Visitor

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3 Messages

Friday, April 3rd, 2026 4:05 AM

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Not getting full speeds from new Arris S34

I recently did a factory reset of my Arris S34 modem as I am only getting ~950MBS download speeds instead of closer to the 2000 that my plan supports. I also realized that the network cable was plugged into the slower speed port. 

So, with the cable in the correct gig port and the factory reset completed, I am still not breaking 1000 MBS on this modem. 

Any other suggestions?

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Accepted Solution

Gold Problem Solver

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27.3K Messages

20 days ago

It is connected to an ORBI RBR750 Netgear Router

Netgear's specs for the ORBI RBR750 say that it has three 10/100/1000Mbps Gigabit Ethernet LAN ports, and one 1Gbps Gigabit Ethernet WAN port. The device does not support speeds above 1 Gbps.

Visitor

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3 Messages

OK I looked it up and you are correct. Have upgraded to Orbi 870 series and now have excellent speeds ~2300 Mbps. Problem resolved.

Gold Problem Solver

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27.3K Messages

22 days ago

... Arris S34 modem ... with the cable in the correct gig port ... I am still not breaking 1000 MBS on this modem. ...

Does the device the modem is connected to have a 2.5 Gbps or faster network card? If it's only a 1 Gbps card, you'll be limited to 940 Mbps or so. 

Visitor

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3 Messages

It is connected to an ORBI RBR750 Netgear Router

Official Employee

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2.3K Messages

20 days ago

Hello @user_b1d3ka, Thanks so much for taking a moment out of your day to leave a post on our community forum and we would be happy to help. I want to pull up your account so I can check your equipment and service levels to see why you're not getting higher speeds. If you could send our team a direct message with your full name, the name listed on the account (if different), and the service address associated with your account, I'd be more than happy to look into this for you. To send a Direct Message, please click on the chat icon in the top-right corner of the screen, next to the bell icon, and then type or select "Xfinity Support" to initiate a direct message.
 

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