@BertEddie 

Hi,

There is no setting for the LAN port's speed on the AX50.

So you can plug the Ethernet cable coming from your PC in any of the four LAN ports of the AX50 and it always connects at 100 Mbps, right? If the LAN port of your PC has diagnostic LEDs, do they come on very shortly after you plug the cable in (like within a second) or does it take some time?

@woozle thanks for the response.

Yes it doesn't matter which of the ports I connect the pc to, they all show as 100mbps.

The port on the pc doesn't show any lights for about 5 seconds. Then a flashing orange light appears. The orange light continues to flash randomly, sometimes one flash, sometimes a few and sometimes 5 flashes or more. The pc ethernet status will recognise it's been connected after a second or so.

It flashes like this when I'm connected to the router via WiFi (but with the cable is still connected obviously) or ethernet cable with WiFi turned off.

@BertEddie 

Maybe this is some compatibility issue. Although I myself have computers with chips from Atheros, Realtek and Asix here and none of them has problems connecting to the AX50 at 1000 Mbps.

Since the AX50 doesn't provide an option to turn auto-negotiation for the LAN ports off, there is nothing you can do.

If it is important to you to get 1000 Mbps and this is a desktop PC, then you could contemplate adding a separate PCI-E 10/100/1000 Mbps network card, provided you have a free PCI-E slot.

@Kevin_Z It's going from the AX50 directly in to the ethernet port on the motherboard of my pc (B450 Tomahawk Max).

The 4 cat 6 cables I bought are all 1.5m long. I've also tried the cat 5e cable included in the box.

All the cables will give 1000mbps from the virgin media router (in modem mode) to the AX50.