Problem - Ethernet speed locked at 100Mb/s

[Karlos10pl]

Hi guys. I am asking for your help.

I have a problem with my Internet connection. Despite having 300Mb/s Internet I only get below 100Mb/s on my PC. I know for a fact that this is a problem with this PC, because others do not experience the same issue.
I use cat.5e cable, which I tested with another PC and had no problems. The cable is connected directly to the ISP provided router/modem.

Widnows10, all drivers and BIOS are up to date as of 14 March 2021.
Windows shows it as 100/100 (Mbps), I even tried to force it to 1 Gigabit but it wouldn't work.

PC Specs:
Motherboard: MSI MPG Z390 Gaming Plus
CPU: Intel Core i5 8400
RAM:16GB (2x8GB)  HyperX Predator RGB 3200MHz CL16
GPU: nVidia RTX 3070 MSI Suprim
PSU: be quiet! System Power 9 600W 80 Plus Bronze
OS storage: GOODRAM 256GB 2,5" SATA SSD CX400

 

OS Name:                   Microsoft Windows 10 Enterprise
OS Version:                10.0.19042 N/A Build 19042

 

Built in network card

Intel(R) Ethernet Connection (7) I219-V

Driver version: 12.19.0.16
Intel Network Driver: 25.4.0.6

Any ideas what is causing the problem?

Thanks for the help.

Edit: As this may be important - the modem/router is: Technicolor CGA2121

 

[Windows7ge]

Can you temporarily boot another OS to help determine weather we're dealing with an OS issue or a hardware issue?

[-rascal-]

5 minutes ago, Karlos10pl said:

Hi guys. I am asking for your help.

I have a problem with my Internet connection. Despite having 300Mb/s Internet I only get below 100Mb/s on my PC. I know for a fact that this is a problem with this PC, because others do not experience the same issue.
I use cat.5e cable, which I tested with another PC and had no problems. The cable is connected directly to the ISP provided router/modem.

Widnows10, all drivers and BIOS are up to date as of 14 March 2021.
Windows shows it as 100/100 (Mbps), I even tried to force it to 1 Gigabit but it wouldn't work.

PC Specs:
Motherboard: MSI MPG Z390 Gaming Plus
CPU: Intel Core i5 8400
RAM:16GB (2x8GB)  HyperX Predator RGB 3200MHz CL16
GPU: nVidia RTX 3070 MSI Suprim
PSU: be quiet! System Power 9 600W 80 Plus Bronze
OS storage: GOODRAM 256GB 2,5" SATA SSD CX400

 

OS Name:                   Microsoft Windows 10 Enterprise
OS Version:                10.0.19042 N/A Build 19042

 

Built in network card

Intel(R) Ethernet Connection (7) I219-V

Driver version: 12.19.0.16

Any ideas what is causing the problem?

Thanks for the help.
 

 

Did you actually install the LAN drivers?

On the MSi site, the LAN drivers are version 25.4.0.6; nowhere does it has 12.19.0.16.

 

[Chris Pratt]

For anyone else coming to this thread, I can confirm that the onboard LAN for that mobo supports 1Gbps. That was my first thought, so I figured I should rule it out.

[Karlos10pl]

Just now, -rascal- said:

Yes they are installed. Even did it manually today to be sure.

 

Did you actually install the LAN drivers?

On the MSi site, the LAN drivers are version 25.4.0.6; nowhere does it has 12.19.0.16.

 

 

[Karlos10pl]

3 minutes ago, Windows7ge said:

Can you temporarily boot another OS to help determine weather we're dealing with an OS issue or a hardware issue?

I can try this.

[Haraikomono]

that number seems oddly suspicious, Id look into your router whether there is bandwith limitation for specific devices set by someone

[-rascal-]

2 minutes ago, Haraikomono said:

that number seems oddly suspicious, Id look into your router whether there is bandwith limitation for specific devices set by someone

 

^ This.

 

Also check the connection speeds on the router / modem, too.

It *MAY* have ports that run at 1Gb, and others that run at only up to 100Mb.

[Karlos10pl]

Just now, Haraikomono said:

that number seems oddly suspicious, Id look into your router whether there is bandwith limitation for specific devices set by someone

Tbh I do not have the acces to the router/modem settings. I only have acces to it through requests to my ISP. Annoying as hell and tech support is out of work already, so I can check tommorow. (I am from Poland so I am in a different time zone),

[Karlos10pl]

Just now, -rascal- said:

 

^ This.

 

Also check the connection speeds on the router / modem, too.

It *MAY* have ports that run at 1Gb, and others that run at only up to 100Mb.

Tried to switch it to antoher ports. No effect.

[Windows7ge]

2 minutes ago, Karlos10pl said:

I can try this.

I won't be surprised at all if booting something like Ubuntu or a fresh copy of Windows fixes the issue.

[Haraikomono]

1 minute ago, -rascal- said:

 

^ This.

 

Also check the connection speeds on the router / modem, too.

It *MAY* have ports that run at 1Gb, and others that run at only up to 100Mb.

yes. definetly, some routers still offer 1000/100mbit ethernet ports, and you can still choose whether the clients should get fast ethernet or gigabit.

good point

[Chris Pratt]

Just now, Karlos10pl said:

Tried to switch it to antoher ports. No effect.

How old is the router. I can't imagine anything remotely recent only having 100Mbps links, but if it's quite old it's possible.

[Karlos10pl]

2 minutes ago, Chris Pratt said:

How old is the router. I can't imagine anything remotely recent only having 100Mbps links, but if it's quite old it's possible.

Date of mfg is 03/2018

[Chris Pratt]

Just now, Karlos10pl said:

Date of mfg is 03/2018

Yeah. That's not old enough. It could be manually set to 100Mbps, but it's got to at least support 1Gbps.

[Karlos10pl]

Just now, Windows7ge said:

I won't be surprised at all if booting something like Ubuntu or a fresh copy of Windows fixes the issue.

Did a speedtest on Ubuntu. Same results as on Windows.

[-rascal-]

15 minutes ago, Karlos10pl said:

Did a speedtest on Ubuntu. Same results as on Windows.

 

You able to find the router make and model?

[Karlos10pl]

3 minutes ago, -rascal- said:

 

You able to find the router make and model?

modem/router is: Technicolor CGA2121

[Windows7ge]

18 minutes ago, Karlos10pl said:

Did a speedtest on Ubuntu. Same results as on Windows.

Oh? It's not a Windows issue for once!

 

If you've verified that other clients get Gigabit (or the full 300mbps) from this same Ethernet cable & router port what is the history of this system? It could be a NIC issue.

[Karlos10pl]

1 minute ago, Windows7ge said:

Oh? It's not a Windows issue for once!

 

If you've verified that other clients get Gigabit (or the full 300mbps) from this same Ethernet cable & router port what is the history of this system? It could be a NIC issue.

Well.... TBH the other laptop with Windows I connected didn't get the full 300Mb/s either, it got about to 200 Mb/s, but my MacBook gets full 300Mb/s on WiFi soooo....

[Karlos10pl]

5 minutes ago, Windows7ge said:

Oh? It's not a Windows issue for once!

 

If you've verified that other clients get Gigabit (or the full 300mbps) from this same Ethernet cable & router port what is the history of this system? It could be a NIC issue.

I bought all the parts brand new at a big PC Parts retailer in Poland. Put it toghether myslef. It originaly had 1060 6Gb in it, I switched to the 3070 few months ago, and the problems with the Ethernet started somwhere around that time. I was busy with my Uni stuff so I got to it now. No problems with it untill that.

[Windows7ge]

3 minutes ago, Karlos10pl said:

Well.... TBH the other laptop with Windows I connected didn't get the full 300Mb/s either, it got about to 200 Mb/s, but my MacBook gets full 300Mb/s on WiFi soooo....

The question here right now is why is Windows & Ubuntu auto-negotiating the link down to 10/100mbps and not 10/100/1000mbps? If you got clients to go over 100mbps on this connection that still brings your motherboard into question given the modem/router combo uses Gigabit Ethernet ports.

 

I see your CPU came out in 2017. So your motherboard is a couple years old at least no?

[-rascal-]

I think the router is auto detecting it as 100Mb connection?

Was not able to find much info, but I'm assuming you should be able to SET the ports to be 10/100/1000 Mb within the router's settings.

 

[Karlos10pl]

Just now, Windows7ge said:

The question here right now is why is Windows & Ubuntu auto-negotiating the link down to 10/100mbps and not 10/100/1000mbps? If you got clients to go over 100mbps on this connection that still brings your motherboard into question given the modem/router combo uses Gigabit Ethernet ports.

 

I see your CPU came out in 2017. So your motherboard is a couple years old at least no?

I bought all the parts new in Feb 2019. I am not sure about the exact MFG date.

[Karlos10pl]

1 minute ago, -rascal- said:

I think the router is auto detecting it as 100Mb connection?

Was not able to find much info, but I'm assuming you should be able to SET the ports to be 10/100/1000 Mb within the router's settings.

 

I only have access to it through my ISP tech support. (Yes it is a pain ) The tech support is out of work now, it is after midnight here in Poland. I will check on it tommorow. Thank you!