Problem - Ethernet speed locked at 100Mb/s

[-rascal-]

40 minutes ago, Windows7ge said:

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

 

Right, 8th Gen Intel was release in Q4 2017, but Z390 SHOULD support 1000 Mb connection. Heck, my B250 board at work runs at 1Gb, and that's even older. Don't think it's age of CPU / motherboard related.

[-rascal-]

1 minute ago, Karlos10pl said:

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!

 

Oh really?!

As the owner, they DON'T give you admin access to the router??

 

For example, the router/modem the my ISP provided, there are a set of admin login credentials, so I can...

• Change the Wi-Fi password
• Block device(s) from the network
• Throttle speed of device(s)
• Firewall settings
• Port Forwarding, etc
• etc...

[Karlos10pl]

3 minutes ago, -rascal- said:

 

Oh really?!

As the owner, they DON'T give you admin access to the router??

 

For example, the router/modem the my ISP provided, there are a set of admin login credentials, so I can...

• Change the Wi-Fi password
• Block device(s) from the network
• Throttle speed of device(s)
• Firewall settings
• Port Forwarding, etc
• etc...

The modem/router does not respond at the default adress nor at the gateway adress. I was told all the changes can only be made by tech support at my request (port forwarding etc.)

[Windows7ge]

4 minutes ago, -rascal- said:

Right, 8th Gen Intel was release in Q4 2017, but Z390 SHOULD support 1000 Mb connection. Heck, my B250 board at work runs at 1Gb, and that's even older.

Don't think it's age of CPU / motherboard related.

You misunderstand. I'm aware Gigabit has been a standard on motherboards for a very long time now. Heck Gigabit on desktop motherboards predates X58/LGA 1366. No, where I'm coming from is if other clients auto-negotiate up to Gigabit but this sole client only auto-negotiates up to FastEthernet then I think we're dealing with hardware degradation of the built-in NIC.

[Windows7ge]

24 minutes ago, Karlos10pl said:

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

Well, there's a couple things we can test to try and disprove my current theory that it's a motherboard problem.

1. We know the cable is good. Can you test a different port on the router? Go back to your Network Adapter and see if it registers 10/100/1000Mbps.
2. Try setting up a Peer-to-Peer connection between this system and a laptop or other device (eliminate the router entirely). Layer 2 should auto-negotiate link speed without IP addresses or connect two Windows clients directly together and you'll see them get the 169.254.0.0/16 network. See if that makes a difference.

If neither of these show you 10/100/1000Mbps on your desktop then you have a NIC problem.

[-rascal-]

20 minutes ago, Windows7ge said:

You misunderstand. I'm aware Gigabit has been a standard on motherboards for a very long time now. Heck Gigabit on desktop motherboards predates X58/LGA 1366. No, where I'm coming from is if other clients auto-negotiate up to Gigabit but this sole client only auto-negotiates up to FastEthernet then I think we're dealing with hardware degradation of the built-in NIC.

 

Ahhh...okay.

I see what you meant then.

Hmmm...unless the NIC is faulty from the get-go, it shouldn't degrade that fast.

[Karlos10pl]

12 minutes ago, Windows7ge said:

Well, there's a couple things we can test to try and disprove my current theory that it's a motherboard problem.

1. We know the cable is good. Can you test a different port on the router? Go back to your Network Adapter and see if it registers 10/100/1000Mbps.
2. Try setting up a Peer-to-Peer connection between this system and a laptop or other device (eliminate the router entirely). Layer 2 should auto-negotiate link speed without IP addresses or connect two Windows clients directly together and you'll see them get the 169.254.0.0/16 network. See if that makes a difference.

If neither of these show you 10/100/1000Mbps on your desktop then you have a NIC problem.

Already tried nr 1. to no effect. As for the nr 2 I am not sure if I am skilled enought to do it.  To avoid confusion the router and modem are merged into one device in one box.

[Windows7ge]

16 minutes ago, -rascal- said:

 

Ahhh...okay.

I see what you meant then.

Hmmm...unless the NIC is faulty from the get-go, it shouldn't degrade that fast.

...lightning strike?  ¯\_(ツ)_/¯ Those are notorious for taking down network equipment/ports.

 

Karlos10pl, you guys ever get lighting in Poland?

 

I'm also open to the idea it might be a BIOS bug that an update could possibly fix...*grasps at straws*...

 

9 minutes ago, Karlos10pl said:

Already tried nr 1. to no effect. As for the nr 2 I am not sure if I am skilled enought to do it.  To avoid confusion the router and modem are merged into one device in one box.

Oh Peer-to-Peer is easy. Unplug the cable from your Router (Modem/Router combo unit in your case), plug that end into your laptop. Windows will handle the rest.

 

Then just check your desktop if the NIC says 1.0 Gbps. It should assuming the laptop doesn't have a 100Mbps port but any remotely modern laptop shouldn't.

[Karlos10pl]

23 minutes ago, Windows7ge said:

...lightning strike?  ¯\_(ツ)_/¯ Those are notorious for taking down network equipment/ports.

 

Karlos10pl, you guys ever get lighting in Poland?

 

I'm also open to the idea it might be a BIOS bug that an update could possibly fix...*grasps at straws*...

 

Oh Peer-to-Peer is easy. Unplug the cable from your Router (Modem/Router combo unit in your case), plug that end into your laptop. Windows will handle the rest.

 

Then just check your desktop if the NIC says 1.0 Gbps. It should assuming the laptop doesn't have a 100Mbps port but any remotely modern laptop shouldn't.

Yeah we get them  But it did not strike my house (thankfully ) The problems started before I did the BIOS update and they persisted after doing it.

I did that Peer-to-Peer check. It showed the speed at 100Mb/s.

 

Laptop I tested it on is Lenovo Ideapad 330-15 i5-8300H

[Windows7ge]

13 minutes ago, Karlos10pl said:

The problems started before I did the BIOS update and they persisted after doing it.

So you're already on the latest?

 

14 minutes ago, Karlos10pl said:

I did that Peer-to-Peer check. It showed the speed at 100Mb/s.

Then assuming:

1. The cable is good.
2. The 2nd client was capable of Gigabit.

Then the router has nothing to do with it and we have a motherboard/NIC problem.

 

If you don't have any BIOS settings you need saved you can try resetting CMOS but that likely won't do anything. From here I'd look inside the Ethernet port. Is there anything in it physically blocking the connection? Dust? Do any of the pins look out of place?

 

If all of that checks out you most likely have a faulty onboard NIC.

[Karlos10pl]

1 hour ago, Windows7ge said:

So you're already on the latest?

 

Then assuming:

1. The cable is good.
2. The 2nd client was capable of Gigabit.

Then the router has nothing to do with it and we have a motherboard/NIC problem.

 

If you don't have any BIOS settings you need saved you can try resetting CMOS but that likely won't do anything. From here I'd look inside the Ethernet port. Is there anything in it physically blocking the connection? Dust? Do any of the pins look out of place?

 

If all of that checks out you most likely have a faulty onboard NIC.

Yes I am on the latest BIOS.

I will buy a new cat.6 RJ-45 does not hurt to have an extra one around in the house. Shoud be here by friday 16.

I will check for damge and send a pic of the port here.

I will also look around in the BIOS settings, and try to clear CMOS.

I will get back to you as soon as I will get everything checked. Thanks.

[Darren]

In my experience, assuming Gig capable devices on each end it usually comes down to a cable. Rare, but it happens.

Would be good to try with another device too, PC to second PC, second PC to modem etc.

[Karlos10pl]

16 hours 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.

 

17 hours ago, Haraikomono said:

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

Called my ISP. They checked the settings. Everything is set at 1 Gb, and all ports run at 1 Gb. So no luck here.

[Karlos10pl]

Okay guys. Problem solved. Thank you for your help. 

Turns out that despite working on 1Gbps with other PC it was the cable that caused the issue. I connected the PC by a brand new one and it solved the issue.

 

Thank you once again for help. Best community ever.