this post was submitted on 01 Jul 2025
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I used docsis 3.0 and it worked just fine. So why not?
Because docsis 3.0 standard is nearly 20 years old at this point and 3.1 is significantly faster. Docsis 3.1 is only 15, but 4 (which is still 8 years old) probably isn't supported by your ISP yet. But the speed difference is quite noticeable. 3.0 will theoretically do 1gbps down, and 100-200 up, but 3.1 could do 10 down and 1gbps up. In the age of symmetrical fiber internet those upload speeds are dire. 3.1 realistically gets you a symmetrical gig connection.
Ah, so 3.0 is fine if your internet still sucks. Got it.
Exactly. So it's great for xfinity
Xfinity likely wouldn't allow you to use it at this point. They've been pushing people toward 3.1 for a while now, and won't register a new 3.0 modem.