Question Ethernet speed in one room is 20% that of other room

[kep55]

We had ethernet installed when our house was built. Our ISP ran fiber to our house. In one room, Ookla Speedtest gives download speeds of 650-725 Mbps. In another room, we get 128-138 Mbps. I disabled the Intel wireless device. The house router is located about the same distance from both pcs.
Besides disabling the Intel wireless device, should the add-in card be completely removed? Could the network chip on the one pc (Gigabyte ga-ma770-ud3 mobo circa 2008) be the problem? I have a number of online classes and viewing videos for them requires a good connection.

 

[bill001g]

128mbps is more than enough for pretty much anything you do on the internet. Watching 4k netflix only uses 30mbps so you should have no issue viewing videos.

Problem is very strange. It would have been better if you got the standard my connection only run 94mbps which is a cable problem.

The length of the cables makes no difference as long as they are less than 100meters.

Now in theory you could be getting lots of errors and only getting 128mbps but that is unlikely.

It is likely the pc but hard to say what. I would first try to swap pc around to see in different devices have the same issue or if your pc runs properly plugged directly into the router.

One common thing that limits the speed is if you have any of the so called "gaming" network software installed. Anything that talks about favoring one kind of traffic over another can be a issue. This software many times comes bundled with the bloatware on video cards or motherboards. You want to uninstall any application like this. A very common program that does this is CFOSSPEED.

 

[ex_bubblehead]

Check all cables and terminations. This is a cable issue.

 

[evermorex76]

Simple way to confirm cabling is the issue is to move the PC to the room that works well, if you can. Past that, buy a Cat5e or Cat6 cable long enough to reach from the router around the rooms to the "bad" PC. It COULD also be the port on the computer going bad, so if the new cable doesn't show improved performance you could try a USB 3.x to Gigabit Ethernet adapter.

Nothing in software should be cutting speeds that low. And just because your PC is getting "enough" speed for the task you want right this second doesn't mean you should just accept it. What is the rated speed for your Internet service supposed to be?

The reason this is probably a cabling issue is that you've likely got a solid connection on 2 pairs, and iffy connections on the other 2. So the link drops to 100Mbps most of the time but occasionally gets Gigabit so you get a few seconds of higher speeds. If you look at Event Viewer, you'll probably see a lot of events for the network port changing state.

It's VERY, RIDICULOUSLY common for network jacks put in by electricians via contractors to have bad terminations at one or even both ends, and even actual telephony technicians can screw them up. All they ever do once they're done is check that it gets momentary continuity, not any performance testing, and an electrician may not even go that far and skip testing entirely because "they know what they're doing".