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Extremely slow Wi-Fi- SBG8300

  • 14 February 2024
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I just bought a SBG8300 to replace my old cable model and netgear nighthawk ac1900.  performance of the new arris modem/router is very disappointing.   I get 450mbps right next to the router,  60-80mbps 20-25 feet away,  and 0-20 mbps 30 feet away.   that’s far worse that the nighthawk that’s nearly 10 years old.  is there anything I can do to improve wifi signal strength or it’s just the way the SBG8300 is?

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Best answer by plemans 15 February 2024, 15:07

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The SBG8300 is an AC1900 device. Thats what you replaced. why are you expecting faster speeds from the same specs? 

What device are you testing with? 

What is inbetween the router and the testing device? Keep in mind certain materials block wifi better than others. If you’re home is brick, plaster lathe, got foil lined insulation, etc, you’ll see faster drop off’s in speed versus standard wood/sheetrock

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didn’t know they’re the same kind of device.  mostly standard wood/sheetrock between router and testing location.  specs are 1800 sq ft coverage for night hawk and 2800 sq ft for SBG8300.  So I would definitely expect better signal strength and speed from SBG8300.  my test was done with the exact same setup, same locations for router and testing device.

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The “up to ****ft” coverage is always over inflated and varies by manufacturer. 

I’d return the device if the old one wasn’t bad. Your only real upgrade from going from one to the next was the SBG8300 has a better internal modem. But you won’t see that performance over wifi. 

If it was me, I’d upgrade to either something from the AX generation or I’d upgrade to a wireless mesh system. You could use the old modem/router and just put it in modem only mode. Then connect the mesh system to it and have better coverage. 

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Thanks @plemans .  I switched back to my old nighthawk.  Now I’m getting a little less than 300mbps at the router and 170mbps at 25 ft.  This is far better coverage than the SBG8300, no wifi dead zones anymore.  I’ll try AX next.

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If you can wait a little bit. Not sure who your isp is but xfinity has been working on figuring out the bugs in their next generation upload speed increase. There’s supposed to be a few devices being worked on for that. their reddit page stays pretty up to date on those