Tech Support Guy banner
Cancel

Ethernet speed capped at 100 mbps

1619 Views 9 Replies 4 Participants Last post by  JohnWill, 
B
Background: I recently was out of town and while out of town some people used my computer and messed with the ethernet. When I got back, I was getting a tenth of my previous speeds. I have gigabit wifi, but am getting around 80 mbps.

What I think is the problem:
When I look at the ethernet status, it says that the speed is 100 mbps, which makes me think the link speed is somehow being capped.
I also ran a diagnostic, and it said: Your computer appears to be correctly configured but the device or resource is not responding

Solutions I have tried (which haven't worked):
1. updated controller drivers
2. made sure speed & duplex was set to auto negotiation
3. changed ethernet cables to a brand new one (which didn't change anything), and then checked the cable by plugging it into a laptop, which got the 800 mbps speed I should be getting
4. cleared DNS cache and reset IP settings through admin command prompt

At this point I have no clue what to do. These are all the tips I found online, and I am hoping that I am just missing something simple.
Save
Like
Status
Not open for further replies.
1 - 10 of 10 Posts
Couriant
To confirm, you are getting 80 or 100Mpbs on Ethernet? What does the connectivity speed show in the Network Adapter Status page? For example

Rectangle Font Screenshot Parallel Number
See less See more
Save
Like
B
Couriant said:
To confirm, you are getting 80 or 100Mpbs on Ethernet? What does the connectivity speed show in the Network Adapter Status page? For example

View attachment 290302
Click to expand...
It looks exactly like that. The speed says 100, but it should say something around 850 because I have gigabit wifi.
Save
Like
Couriant
Ethernet and WiFi are different connections. For Ethernet (wired) it would say either 10Mbps, 100Mbps, or 1Gpbs.

Can you do a screenshot on what you are seeing?
Save
Like
B
Couriant said:
Ethernet and WiFi are different connections. For Ethernet (wired) it would say either 10Mbps, 100Mbps, or 1Gpbs.

Can you do a screenshot on what you are seeing?
Click to expand...
Rectangle Font Screenshot Parallel Software

It's ethernet.
See less See more
Save
Like
Couriant
What is the name of the Ethernet card?
Save
Like
B
Couriant said:
What is the name of the Ethernet card?
Click to expand...
I do not know how to find that. Is that information in this screenshot I just took?
Rectangle Font Technology Number Terrestrial plant
See less See more
Save
Like
Gr3iz
2
OK, you've got a gigabit card, so someone may have changed a setting. Go to Settings, Network & Internet, Ethernet. Change adapter settings. Properties. Configure. Under the Advanced tab scroll down to Speed & Duplex and ensure the Value is Auto Negotiation. Hopefully my circles and arrows don't confuse more than help you in this journey ...

Product Rectangle Font Slope Parallel
>>
Product Font Rectangle Parallel Screenshot
See less See more
Save
Like
Couriant
Also, does the speed show 1000Mbps in the drop down?
Save
Like
JohnWill
Check your cable. Gigabit requires all eight wires, but 100mbit will work with four. If a wire is bad in the cable, you are likely to see something like this.
Save
Like
1 - 10 of 10 Posts
Status
Not open for further replies.
Tech Support Guy
A forum community dedicated to tech experts and enthusiasts. Come join the discussion about articles, computer security, Mac, Microsoft, Linux, hardware, networking, gaming, reviews, accessories, and more!
Full Forum Listing
Explore Our Forums
Hardware Virus & Other Malware Removal Off Topic Lounge Thread Games & Discussion Networking
Top