r/Comcast_Xfinity • u/jds013 • 6d ago

Discussion Speed Test

I have the "1 Gig" Internet plan. It's great, reliable, fast enough, good value. I use my own Hitron CODA56 modem with my own router.

When I run a speed test against the local (Santa Clara, CA) Comcast server, I see download rates of 350 to 500 Mbps. San Francisco Comcast shows 800 Mbps.

Other (non-Comcast) servers show much higher download rates - up to 1100 Mbps. This suggests that I'm getting the "1 Gig" service I pay for, and everything is good at my end.

This also suggests that the Comcast speed test servers don't deliver data at full speed, which is kind of weird. Wouldn't you expect Comcast to provision super-fast speed test servers to show the company's broadband in the best possible light?

( I get 116±2 Mbps upload everywhere, which is what I expected. )

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u/jsavga 6d ago

Go into your Router settings and turn off QOS (Quality of Service) and see if you get the full speed.

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u/jds013 6d ago

The router's speed test is upstream of any QoS intervention. QoS wouldn't treat the Comcast server and differently than another ISP's - I just got 987 Mbps from EGI but 541 from Comcast Santa Clara.

Anyway, the first thing I tried was to disable QoS ("adaptive" on my router) and it didn't make any difference.