Windows 10: Modem Can Go Up to 1Gbps - But its Capped - Help

I have an Arris TG1672G I bought on ebay that on paper can go up to 1Gbps. But for some unknown reason its capped at 100Mbps. My theory is that the person who sold it to me got it from an ISP that capped it to reduce traffic on its network. But I'm not 100% sure. Is there a way for me to somehow uncap it?

:)

 

Modem changed and now suddenly one computer on network is capped at 5mbps down

We recently upgraded our AT&T fiber internet to 300up/300down, which required a new modem. Before the swap, my particular computer was getting about 80mbps down, 10mbps up. After the swap, my down speed is capped at 5 mbps, but my up is 100 mbps (we still need to upgrade our switch to a gigabit switch).

I've tried every setting I can find as well as uninstalling and reinstalling the network adapter.

I plugged my network cable into a laptop just to confirm that there are no hardware problems between me and the switch, and the laptop got full up and down speed, so there's definitely something on my computer that's capping my speed.

Computer is running Windows 10 Pro and is on a domain network. All other computers on the same network (All Win7Pro or Win10Pro) have full up and down speed. Mine is the only one suffering this download capping issue.

Network adapter is Realtek PCIe GBE Family Controller. Tried updating driver. No joy. Connecting same computer via wifi gets 35mbps down, so the cap is adapter specific.

Down speed this morning was 85 mbps. Provider was AT&T and still is. They did swap out the modem for one that could handle the higher speeds, so modem is new.

Also already disabled Windows Auto Tuning via cmd prompt.

Any insight would be super helpful.

Current speedtest.net results:

PING ms
1
DOWNLOAD Mbps
5.51
UPLOAD Mbps
286.07

I connected directly to the modem to see if it's a switch issue, but even with the switch out of the equation, I'm capped at 5 down.

Also attempted Windows Network Reset. No improvement.

Bootable USB running Ubuntu using same machine and adapter is able to access full 300 download speed.

UPDATE: After booting Ubuntu, confirming speed, then restarting into Windows, suddenly my speed is up to over 100 down again. So basically I just had to make windows feel threatened that I was going to leave it for another OS? ¯_(ツ)_/¯

 

Wireless cable modem/router/firewall

can someone recommend me a wireless router with built in cable modem. Most of the devices ive seen are equiped with ADSL modems!

required features

• Wireless

• firewall

• router

• Built in cable modem

• fully telewest/blueyonder compatible

 

Which Wifi Modems Work Great with Spectrum?

But since I'm getting 340Mpbs speed on my current wifi modem do you think its worth it to upgrade to one with 1Gbps?