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Xfinity - Performance Pro 200mbps vs 100mbps

Regular Visitor

Xfinity - Performance Pro 200mbps vs 100mbps

I recently upgraded from 100mbps to 200mbps plan but did not see any difference in my download speeds.  With 100mbps plan, I get at most 80mbps but average 60mbps.  Any ideas on why I seem capped at 60-80mbps?  


I dont see any signal integrity issues since my snr across all 16 channels is about 40dB (Arris SB6183 cable modem).   Could it be the actual coax line? 

Diamond Problem Solver

Re: Xfinity - Performance Pro 200mbps vs 100mbps

Post your modem’s signal levels, and also how you’re testing your speeds

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Regular Visitor

Re: Xfinity - Performance Pro 200mbps vs 100mbps

I run speedtest via Xfinity app as well as just  


Here are my signal status:

ChannelLock StatusModulationChannel IDFrequencyPowerSNRCorrectedUncorrectables
1LockedQAM2568411000000 Hz4.6 dBmV40.2 dB00
2LockedQAM2569417000000 Hz4.4 dBmV40.1 dB00
3LockedQAM25610423000000 Hz4.2 dBmV40.1 dB00
4LockedQAM25611429000000 Hz4.2 dBmV40.1 dB00
5LockedQAM25612435000000 Hz3.8 dBmV40.0 dB20
6LockedQAM25613441000000 Hz3.9 dBmV40.0 dB00
7LockedQAM25614447000000 Hz3.6 dBmV40.0 dB00
8LockedQAM25615453000000 Hz3.6 dBmV40.0 dB00
9LockedQAM25616459000000 Hz3.4 dBmV39.9 dB00
10LockedQAM25617465000000 Hz3.2 dBmV39.9 dB00
11LockedQAM25618471000000 Hz2.8 dBmV39.8 dB10
12LockedQAM25619477000000 Hz2.9 dBmV39.8 dB250
13LockedQAM25620483000000 Hz2.4 dBmV39.7 dB20
14LockedQAM25621489000000 Hz2.3 dBmV39.6 dB00
15LockedQAM25622495000000 Hz1.8 dBmV39.4 dB00
16LockedQAM25623507000000 Hz1.1 dBmV36.9 dB20