I have used both samknows real speed test as was told to use that by virgin I have also used speed test.net, I also have had an engineer out to house who check all connections and devices in my house to make sure they are capable of receiving the guaranteed speed, he found nothing wrong with hub4 and as I mentioned the speed to hub4 is 1gb, virgin media have also changed settings from their end and restarted the hub4 to see if any changes had any effect, and still nothing seems to get the signal from hub to device to what I should be getting