Help fix my wired internet speeds!

HungryHippos

HungryHippos

HungryHippos

Soldato
Joined
25 Mar 2004
Posts
16,016
Location
Fareham
For some reason my wired (1Gb) ethernet speeds when connecting to the internet aren't working properly/consistently.

My internet is 900/120 (recently gone to BT Full Fibre 900 service) but before this it was 150/30.

Example when not working properly is below. When I was on 150/30 the download would be 150 fine, but the upload would cap at 10Mbps like this.

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To make matters stranger, my PC can send files to my NAS, which is connected to the same router at the full 1Gbps speed no problem.

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My PC is connected via hardwire to my router, it takes a couple of hops to get there but it's all physically connected.

Router >> CAT6 face plate >> cable travels into loft space >> 1Gb unmanaged switch >> cable travels to CAT6 face plate in office >> cable to PC ethernet slot.

My other devices seem fine, such as the laptop sat right next to my PC. When my PC doesn't work the laptop is still fine (it's plugged into the other socket next to it in the office). My router seems to connect properly and is getting full speed, so the problem exists only on the PC as far as I can tell, and only when talking to the internet!

I've tried various things such as swapping the port/cable over with the laptop one, but that hasn't made a difference, so I don't think it's port or cable specific.

I've updated the BIOS on my motherboard (Gigabyte Aorus Z390 Master) from F8 to F10, which is the latest official one they have.

I've tried to update the network drivers using this link as well, in case it was a network driver issue:

https://www.gigabyte.com/Motherboard/Z390-AORUS-MASTER-rev-10/support#support-dl-driver-lan

I've set the NIC duplex speed to full duplex 1Gbps.

I'm on Windows 10 2004 version so the latest one out there, not sure if the problem came in with this but it's possible.

I can fix the issue temporarily by disabling and re-enabling my network card in Windows, so no physical changes occur to resolve it. After which full speed is back.

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I'd love to hear some ideas on what could be looked at?
 
Are you able to test PC to router with a different cable temporarily? I don’t think it’s going to make a difference, but it’ll confirm it’s the NIC/driver rather than the cable. Also ideally you want the latest driver from Intel, not Gigabyte, they can on occasion be several releases behind.
 
I grabbed the latest intel driver directly, was hopeful but no luck unfortunately. Already swapped cable over and didn't help.

Not sure what else to try, but disabling autotuning seems to help (although on the Internet Microsoft seem to suggest this shouldn't be necessary).

If I disable the NIC, then re-enable it the problem is fixed for a while as well.

My next steps were probably going to be reformat and reinstall windows, but a bit overkill and may also not fix it!
 
If you have a spare NIC, pop it in, if not then windows ... meh (says the man who has to disable TSO and GSO on remote servers to get gigabit in Ubuntu because intel drivers for Linux are still broken).

*edit* could boot from a live CD and see what you get.
 
Not got a spare one as most of the time the motherboard ones are fine at 1Gbe, it's definitely an odd problem, I suspect as you do that it's Windows/Driver related.

LAN speeds remain fine so the cable is capable of transmitting at 1Gbps, and other devices are fine so it's not the internet speed from the router.

Weird I'm not seeing more people with the problem, but others have reported it on the internet. It's an Intel 1219-V NIC. No official fixes I can see, just people saying to try messing about with various settings but it seems odd that should really be necessary!

Might just bite the bullet and reinstall windows tomorrow and see if the problem follows to a new install.
 
I think I hit a point where it was reformat and see rather than spend more time on investigating it.

So I did that this morning, and so far it's all working fine... I'll monitor and report back if that fixes it in case someone else comes across my post.
 
Hey, thanks for posting I seem to be having a similar issue.

long story short, if I plug the Ethernet cable into my new MacBook Air, I get 100ish Mbs from a speed test.

the same cable goes into the Ethernet port of my rig below? 30 Mbs. I get faster on wiresless.

installed new drivers, had a dig to see if any programs were running that shouldn’t... no effect.

will try safe mode tomorrow and if not then I’ll have to look at the reinstall method :/
 
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