I did a speedtest today on my laptop hooked up via Ethernet and managed to get 20 down 40 up (weird right?). I go on my main PC whihc is hooked up via Wi-Fi (specifically the TPLink AC600) and will get less than 10Mbps down and up. I realise I'm using wifi but this is a 802.11AC card, and also my router is N300, which should be plenty to get a signal. Also I'm fairly close to the router. So is it the Wifi card or do I need to tinker some more?