topic Re: Issues with 5 gigabit card in Internet

Issues with 5 gigabit card

HMM_ — Mon, 17 Feb 2025 20:28:52 GMT

I recently upgraded to a BrosTrend 5Gb PCIe Network Card and a 3-gigabit internet plan. However, I'm encountering an issue where my computer fails to connect to the internet when the network card's speed & duplex setting is on 5 Gbps Full Duplex. It works fine on 2.5 Gbps Full Duplex. I've ensured the network card has the latest drivers installed, and it's connected using a CAT 7 cable to a 10-gigabit port on my Gigahub. Is there a possible fix for this?

Issues with 5 gigabit card

Ciel — Tue, 18 Feb 2025 14:15:05 GMT

I recently got a new motherboard with 5Gbe Realtek RTL8126 internet however the ethernet will not connect at all if I plug it into the 10G port, the only way it will connect is if I go into windows settings and change the speed & duplex to 2.5G. I have the latest drivers and I don't think there are any problems with the modem or the RTL8126, maybe it's a firmware issue?

Update: it seems i am not the only one with this problem I found a thread on reddit where other people are also having the same problem

Issues with 5 gigabit card

Vanadiel — Tue, 18 Feb 2025 14:16:09 GMT

Not all 10 Gbps ports can sync at 1/2.5/5/10. It depends on the chipset what they can sink at.

You can go into the modem GUI and manually select the sync speed of the port, and see if it supports 5 Gbps. It could also be an ethernet cable problem.

Re: Issues with 5 gigabit card

Vanadiel — Tue, 18 Feb 2025 03:19:22 GMT

Not all chipsets can link at 5Gbps. It could also be a firmware bug with the home hub if it worked previously.

You can also try selecting the speed in the home hub, but I don't know if 5 Gbps is selectable or not.

Re: Issues with 5 gigabit card

HMM_ — Tue, 18 Feb 2025 16:01:45 GMT

I have the modem port set to 10 gigabit and I don’t think the cable is the issue in my case since it works perfectly fine for 2.5 gigabit speeds and below that.

Re: Issues with 5 gigabit card

Vanadiel — Tue, 18 Feb 2025 16:29:52 GMT

If you force the modem at 10 Gbps it will only be able to link at 10 Gbps, which is not supported by your 5 Gbps card.

Both would have to match, so you would need to set the modem at 5 Gbps.

Re: Issues with 5 gigabit card

HMM_ — Wed, 19 Feb 2025 17:30:12 GMT

I still get no network connection after setting the modem and network card speed specifically to 5.0 Gbps Full Duplex.

Re: Issues with 5 gigabit card

Vanadiel — Wed, 19 Feb 2025 18:49:13 GMT

If you open up a command prompt and type in ipconfig what is the output showing for the adaptor?

Re: Issues with 5 gigabit card

HMM_ — Thu, 20 Feb 2025 04:33:22 GMT

The output for the adapter did not show up when I typed in ipconfig.

Re: Issues with 5 gigabit card

Vanadiel — Thu, 20 Feb 2025 14:40:30 GMT

That is odd. What is the output when it links at 2.5 Gbps?

Re: Issues with 5 gigabit card

HMM_ — Sun, 23 Feb 2025 15:34:07 GMT

It doesn't show the output of the card for 2.5 either. Currently, I am using Windows 10.

Re: Issues with 5 gigabit card

Vanadiel — Sun, 23 Feb 2025 18:31:51 GMT

That is really odd. And it is working at 2.5 Gbps, correct?

Re: Issues with 5 gigabit card

HMM_ — Tue, 25 Feb 2025 05:11:02 GMT

Yes, it works fine at 2.5 Gbps.
From searching on websites like Reddit, the problem may be with the Modem's firmware.

Re: Issues with 5 gigabit card

dks — Tue, 25 Feb 2025 11:51:28 GMT

More that it is the network card firmware. This is an issue with some 5Gb network cards.

Re: Issues with 5 gigabit card

HMM_ — Wed, 26 Feb 2025 22:19:38 GMT

The issue still occurred when I tried using the drivers from both Realtek and BrosTrend.

Re: Issues with 5 gigabit card

BellNick — Mon, 03 Mar 2025 17:02:19 GMT

Hi everyone,
Thank you for all the great troubleshooting and discussion. We appreciate you bringing this to our attention and we have taken a deeper look. We have confirmed there is an issue present and currently under investigation.
Once we have further information we will provide an update.

Re: Issues with 5 gigabit card

Evomasta — Thu, 27 Mar 2025 09:22:36 GMT

I'd like to know when this gets resolved as well, I bought a pair of TP-Link Deco BE65 Pro's to specifically take advantage of my 3gbit connection (BE65 Pro has two 5GbE ports and one 2.5GbE port (Using the 2.5GbE port as the WAN port until it's fixed) Thanks.

Re: Issues with 5 gigabit card

dks — Thu, 27 Mar 2025 10:33:50 GMT

While an issue has been found, my personal position is that 2.5 Gb and 5Gb network cards have enough other issues to be problematic. I avoid them, even though they are lower cost. I went to a 10 Gb network card, which is backwards compatible with lower speeds, and have not regretted it, save that the initial TP-Link 10 Gb card died completely after one year. I replaced it with an ASUS 10 Gb network card and have had no issues since. Others may have a different experience.

Re: Issues with 5 gigabit card

Evomasta — Thu, 27 Mar 2025 11:13:31 GMT

I am referring to my Deco BE65 Pro which is a mesh router, not a network card in my PC. I would have to pay alot more to get the higher end version of the mesh router to get 10GbE ports sadly. I can wait until it's fixed

Re: Issues with 5 gigabit card

Lexcyn — Thu, 27 Mar 2025 21:20:34 GMT

So I just purchased an eero Pro 7 and installed it today, and it too has this same issue. It has dual 5Gb ports and they will only negotiate at 1Gbps no matter what I do. I've tried swapping cables etc to no avail. It will negotiate properly to a physical 2.5Gb card without issue. My previous router was an eero Pro 6E with a single 2.5Gb port and it worked at that speed without issue, so the problem appears to be with the Gigahub.