@David-TP 

In the ongoing saga (starting to sound a bit like Days of Our Lives), I bought a new modem, on recommendation from TPG. It arrived this morning (a TP-Link VX420-G2v AX5400) and it is now up and running. I also have an old PC, with an ethernet port, set up next to it so I can test the raw speed. First thing I did of course, and it's delivering 770Mbps down the cat6 cable. The X86 is still running way slower at about 76MBps with the PC connected to it by wifi. I also tried the modem -> cat6 -> X68 -> cat6 -> PC test again, and the X68 is delivering 79Mbps out of the second ethernet port. This seems odd to me. The specs say that the ports are gigabit ports. Could the X86 be faulty? I bought it from an Ebay seller, so it might have been used/refurbished. Is there any way I can test for sure?

Thanks,

Ian

  @David-TP 

Thought I'd done another reply since the last one, but maybe I forgot to hit the Post button. Wouldn't be the first time.

The X86 now works perfectly. It's delivering essentially the same speed down the cat6 cable as it's getting from the modem, it's wifi is now around 640Mbps for my partner's ipad. I learned today that the laptop I was using for testing wifi is speed limited to 150Mbps and I can't change it apparently. It's happy to connect to the 5Ghz channel, but then limits it to 150. Maybe there's a technical reason, who knows. Not me. So, no more testing with that POC.

So I once again unplugged everything on my desktop and moved it to the garage to test directly. It gets 535Mbps from the modem's wifi and 518 from the X68. Given how much the speed measurements fluctuate that's probably close enough to the same, and it's a pretty old PC, so maybe that's reasonable given it's age. A big step down from 750Mbps though.

Speed at my PC from the mesh is still round 100Mbps. I'm still hoping for a bit better than that, but no idea where to go next.

:-\