Hello I'm new here

I have the same Dlink DIR-655 REV A4 FW 1.37EU with the same issue. Starting of this month i got my internet connection upgraded to 1000/1000Mbit and it worked fine for a little month now, but now i only get 147Mbit down and 97Mbit up with QoS enabled. If Disabled QoS I get 222Mbit down and 238Mbit up.
As i have could run 1000/1000Mbit for about a month says to me that it can handle that kind of speeds