I have a slow upload on the wired connection. Wireless connection is good and I have no problem with it. But upload speed is about 3 - 5Mbps on a line that is supposed to give me 1Gbps upload and download.

I have done tests by (1) switching cables, (2) multiple factory rests, (3) upgrading the firmware to the latest verion, and (4) multiple power recycle. The duplex is set to 1000Mbps full duplex and QoS setting is disabled.

Can you please help me resolving this issue? 

Thanks