Ethernet considerably slower than Wifi

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MrMooj

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May 14, 2017
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My ethernet connection is radically slower than Wifi. With Speedtest, I'm lucky to break 45mbps on my ethernet connection. 5.0 wifi (on my phone) easily pulls 85-90+ through walls and floors. The ethernet cable is Cat5e, copper core (not copper-clad aluminum) installed and tested by myself. The cable tests fine.

I've tried multiple ports on the cable modem to no avail. I've tried updating the device drivers to no avail. I've tweaked the ethernet port settings to no avail. I've tried many of the applicable solutions in other threads -- also to no avail.

Any solutions/suggestions?
 
Solution
B
Finding this kinda of problem without a quality testing meter is hit and miss. The most common problem is one of the ends just slightly loose. If it is a simple patch cable it tends to be simplest to just buy a new commercially made one. The ones in the walls you have little choice. The keystone jacks are a little simpler because you can pull the wires out one at a time cut a tiny bit off and repunch them down. If they are Rj45 plugs those you have to cut off and redo all 8 wires correctly every time.
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bill001g

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Aug 9, 2012
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That is a very strange speed to get. First step is to see what the port negotiated with the router. How you find it varies a bit between windows releases but it is in genera on the ethernet status screen. My guess is the port is running 100m half duplex.

Make sure you have this set to auto in the ethernet configuration.

If it does not negotiate to 1gbit (assuming your router can has gigabit ports) it has to be a cable problem. Cables are very hard to make correctly without a expensive testing meter. The cheap testing meter just show connections between pins they can not tell if the pairs are not correct or if a pin is making only partial contact.

If it is running at 1gbit then it has to be a software issue of some kind. You could try IPERF and transfer data between 2 machines in your house to see if there is any difference.

Now if you have a killer ethernet chipset try the driver from the killer site that has all the killer features removed.
 
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MrMooj

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May 14, 2017
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Thanks for this.

I've isolated it to a cable or connector problem. The wall cabling is fine (laptop on a shorter patch negotiates gigabit and pulls about 235mbps, and my connection is 250mbps tops, so... that's good).

I'm thinking it's either a finicky cable or NIC. I would believe it's strictly the cable but apparently my particular on-board network card is apparently ridiculous when it comes to negotiating speeds over cables longer than 20 feet, and unfortunately the wall run is on the side of the room, so.
 
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B

bill001g

Titan
Aug 9, 2012
28,360
2,766
125,640
Finding this kinda of problem without a quality testing meter is hit and miss. The most common problem is one of the ends just slightly loose. If it is a simple patch cable it tends to be simplest to just buy a new commercially made one. The ones in the walls you have little choice. The keystone jacks are a little simpler because you can pull the wires out one at a time cut a tiny bit off and repunch them down. If they are Rj45 plugs those you have to cut off and redo all 8 wires correctly every time.
 
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Solution
M

MrMooj

Prominent
May 14, 2017
4
0
510


Going commercial cable is what I did. I've always hated crimping, for the reasons you said, and I recrimped them several times to no avail. The wires were done up to 568B standard over and over, checked and rechecked -- nothing. Maybe shoddy terminals (like I said, the cable itself is solid, no problems for the wall runs to/from the keystones).
 
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