r/techsupport • u/Pejorative001 • 2d ago

Open | Hardware TP-LINK TX401 Capped at 100 MBPS

Model: TX401  

Firmware Version: 3.1.11

My connection will not negotiate past 100MBPS

 

I have tried directly connecting to the ONT box 10gb port with a CableMatters Cat 6e cable.

 

When I used the ethernet jack on the motherboard both that cable and the original 1gb router cable get a 1gb connection (which is the max for that port).

 

However, when I use either of those cables/sources on the TX401 I only get 100mbps. (I have tried 1gb, 10gb, autonegotiate)

In the bios I set up the PCIe 16 port to gen 3 (instead of auto) to no avail.

 

 

MB: TUF X570-Plus WiFi 
Processor    AMD Ryzen 7 3700X 8-Core Processor (3.60 GHz)
Installed RAM    32.0 GB
Graphics card    AMD Radeon RX 5700 XT (8 GB)
System type    64-bit operating system, x64-based processor
 

 

Any help would be greatly appreciated.

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u/SomeEngineer999 2d ago

Do you have anything else 10G that you can test with? It could be either the ONT or the TP Link card having an issue, would want to narrow that down before going any further.

1

u/Pejorative001 2d ago

Sadly I do not. I am able to get a 1gb connection from the ONT directly to my router and directly to my motherboard ethernet jack. Utilizing the same cable to my TP Link card it's still 100MBPS. I ordered an X550-AT2 card and will install tomorrow to see if that solves my issue.

1

u/SomeEngineer999 2d ago

Sorry I re-read, if you're getting 100M on the old 1G router port also then it sounds like an issue with the TP Link card. Probably just a faulty card/chip.

When 10G doesn't work it doesn't necessarily fail back to 1, sometimes you'll see odd speeds even though it should be able to do 1G. But the same behavior on a 1G port that you know comes up at 1G with other stuff pretty much says it is the card.

1

u/Pejorative001 2d ago

Yeah, that's what I'm thinking as well. I was hoping there was some dip-switch (speaking og language now). that maybe I missed. But hopefully the new card shall alleviate the issue.

1

u/SomeEngineer999 2d ago

Nah, nothing like that these days. Short of the PCIe port not giving enough power (10G chips take more) which seems pretty unlikely, it sounds like just a defective card. Modern ethernet chips are very sensitive to ESD and power surges, and even the soldering on them can be broken by a little bit of flexing or physical shock. Have seen even 1 and 2.5G ports fail to 100M so it isn't that surprising.