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Not Getting the 100Mbps Upload Speed With My CAX80 Modem Router
I am on the 1000 Mbps download and 100 Mbps upload plan and my download speeds are close to 950 Mbps but my upload speeds are only 20 Mbps. I see some people have this problem but forum suggested to start your own thread which creates a new ticket for the problem. I am running on a CAX80 gateway but every time I ran speed test it always registered to around 20 Mbps upload speed and never even got close to 100 Mbps. So how can I fix this issue?
BruceW
Gold Problem Solver
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26.3K Messages
1 year ago
The CAX80 is not approved for the new upload speeds. Realize that although Comcast calls some devices "Approved" and some "Recommended", for all but a few devices those designations only mean "approved/recommended for use with their Internet service", and not necessarily approved for the new upload speeds. See:
Also see the "All Compatible Devices" link near the bottom of https://www.xfinity.com/support/devices (at the moment it points to https://assets.xfinity.com/assets/dotcom/projects/cix-4997_compatible-devices/2024.03.14%20Full%20List%20of%20Compatible%20Devices.pdf, but this changes from time to time).
You need one of Comcast's newer rental gateways or one of the few retail devices shown in the "Next Gen Speed Tier" group with an upload speed rating in the "All Compatible Devices" PDF. Also see the Reddit link, which lists the approved retail devices as well as other requirements for faster uploads speeds. Comcast could make all of this much clearer, but they have chosen not to do so.
Please be aware that there are 2 kinds of responses in this Forum: Replies and Comments. When you Comment on a post by scrolling down to "Comment on this post here...", I am notified of your response. But if you select Reply, I am NOT notified and may not be aware of your response.
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XfinityArmand
Official Employee
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2.1K Messages
1 year ago
Hi there @micknbern99! Thanks so much for taking the time tor each out to Xfinity Support here on our Community Forum. We are so glad to hear from you and want to assist in any way that we can to get things with your intenret squared away. No worries! You have reached out to a team of experts dedicated to ensuring you are having the best experience with your service. We do see your message and will follow up with you there to get the ball rolling. 😉
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EG
Expert
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110K Messages
1 year ago
@micknbern99 @XfinityArmand
Please see this post about direct messaging the support team;
https://forums.xfinity.com/conversations/getting-started/direct-message/6445fb0eb9339b2013e8ff9c?commentId=6446bf50b9339b2013e93478
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