NETGEAR is aware of a growing number of phone and online scams. To learn how to stay safe click here.
Forum Discussion
Nighthawk CM1150V cannot get expected speed
Xfinity increased my speed to 800 Megabits (download), however when I am directly connected to the modem (by passing my router), and at best, I am only getting 400 Megabits. This was the 3rd party modem that Xfinity recommended which also has phone support. I have made sure that I am running the current version of the BIOS. Xfinity came out with a meter and claims that when the plug my cable into their device (before the modem) they are seeing the expected full speed. Of course, Xfinity won't do much else to support, since I did not pay the high-price to rent their modem. Xfinity thought that it might be a limitation with my laptop, however my Dell Latitude 5520 laptop is only a year old, and can well support more that 1 GB speeds! So I am lost on what else to try, and would appreciate any assistance for the experts in this community. I have also made sure that I my VPN is not running, when running speed tests.
8 Replies
rsherma wrote:Xfinity increased my speed to 800 Megabits (download), however when I am directly connected to the modem (by passing my router), and at best, I am only getting 400 Megabits. This was the 3rd party modem that Xfinity recommended which also has phone support. I have made sure that I am running the current version of the BIOS. Xfinity came out with a meter and claims that when the plug my cable into their device (before the modem) they are seeing the expected full speed. Of course, Xfinity won't do much else to support, since I did not pay the high-price to rent their modem. Xfinity thought that it might be a limitation with my laptop, however my Dell Latitude 5520 laptop is only a year old, and can well support more that 1 GB speeds! So I am lost on what else to try, and would appreciate any assistance for the experts in this community. I have also made sure that I my VPN is not running, when running speed tests.
A couple of things to clarify. When you say current version of the BIOS, I presume you are talking about your Dell 5520 laptop computer. Please confirm. When you state your Dell 5520 can well support well more than 1 Gbps speeds you are in error. At most it can support around 940-950 Mbps.
On your Dell 5520, recommend you go to the Dell support site and confirm you are using the most recent Dell supported driver for your Ethernet adapter.
It would not hurt to log into your CM1150V and check the cable firmware version and compare it to the appropriate listing here:
You want to make certain the Ethernet cable you are using to connect between your laptop and modem is in good condition and type Cat 5e or better, Cat 6 is recommended.
Get through these steps and then there are some other things we can check on your power levels and event logs.
Thanks very much for your reply. I am using cat 5e cable. Very interesting about Dell not using a 10/100/1000 port on their newer machines. I have double checked my Dell and Modem drivers to make sure they are current. I will try buying a USB to Ethernet adapter and see if that improves speed at all. I will provide an update after trying this.
rsherma wrote:Thanks very much for your reply. I am using cat 5e cable. Very interesting about Dell not using a 10/100/1000 port on their newer machines. I have double checked my Dell and Modem drivers to make sure they are current. I will try buying a USB to Ethernet adapter and see if that improves speed at all. I will provide an update after trying this.
Not what I said! If your computer is equipped with a 10/100/1000 Mbps rated port, the most your are going to get through it in real life is around 940-950 Mbps. The reason is the ports run at about 94-95% efficiency, thus the max throughput in the 940-950 Mbps range.
Do you have a screensnip of the cable connections page and the event logs?
Did you try having xfinity re-provision it? I've had the wrong speed provisioning sent before.
Did you try a different device?
Or different website/browser?
Yes, I had Comcast check the provisioning speed of my service.
Just curious if you know of an affordable device that would do a reliable speed check of what is really coming into the modem versus using speedtest over a computer, that has the identified speed limitation issues in the built-in Ethernet port?
rsherma wrote:Yes, I had Comcast check the provisioning speed of my service.
Just curious if you know of an affordable device that would do a reliable speed check of what is really coming into the modem versus using speedtest over a computer, that has the identified speed limitation issues in the built-in Ethernet port?
I do not know what router you are using. Unless you have a router that can be configured to support link aggregation out of your modem, you have the same 1000 Mbps limitation on the output port on your modem.
