Network speed limited

mgeo · Sunday at 18:00

My son has an Msi 370z gaming plus board which has Intel® I219-V Gigabit LAN controller.

We have a 1g broadband service but he can’t anything much over 10mbit download. I tried my laptop on the same line and got over 100, so it’s not the connectivity. We have updated the boards bios to the latest version, tried old and new network drivers but nothing helps.

Intel software that came with the drivers has some diagnostic feature and it says the interrupt status failed.

I have also tried a 1g usb network adapter but speed is also limited on this.

Any ideas what the issue is?

Thanks.

Caged · Sunday at 18:16

Describe how the PC is connected to the router, list every item in the path e.g. cable, wall plate, cable in the wall, wall plate, cable, switch, cable, broadband router (which model?)

mgeo · Sunday at 18:29

It’s virgin media 1giga service. The pc is hard wired direct to the broadband router. I don’t know what model it is, it was only installed yesterday so assume latest model?for info, the issue was there before - we had hoped faster service would resolve it.

radderfire · Sunday at 19:04

Go to Microsoft Copilot and paste in "what is interrupt status in networking?"

You will then see:

Some NIC utilities (like Intel PROSet) run an “Interrupt Status” test to verify that the NIC can generate and handle interrupts correctly. If this test fails, it may indicate a driver, firmware, or hardware issue.

and a link to this Intel community post:

https://community.intel.com/t5/Ethernet-Products/Interrupt-Status-Failed/m-p/1326059?utm_source=copilot.com

and this post:

Network Issues with Intel® Ethernet Controller I225-V

Recommendation to update Non-Volatile Memory (NVM)

www.intel.com

This is not quite your issue, but yours is probably along similar lines.

So, I would suggest making your own post in the Intel forum. You probably have some sort of communication problem from the NIC.

NetMan · Sunday at 19:52

mgeo said:
It’s virgin media 1giga service. The pc is hard wired direct to the broadband router. I don’t know what model it is, it was only installed yesterday so assume latest model?for info, the issue was there before - we had hoped faster service would resolve it.

If you use virgin medias speedtest it will detect the router and give you speed test results for the line as well as the connection to the PC:

Broadband Speed Test – Check Download, Upload, Latency | Virgin Media

Check your internet speed with our free broadband speed test. Run an online speed test and get your download speed, upload speed, latency and more in seconds.

www.virginmedia.com

You said "hardwired" is this just a long pre terminated patch cable or has someone run a cable and installed network sockets etc...

mgeo said:
have a 1g broadband service but he can’t anything much over 10mbit download. I tried my laptop on the same line and got over 100, so it’s not the connectivity.

How much over 100Mb/s did you get with your laptop?

Cat5 is limited to 10/100
Cat5e or better is needed for 100->1000/2500

I'd update the firmware / driver as suggested by radderfire but also test with a new cat5e / cat6 cable if you have got one.

mgeo · Sunday at 22:00

radderfire said:
Go to Microsoft Copilot and paste in "what is interrupt status in networking?"

You will then see:

Some NIC utilities (like Intel PROSet) run an “Interrupt Status” test to verify that the NIC can generate and handle interrupts correctly. If this test fails, it may indicate a driver, firmware, or hardware issue.

and a link to this Intel community post:

https://community.intel.com/t5/Ethernet-Products/Interrupt-Status-Failed/m-p/1326059?utm_source=copilot.com

and this post:

Network Issues with Intel® Ethernet Controller I225-V

Recommendation to update Non-Volatile Memory (NVM)

www.intel.com

This is not quite your issue, but yours is probably along similar lines.

So, I would suggest making your own post in the Intel forum. You probably have some sort of communication problem from the NIC.

Thanks, will do some digging around that

pigeonguyuk · 2026-02-17T14:39:54+0000

I suspect your using an old CAT5 cable limiting speeds.

Had this a lot in work when people moved from Coper to FTTP services. Cable looked same so didnt see point in changing cables

radderfire · 2026-02-17T14:54:33+0000

pigeonguyuk said:
I suspect your using an old CAT5 cable limiting speeds.

Had this a lot in work when people moved from Coper to FTTP services. Cable looked same so didnt see point in changing cables

He did say he's tried his laptop on the same line, and that was ok, but worth checking.

pigeonguyuk · 2026-02-17T15:29:22+0000

radderfire said:
He did say he's tried his laptop on the same line, and that was ok, but worth checking.

If like me its been a different cable used rather than disconnecting it from main PC depending on cable management

radderfire · 2026-02-17T15:32:48+0000

I wonder if he will keep us updated ...

NetMan · 2026-02-17T17:26:34+0000

radderfire said:
I wonder if he will keep us updated ...

Its half term so they might have gone away or he might just be working there's still time for him to come back...

There are too many variables to be sure what the problem is 10mb download does sound like a bad cable to me despite his interupt failed error; he also needs to run the VM speed test I posted because lots of people have problems with speed drops on their old docsis cabling assuming it isn't the rare VM FTTP.

The USB network dongle he tried could be a cable fault, a fault with the VM line, using it in a pre USB3 socket or it might just not be very good..

He was also very vague when he said he got over 100Mb with his laptop and didn't answer my questions about the cables he was using.