS/RTS Threshold from 2345 to 2304.
4. Changed DNS Address to Primary DNS:8.8.8.8 & Secondary DNS: 8.8.4.4
5. Changed MTU size from 1500 to 1492.
6. Power cycled the modem router.
7. Observed the connection for 24 hours.
8. Firmware version is v1.03.03 (Latest). I asked Xfinity support to reflash the firmware (Since the firmware is provider managed) but they were not sure how to do it.

Questions
What are my options?
Am I eligible for a Brand New Replacment if this can't be fixed?
Did aybody else face similar problems and what was the fix?

im only getting 275 mbps. If you have found a solution please let me know. My email is eoreda3@aol.com or you can post it here.

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Netgear C7000v2 Modem Router - Slow Internet speed over 5GHz wifi network