A very strange issue here. I have 2 PCs. One of them, when I do a speed test, shows TBBX1 scores between 7 and 20mbps, where-as multi-thread is correct at 55mbps (max achievable 57). Upload is also correct at 17mbps (max 20).

But on my other PC the TBBX1 speed is full at 55mbps. I have tried a different port, tried direct to the router instead of switch, but I can't figure out what is causing it. So PC1 maxes out at 20mbps on TBBX1 and PC2 is ALWAYS 55mbps on TBBX1, all connected to same network and router and switch and both Windows 10.

What is also odd, is sometimes it WILL be full speed on TBBX1 on PC1, but most of the time not. So I can't work out why sometimes it is okay. I have tried different browsers, shutting down any apps, shutting down firewalls, etc etc. Also because my motherboard has 2 NICS I have tried both, same problem. Tried rebooting router, etc.

Any ideas ?