Solved Connection running at 100Mbps but Internet 10Mbps

January 31, 2016 at 22:02:15
Specs: Windows 10, Core i7 / 8 GB
Dell XPS 8300 running Windows 10 with Broadcom BCM57788 gigabit ethernet adapter. This sytem was testing fine with 50Mbps broadband service but now it's testing with download speeds under 10Mbps. I've tried updating the driver but that doesn't help. The network connection itself is running at 100Mbps (I only have 10/100 switches). The problem appears to be isolated to this one computer.

See More: Connection running at 100Mbps but Internet 10Mbps

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✔ Best Answer
February 14, 2016 at 12:55:26
Fixed it by trial and error. For whatever reason, unplugging my power line Ethernet adapters for a few seconds has gotten the connection back up to speed.


#1
February 1, 2016 at 03:18:05
"The problem appears to be isolated to this one computer"
Have you swapped Ethernet cables?

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#2
February 1, 2016 at 03:56:36
"Broadcom BCM57788 gigabit ethernet adapter"

Another possible to try, if it has these features.

Disable energy efficiency and green ethernet settings in the advanced settings of the adapter properties section.


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#3
February 1, 2016 at 04:51:03
The network connection itself is running at 100Mbps (I only have 10/100 switches). The problem appears to be isolated to this one computer.

If the LAN is running at 100 Mbps then this shows you the network interface on this machine is working properly. I would suggest if you have more than one PC, you try to do a bandwidth test on several. Run them at the same time, to the same testing site and see what you get for results.

As is normal on a contention based network like the internet, your results will vary somewhat every time you run a test. Results during peak hours will normally show less than during off-peak hours.

You can get an eight 1000 Mbps switch for like $20, I would invest in one if you move any large amounts of data around.

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***


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Related Solutions

#4
February 6, 2016 at 19:02:39
I'm running Cat 5E cable all around and have had higher speeds before on this computer. There's no green features. My other machines on the network all run at high speeds. When I switch the Dell to the wireless card, it gets to about 25 Mpbs, which is not bad but still slower than my other computers. I may just have to disable the on-board LAN controller and switch to a third party card, but I hate to occupy an expansion slot with a redundant device.

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#5
February 6, 2016 at 21:25:58
I still suspect your cable. It may show 100Mbs in idle (low traffic) condition, but if you start downloading the port speed possible goes down to 10Mbs.
Broken wire or bad contact in the RJ45 plug could be the cause. How long is this cable?
Have another Ethernet cable to test between Switch and PC.

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#6
February 7, 2016 at 06:41:07
I may just have to disable the on-board LAN controller and switch to a third party card, but I hate to occupy an expansion slot with a redundant device.

Please tell me you don't have both a wired, and a wireless interface enabled and connected on the same PC at the same time???

If you do, that's probably part of your problem. Windows get's a serious headache if you have both enabled and connected at the same time. Disable whichever one you don't want to use and then see if things don't improve.

Luckily both your interfaces are likely on the same subnet. If they were different subnets, with different gateway's then your PC would just stop communicating altogether.

Oh and do try a different network cable as suggested by sluc If you can swap the cable between another computer that's working properly and the one that isn't, then you can see if the issue goes with the cable or remains on the original PC.

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***

message edited by Curt R


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#7
February 14, 2016 at 12:55:26
✔ Best Answer
Fixed it by trial and error. For whatever reason, unplugging my power line Ethernet adapters for a few seconds has gotten the connection back up to speed.

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#8
February 14, 2016 at 13:12:01
"Fixed it by trial and error"
That's how you do it, nice work, thanks for letting us know.

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