It can be difficult diagnosing problems without some basic information.
Have you checked the 'Check Service Status' at the top of the page ?
If nothing is showing try phoning 0800 561 0061, this will tell you of more local issues that may be affecting the area. Be aware that it isn't a manned line.
Go round all the accessible co-ax connections and ensure that they are finger tight.
If everything above is OK we need do some troubleshooting; to start with …
Can you set up a Broadband Quality Monitor (BQM) at thinkbroadband.com - this will give you an insight into what is happening with the signal at the other side of the Hub, it will take a few hours to get any kind of trend showing although you can post the link straight away.
Post a link to your BQM on here.
Instructions for posting BQM Link
Under your BQM graph are two links in red.
Click the lower link (Share Live Graph) then click generate.
Copy the text in the Direct Link box, beware, there may be more text than you can see.
On here click the Link icon (2 links chain to the left of the camera icon)
In the URL box paste the link you copied and then click OK - you can post the link straight away.
Can you please
Type 192.168.0.1 (192.168.100.1 in Modem mode) into your browser URL bar and press enter.
When the page appears DO NOT LOG IN but click ‘Check Router Status’.
Copy and paste the contents of the Downstream, Upstream and Network Log tabs onto here, if you get a yellow warning click the Post button again.
I have checked the properties of the Gigabit ethernet port which comes directly from my Gigabyte motherboard and it does appear to be limiting it to 100mbps instead of allowing up to 1000mbps? (see first two pics)
I've also eliminated the possibility of an issue with the cable as when I plug it directly into the port on my fairly old laptop I'm able to get 180mbs download speed (see last three pics)
I definitely know that the ethernet port on the gigabyte motherboard is capable of 1000mbps as I did a number of tests when I first upgraded to M350 a year or so ago and was acheiving that speed and more but that was when I was using Windows 7 and before I reformatted and installed windows 10 on it?
What I'm struggling to understand is I've updated to the latest driver directly from the intel website and it still doesn'e seem to want to go any faster than 100mbps, so could it be some setting within windows 10 itself?