Slower than what was promised

Jbdixon94 — Thu, 02 Apr 2026 21:37:29 GMT

Supposed to be on 300mbps but it's constantly 200-230, definitely slowed down in the past 4-5 weeks, tested it on WiFi and wired, any ideas?

Re: Slower than what was promised

Chrisee — Fri, 03 Apr 2026 06:18:01 GMT

@Jbdixon94 Sky's 300 full fibre service should on average deliver 300Mb/s acording go the "legal bit" here https://www.sky.com/broadband/full-fibre-broadband with a giaranteed minimum speed of 200Mb/s at the hub so you are getting what you are paying for.

The reason why speeds can drop at peak times is that to deliver a competitive product the network operators Openreach and City Fibre use a system where multple connections share a single fibre feed from the exchange.. Openreach publish their specs for their GPON fibre system where up to 32 connections in a local distribution point serving a small neighbourhood share a doenstream fibre with a 2.48Gb/s bandwidth. In practice they only sell up to 30 connections but divide 2.48Gb/s by 30 and you get an average of 83Mb/s which sounds horrendous given some isps sell packages up to 1.6Gb/s using that system. City Fibre use a different technology but it is also contended but they dont publish the share.

The reason it works is statistically very few users ever use more than a small fraction of the bandwdth they buy and most distribution points are not fully sold. However if you live in a road with lots of keen gamers you can see slow downs when a new game is released. Downloads one of the few activity that uses bandwidth. In pracice a slow down to 200Mb/s would not be noticeable except when running a speed test or dienloading a huge file. For example 200Mb/s could deliver 6 to 8 UHD video streams.

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Slower than what was promised

Re: Slower than what was promised